Use wernight/squid (permissive proxy) and fix verification tests

- Switch from ubuntu/squid to wernight/squid which allows all HTTPS CONNECT
- Fix verification tests to explicitly use -x flag to prove proxy works
- Tests now verify:
  1. Proxy accepts and forwards requests (using curl -x)
  2. Direct blob storage access is blocked by iptables
  3. Blob storage access through proxy succeeds

The cache action should now fail because it doesn't use the proxy,
not because the proxy rejects the connection.

.github/workflows/workflow.yml

@@ -90,187 +90,359 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: ubuntu:latest
-      options: --cap-add=NET_ADMIN
+      options: --privileged
     services:
       squid-proxy:
-        image: ubuntu/squid:latest
+        image: wernight/squid
         ports:
           - 3128:3128
-    env:
-      http_proxy: http://squid-proxy:3128
-      https_proxy: http://squid-proxy:3128
     steps:
-    - name: Wait for proxy to be ready
-      shell: bash
-      run: |
-        echo "Waiting for squid proxy to be ready..."
-        echo "Resolving squid-proxy hostname:"
-        getent hosts squid-proxy || echo "DNS resolution failed"
-        for i in $(seq 1 30); do
-          if (echo > /dev/tcp/squid-proxy/3128) 2>/dev/null; then
-            echo "Proxy is ready!"
-            exit 0
-          fi
-          echo "Attempt $i: Proxy not ready, waiting..."
-          sleep 2
-        done
-        echo "Proxy failed to become ready"
-        exit 1
-      env:
-        http_proxy: ""
-        https_proxy: ""
+    - name: Checkout
+      uses: actions/checkout@v5
     - name: Install dependencies
       run: |
         apt-get update
-        apt-get install -y iptables curl
-    - name: Verify proxy is working
+        apt-get install -y iptables dnsutils curl jq ipset
+    - name: Fetch GitHub meta and configure firewall
       run: |
-        echo "Testing proxy connectivity..."
-        curl -s -o /dev/null -w "%{http_code}" --proxy http://squid-proxy:3128 http://github.com || true
-        echo "Proxy verification complete"
-    - name: Block direct traffic (enforce proxy usage)
-      run: |
-        # Get the squid-proxy container IP
-        PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
-        echo "Proxy IP: $PROXY_IP"
-        
-        # Allow loopback traffic
-        iptables -A OUTPUT -o lo -j ACCEPT
-        
-        # Allow traffic to the proxy container
-        iptables -A OUTPUT -d $PROXY_IP -j ACCEPT
-        
+        # Fetch GitHub meta API to get all IP ranges
+        echo "Fetching GitHub meta API..."
+        curl -sS https://api.github.com/meta > /tmp/github-meta.json
+
+        # Wait for squid-proxy service to be resolvable and accepting connections
+        echo "Waiting for squid-proxy service..."
+        for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
+          PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
+          if [ -n "$PROXY_IP" ]; then
+            echo "squid-proxy resolved to: $PROXY_IP"
+            # Test that proxy is actually accepting connections
+            if curl --connect-timeout 2 --max-time 5 -x http://squid-proxy:3128 -sS https://api.github.com/zen 2>/dev/null; then
+              echo "Proxy is working!"
+              break
+            else
+              echo "Attempt $i: Proxy resolved but not ready yet, waiting..."
+            fi
+          else
+            echo "Attempt $i: squid-proxy not resolvable yet, waiting..."
+          fi
+          sleep 2
+        done
+
+        if [ -z "$PROXY_IP" ]; then
+          echo "ERROR: Could not resolve squid-proxy after 15 attempts"
+          exit 1
+        fi
+
+        # Verify proxy works before locking down firewall
+        echo "Final proxy connectivity test..."
+        if ! curl --connect-timeout 5 --max-time 10 -x http://squid-proxy:3128 -sS https://api.github.com/zen; then
+          echo "ERROR: Proxy is not working properly"
+          exit 1
+        fi
+        echo "Proxy verified working!"
+
         # Allow established connections
         iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-        
-        # Allow DNS (needed for initial resolution)
+
+        # Allow loopback
+        iptables -A OUTPUT -o lo -j ACCEPT
+
+        # Allow connections to the proxy
+        iptables -A OUTPUT -d $PROXY_IP -p tcp --dport 3128 -j ACCEPT
+
+        # Allow DNS
         iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
         iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT
-        
-        # Block all other outbound traffic (HTTP/HTTPS)
+
+        # Create ipset for GitHub IPs (more efficient than individual rules)
+        ipset create github-ips hash:net
+
+        # Add all GitHub IP ranges from meta API (hooks, web, api, git, actions, etc.)
+        # EXCLUDING blob storage which must go through proxy
+        for category in hooks web api git pages importer actions actions_macos codespaces copilot; do
+          echo "Adding IPs for category: $category"
+          jq -r ".${category}[]? // empty" /tmp/github-meta.json 2>/dev/null | while read cidr; do
+            # Skip IPv6 for now (iptables vs ip6tables) - use case for POSIX compatibility
+            case "$cidr" in
+              *:*) ;; # IPv6, skip
+              *) ipset add github-ips "$cidr" 2>/dev/null || true ;;
+            esac
+          done
+        done
+
+        # Allow all GitHub IPs
+        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 443 -j ACCEPT
+        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 80 -j ACCEPT
+
+        # CRITICAL: Block direct access to blob storage and results-receiver
+        # These MUST go through the proxy for cache operations
+        echo "Blocking direct access to cache-critical endpoints..."
+
+        # Block results-receiver.actions.githubusercontent.com
+        for ip in $(getent ahosts "results-receiver.actions.githubusercontent.com" 2>/dev/null | awk '{print $1}' | sort -u); do
+          echo "Blocking direct access to results-receiver: $ip"
+          iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
+        done
+
+        # Block blob.core.windows.net (Azure blob storage used for cache)
+        for host in productionresultssa0.blob.core.windows.net productionresultssa1.blob.core.windows.net productionresultssa2.blob.core.windows.net productionresultssa3.blob.core.windows.net; do
+          for ip in $(getent ahosts "$host" 2>/dev/null | awk '{print $1}' | sort -u); do
+            echo "Blocking direct access to blob storage ($host): $ip"
+            iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
+          done
+        done
+
+        # Block all other outbound HTTP/HTTPS traffic
         iptables -A OUTPUT -p tcp --dport 80 -j REJECT
         iptables -A OUTPUT -p tcp --dport 443 -j REJECT
-        
-        # Log the iptables rules for debugging
-        iptables -L -v -n
-    - name: Verify direct HTTPS is blocked
+
+        echo "iptables rules applied:"
+        iptables -L OUTPUT -n -v
+        echo ""
+        echo "ipset github-ips contains $(ipset list github-ips | grep -c '^[0-9]') entries"
+    - name: Verify proxy enforcement
       run: |
-        echo "Testing that direct HTTPS requests fail..."
-        if curl --noproxy '*' -s --connect-timeout 5 https://github.com > /dev/null 2>&1; then
-          echo "ERROR: Direct HTTPS request succeeded - blocking is not working!"
+        echo "=== Testing proxy enforcement ==="
+
+        # Test 1: Verify proxy is working by explicitly using it
+        echo "Test 1: Connection through proxy (should SUCCEED)"
+        if curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://api.github.com/zen; then
+          echo ""
+          echo "✓ Proxy connection works"
+        else
+          echo "✗ ERROR: Proxy is not working!"
+          exit 1
+        fi
+
+        # Test 2: Direct connection to blob storage should FAIL (blocked by iptables)
+        echo ""
+        echo "Test 2: Direct connection to blob storage (should FAIL - blocked by iptables)"
+        if curl --connect-timeout 5 --max-time 10 --noproxy '*' -sS https://productionresultssa0.blob.core.windows.net 2>/dev/null; then
+          echo "✗ ERROR: Direct blob storage connection succeeded but should have been blocked!"
           exit 1
         else
-          echo "SUCCESS: Direct HTTPS request was blocked as expected"
+          echo "✓ Direct blob storage correctly blocked by iptables"
+        fi
+
+        # Test 3: Connection to blob storage THROUGH proxy should work
+        echo ""
+        echo "Test 3: Connection through proxy to blob storage (should SUCCEED)"
+        HTTP_CODE=$(curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://productionresultssa0.blob.core.windows.net 2>&1) || true
+        echo "HTTP response code: $HTTP_CODE"
+        if [ "$HTTP_CODE" = "400" ] || [ "$HTTP_CODE" = "409" ] || [ "$HTTP_CODE" = "200" ]; then
+          echo "✓ Proxy successfully forwarded request to blob storage (got HTTP $HTTP_CODE)"
+        else
+          echo "✗ ERROR: Proxy failed to forward request (got: $HTTP_CODE)"
+          exit 1
         fi
         
-        echo "Testing that HTTPS through proxy succeeds..."
-        if curl --proxy http://squid-proxy:3128 -s --connect-timeout 10 https://github.com > /dev/null 2>&1; then
-          echo "SUCCESS: HTTPS request through proxy succeeded"
-        else
-          echo "ERROR: HTTPS request through proxy failed!"
-          exit 1
-        fi
-    - name: Checkout
-      uses: actions/checkout@v5
+        echo ""
+        echo "=== All proxy enforcement tests passed ==="
+        echo "The proxy is working. If cache operations fail, it's because the action doesn't use the proxy."
     - name: Generate files
       run: __tests__/create-cache-files.sh proxy test-cache
     - name: Save cache
+      env:
+        http_proxy: http://squid-proxy:3128
+        https_proxy: http://squid-proxy:3128
       uses: ./
       with:
         key: test-proxy-${{ github.run_id }}
         path: test-cache
+    - name: Verify proxy setup
+      run: |
+        echo "## 🔒 Proxy Integration Test - Cache Save" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "### ✅ Test Configuration" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "- **Proxy**: squid-proxy:3128" >> $GITHUB_STEP_SUMMARY
+        echo "- **Firewall**: iptables blocking direct access to cache endpoints" >> $GITHUB_STEP_SUMMARY
+        echo "- **Test**: Cache save operation completed successfully through proxy" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "If the cache save step succeeded, it means:" >> $GITHUB_STEP_SUMMARY
+        echo "1. Direct access to results-receiver.actions.githubusercontent.com was blocked" >> $GITHUB_STEP_SUMMARY
+        echo "2. Direct access to *.blob.core.windows.net was blocked" >> $GITHUB_STEP_SUMMARY  
+        echo "3. Cache operations were routed through the squid proxy" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "✅ **SUCCESS**: Proxy integration test passed!" >> $GITHUB_STEP_SUMMARY
 
   test-proxy-restore:
     needs: test-proxy-save
     runs-on: ubuntu-latest
     container:
       image: ubuntu:latest
-      options: --cap-add=NET_ADMIN
+      options: --privileged
     services:
       squid-proxy:
-        image: ubuntu/squid:latest
+        image: wernight/squid
         ports:
           - 3128:3128
-    env:
-      http_proxy: http://squid-proxy:3128
-      https_proxy: http://squid-proxy:3128
     steps:
-    - name: Wait for proxy to be ready
-      shell: bash
-      run: |
-        echo "Waiting for squid proxy to be ready..."
-        echo "Resolving squid-proxy hostname:"
-        getent hosts squid-proxy || echo "DNS resolution failed"
-        for i in $(seq 1 30); do
-          if (echo > /dev/tcp/squid-proxy/3128) 2>/dev/null; then
-            echo "Proxy is ready!"
-            exit 0
-          fi
-          echo "Attempt $i: Proxy not ready, waiting..."
-          sleep 2
-        done
-        echo "Proxy failed to become ready"
-        exit 1
-      env:
-        http_proxy: ""
-        https_proxy: ""
+    - name: Checkout
+      uses: actions/checkout@v5
     - name: Install dependencies
       run: |
         apt-get update
-        apt-get install -y iptables curl
-    - name: Verify proxy is working
+        apt-get install -y iptables dnsutils curl jq ipset
+    - name: Fetch GitHub meta and configure firewall
       run: |
-        echo "Testing proxy connectivity..."
-        curl -s -o /dev/null -w "%{http_code}" --proxy http://squid-proxy:3128 http://github.com || true
-        echo "Proxy verification complete"
-    - name: Block direct traffic (enforce proxy usage)
-      run: |
-        # Get the squid-proxy container IP
-        PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
-        echo "Proxy IP: $PROXY_IP"
-        
-        # Allow loopback traffic
-        iptables -A OUTPUT -o lo -j ACCEPT
-        
-        # Allow traffic to the proxy container
-        iptables -A OUTPUT -d $PROXY_IP -j ACCEPT
-        
+        # Fetch GitHub meta API to get all IP ranges
+        echo "Fetching GitHub meta API..."
+        curl -sS https://api.github.com/meta > /tmp/github-meta.json
+
+        # Wait for squid-proxy service to be resolvable and accepting connections
+        echo "Waiting for squid-proxy service..."
+        for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
+          PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
+          if [ -n "$PROXY_IP" ]; then
+            echo "squid-proxy resolved to: $PROXY_IP"
+            # Test that proxy is actually accepting connections
+            if curl --connect-timeout 2 --max-time 5 -x http://squid-proxy:3128 -sS https://api.github.com/zen 2>/dev/null; then
+              echo "Proxy is working!"
+              break
+            else
+              echo "Attempt $i: Proxy resolved but not ready yet, waiting..."
+            fi
+          else
+            echo "Attempt $i: squid-proxy not resolvable yet, waiting..."
+          fi
+          sleep 2
+        done
+
+        if [ -z "$PROXY_IP" ]; then
+          echo "ERROR: Could not resolve squid-proxy after 15 attempts"
+          exit 1
+        fi
+
+        # Verify proxy works before locking down firewall
+        echo "Final proxy connectivity test..."
+        if ! curl --connect-timeout 5 --max-time 10 -x http://squid-proxy:3128 -sS https://api.github.com/zen; then
+          echo "ERROR: Proxy is not working properly"
+          exit 1
+        fi
+        echo "Proxy verified working!"
+
         # Allow established connections
         iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-        
-        # Allow DNS (needed for initial resolution)
+
+        # Allow loopback
+        iptables -A OUTPUT -o lo -j ACCEPT
+
+        # Allow connections to the proxy
+        iptables -A OUTPUT -d $PROXY_IP -p tcp --dport 3128 -j ACCEPT
+
+        # Allow DNS
         iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
         iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT
-        
-        # Block all other outbound traffic (HTTP/HTTPS)
+
+        # Create ipset for GitHub IPs (more efficient than individual rules)
+        ipset create github-ips hash:net
+
+        # Add all GitHub IP ranges from meta API (hooks, web, api, git, actions, etc.)
+        # EXCLUDING blob storage which must go through proxy
+        for category in hooks web api git pages importer actions actions_macos codespaces copilot; do
+          echo "Adding IPs for category: $category"
+          jq -r ".${category}[]? // empty" /tmp/github-meta.json 2>/dev/null | while read cidr; do
+            # Skip IPv6 for now (iptables vs ip6tables) - use case for POSIX compatibility
+            case "$cidr" in
+              *:*) ;; # IPv6, skip
+              *) ipset add github-ips "$cidr" 2>/dev/null || true ;;
+            esac
+          done
+        done
+
+        # Allow all GitHub IPs
+        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 443 -j ACCEPT
+        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 80 -j ACCEPT
+
+        # CRITICAL: Block direct access to blob storage and results-receiver
+        # These MUST go through the proxy for cache operations
+        echo "Blocking direct access to cache-critical endpoints..."
+
+        # Block results-receiver.actions.githubusercontent.com
+        for ip in $(getent ahosts "results-receiver.actions.githubusercontent.com" 2>/dev/null | awk '{print $1}' | sort -u); do
+          echo "Blocking direct access to results-receiver: $ip"
+          iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
+        done
+
+        # Block blob.core.windows.net (Azure blob storage used for cache)
+        for host in productionresultssa0.blob.core.windows.net productionresultssa1.blob.core.windows.net productionresultssa2.blob.core.windows.net productionresultssa3.blob.core.windows.net; do
+          for ip in $(getent ahosts "$host" 2>/dev/null | awk '{print $1}' | sort -u); do
+            echo "Blocking direct access to blob storage ($host): $ip"
+            iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
+          done
+        done
+
+        # Block all other outbound HTTP/HTTPS traffic
         iptables -A OUTPUT -p tcp --dport 80 -j REJECT
         iptables -A OUTPUT -p tcp --dport 443 -j REJECT
-        
-        # Log the iptables rules for debugging
-        iptables -L -v -n
-    - name: Verify direct HTTPS is blocked
+
+        echo "iptables rules applied:"
+        iptables -L OUTPUT -n -v
+        echo ""
+        echo "ipset github-ips contains $(ipset list github-ips | grep -c '^[0-9]') entries"
+    - name: Verify proxy enforcement
       run: |
-        echo "Testing that direct HTTPS requests fail..."
-        if curl --noproxy '*' -s --connect-timeout 5 https://github.com > /dev/null 2>&1; then
-          echo "ERROR: Direct HTTPS request succeeded - blocking is not working!"
+        echo "=== Testing proxy enforcement ==="
+
+        # Test 1: Verify proxy is working by explicitly using it
+        echo "Test 1: Connection through proxy (should SUCCEED)"
+        if curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://api.github.com/zen; then
+          echo ""
+          echo "✓ Proxy connection works"
+        else
+          echo "✗ ERROR: Proxy is not working!"
+          exit 1
+        fi
+
+        # Test 2: Direct connection to blob storage should FAIL (blocked by iptables)
+        echo ""
+        echo "Test 2: Direct connection to blob storage (should FAIL - blocked by iptables)"
+        if curl --connect-timeout 5 --max-time 10 --noproxy '*' -sS https://productionresultssa0.blob.core.windows.net 2>/dev/null; then
+          echo "✗ ERROR: Direct blob storage connection succeeded but should have been blocked!"
           exit 1
         else
-          echo "SUCCESS: Direct HTTPS request was blocked as expected"
+          echo "✓ Direct blob storage correctly blocked by iptables"
+        fi
+
+        # Test 3: Connection to blob storage THROUGH proxy should work
+        echo ""
+        echo "Test 3: Connection through proxy to blob storage (should SUCCEED)"
+        HTTP_CODE=$(curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://productionresultssa0.blob.core.windows.net 2>&1) || true
+        echo "HTTP response code: $HTTP_CODE"
+        if [ "$HTTP_CODE" = "400" ] || [ "$HTTP_CODE" = "409" ] || [ "$HTTP_CODE" = "200" ]; then
+          echo "✓ Proxy successfully forwarded request to blob storage (got HTTP $HTTP_CODE)"
+        else
+          echo "✗ ERROR: Proxy failed to forward request (got: $HTTP_CODE)"
+          exit 1
         fi
         
-        echo "Testing that HTTPS through proxy succeeds..."
-        if curl --proxy http://squid-proxy:3128 -s --connect-timeout 10 https://github.com > /dev/null 2>&1; then
-          echo "SUCCESS: HTTPS request through proxy succeeded"
-        else
-          echo "ERROR: HTTPS request through proxy failed!"
-          exit 1
-        fi
-    - name: Checkout
-      uses: actions/checkout@v5
+        echo ""
+        echo "=== All proxy enforcement tests passed ==="
+        echo "The proxy is working. If cache operations fail, it's because the action doesn't use the proxy."
     - name: Restore cache
+      env:
+        http_proxy: http://squid-proxy:3128
+        https_proxy: http://squid-proxy:3128
       uses: ./
       with:
         key: test-proxy-${{ github.run_id }}
         path: test-cache
+    - name: Verify proxy setup
+      run: |
+        echo "## 🔒 Proxy Integration Test - Cache Restore" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "### ✅ Test Configuration" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "- **Proxy**: squid-proxy:3128" >> $GITHUB_STEP_SUMMARY
+        echo "- **Firewall**: iptables blocking direct access to cache endpoints" >> $GITHUB_STEP_SUMMARY
+        echo "- **Test**: Cache restore operation completed successfully through proxy" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "If the cache restore step succeeded, it means:" >> $GITHUB_STEP_SUMMARY
+        echo "1. Direct access to results-receiver.actions.githubusercontent.com was blocked" >> $GITHUB_STEP_SUMMARY
+        echo "2. Direct access to *.blob.core.windows.net was blocked" >> $GITHUB_STEP_SUMMARY  
+        echo "3. Cache operations were routed through the squid proxy" >> $GITHUB_STEP_SUMMARY
+        echo "" >> $GITHUB_STEP_SUMMARY
+        echo "✅ **SUCCESS**: Proxy integration test passed!" >> $GITHUB_STEP_SUMMARY
     - name: Verify cache
       run: __tests__/verify-cache-files.sh proxy test-cache

.licenses/npm/@actions/cache.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/cache"
-version: 6.0.1
+version: 5.0.5
 type: npm
 summary: Actions cache lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/cache

.licenses/npm/@actions/core.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/core"
-version: 3.0.1
+version: 2.0.3
 type: npm
 summary: Actions core lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/core

.licenses/npm/@actions/exec.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/exec"
-version: 3.0.0
+version: 2.0.0
 type: npm
 summary: Actions exec lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/exec

.licenses/npm/@actions/glob.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/glob"
-version: 0.6.1
+version: 0.5.1
 type: npm
 summary: Actions glob lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/glob

.licenses/npm/@actions/http-client.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/http-client"
-version: 4.0.1
+version: 3.0.2
 type: npm
 summary: Actions Http Client
 homepage: https://github.com/actions/toolkit/tree/main/packages/http-client

.licenses/npm/@actions/io.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@actions/io"
-version: 3.0.2
+version: 2.0.0
 type: npm
 summary: Actions io lib
 homepage: https://github.com/actions/toolkit/tree/main/packages/io

.licenses/npm/@azure/abort-controller-1.1.0.dep.yml

@@ -1,16 +1,16 @@
 ---
-name: fast-xml-builder
-version: 1.2.0
+name: "@azure/abort-controller"
+version: 1.1.0
 type: npm
-summary: Build XML from JSON without C/C++ based libraries
-homepage: 
+summary: Microsoft Azure SDK for JavaScript - Aborter
+homepage: https://github.com/Azure/azure-sdk-for-js/tree/main/sdk/core/abort-controller/README.md
 license: mit
 licenses:
 - sources: LICENSE
   text: |
-    MIT License
+    The MIT License (MIT)
 
-    Copyright (c) 2026 Natural Intelligence
+    Copyright (c) 2020 Microsoft
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal

.licenses/npm/@azure/core-http-compat.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-http-compat"
-version: 2.4.0
+version: 2.3.1
 type: npm
 summary: Core HTTP Compatibility Library to bridge the gap between Core V1 & V2 packages.
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-compat/

.licenses/npm/@azure/core-rest-pipeline.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-rest-pipeline"
-version: 1.23.0
+version: 1.22.2
 type: npm
 summary: Isomorphic client library for making HTTP requests in node.js and browser.
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-rest-pipeline/

.licenses/npm/@azure/core-xml.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/core-xml"
-version: 1.5.1
+version: 1.5.0
 type: npm
 summary: Core library for interacting with XML payloads
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/core-xml/

.licenses/npm/@azure/storage-blob.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/storage-blob"
-version: 12.31.0
+version: 12.30.0
 type: npm
 summary: Microsoft Azure Storage SDK for JavaScript - Blob
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/storage/storage-blob/

.licenses/npm/@azure/storage-common.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@azure/storage-common"
-version: 12.3.0
+version: 12.2.0
 type: npm
 summary: Azure Storage Common Client Library for JavaScript
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/storage/storage-internal-avro/

.licenses/npm/@nodable/entities.dep.yml

@@ -1,11 +0,0 @@
----
-name: "@nodable/entities"
-version: 2.1.0
-type: npm
-summary: Entity parser for XML, HTML, External entites with security and NCR control
-homepage: 
-license: mit
-licenses:
-- sources: README.md
-  text: MIT
-notices: []

.licenses/npm/@typespec/ts-http-runtime.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: "@typespec/ts-http-runtime"
-version: 0.3.5
+version: 0.3.2
 type: npm
 summary: Isomorphic client library for making HTTP requests in node.js and browser.
 homepage: https://github.com/Azure/azure-sdk-for-js/blob/main/sdk/core/ts-http-runtime/

.licenses/npm/fast-xml-parser.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: fast-xml-parser
-version: 5.8.0
+version: 5.3.3
 type: npm
 summary: Validate XML, Parse XML, Build XML without C/C++ based libraries
-homepage: 
+homepage:
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/minimatch.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: minimatch
-version: 3.1.5
+version: 3.1.2
 type: npm
 summary: a glob matcher in javascript
-homepage:
+homepage: 
 license: isc
 licenses:
 - sources: LICENSE

.licenses/npm/path-expression-matcher.dep.yml

@@ -1,32 +0,0 @@
----
-name: path-expression-matcher
-version: 1.5.0
-type: npm
-summary: Efficient path tracking and pattern matching for XML/JSON parsers
-homepage: https://github.com/NaturalIntelligence/path-expression-matcher#readme
-license: mit
-licenses:
-- sources: LICENSE
-  text: |
-    MIT License
-
-    Copyright (c) 2024
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.
-notices: []

.licenses/npm/semver.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: semver
-version: 7.8.0
+version: 6.3.1
 type: npm
 summary: The semantic version parser used by npm.
 homepage: 

.licenses/npm/strnum.dep.yml

@@ -1,9 +1,9 @@
 ---
 name: strnum
-version: 2.3.0
+version: 2.1.2
 type: npm
 summary: Parse String to Number based on configuration
-homepage: 
+homepage:
 license: mit
 licenses:
 - sources: LICENSE

.licenses/npm/undici.dep.yml

@@ -1,6 +1,6 @@
 ---
 name: undici
-version: 6.25.0
+version: 6.23.0
 type: npm
 summary: An HTTP/1.1 client, written from scratch for Node.js
 homepage: https://undici.nodejs.org

.licenses/npm/xml-naming.dep.yml

@@ -1,12 +0,0 @@
----
-name: xml-naming
-version: 0.1.0
-type: npm
-summary: Validates XML name productions — Name, NCName, QName, NMToken, NMTokens —
-  for XML 1.0 and 1.1
-homepage: 
-license: mit
-licenses:
-- sources: README.md
-  text: MIT
-notices: []

README.md

@@ -38,11 +38,6 @@ Upgrading to the recommended versions will not break your workflows.
 
 Read more about the change & access the migration guide: [reference to the announcement](https://github.com/actions/cache/discussions/1510).
 
-### v6
-
-* Updated `@actions/cache`, `@actions/core`, `@actions/exec` to latest major versions
-* Migrated to ESM module system
-
 ### v5
 
 * Updated to node 24
@@ -132,7 +127,7 @@ jobs:
 
     - name: Cache Primes
       id: cache-primes
-      uses: actions/cache@v6
+      uses: actions/cache@v5
       with:
         path: prime-numbers
         key: ${{ runner.os }}-primes
@@ -163,7 +158,7 @@ jobs:
 
     - name: Restore cached Primes
       id: cache-primes-restore
-      uses: actions/cache/restore@v6
+      uses: actions/cache/restore@v5
       with:
         path: |
           path/to/dependencies
@@ -174,7 +169,7 @@ jobs:
     .
     - name: Save Primes
       id: cache-primes-save
-      uses: actions/cache/save@v6
+      uses: actions/cache/save@v5
       with:
         path: |
           path/to/dependencies
@@ -229,7 +224,7 @@ A cache key can include any of the contexts, functions, literals, and operators
 For example, using the [`hashFiles`](https://docs.github.com/en/actions/learn-github-actions/expressions#hashfiles) function allows you to create a new cache when dependencies change.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -247,7 +242,7 @@ Additionally, you can use arbitrary command output in a cache key, such as a dat
       echo "date=$(/bin/date -u "+%Y%m%d")" >> $GITHUB_OUTPUT
     shell: bash
 
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: path/to/dependencies
       key: ${{ runner.os }}-${{ steps.get-date.outputs.date }}-${{ hashFiles('**/lockfiles') }}
@@ -269,7 +264,7 @@ Example:
 steps:
   - uses: actions/checkout@v6
 
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     id: cache
     with:
       path: path/to/dependencies
@@ -301,7 +296,7 @@ jobs:
 
       - name: Cache Primes
         id: cache-primes
-        uses: actions/cache@v6
+        uses: actions/cache@v5
         with:
           path: prime-numbers
           key: primes
@@ -312,7 +307,7 @@ jobs:
 
       - name: Cache Numbers
         id: cache-numbers
-        uses: actions/cache@v6
+        uses: actions/cache@v5
         with:
           path: numbers
           key: primes
@@ -328,7 +323,7 @@ jobs:
 
       - name: Cache Primes
         id: cache-primes
-        uses: actions/cache@v6
+        uses: actions/cache@v5
         with:
           path: prime-numbers
           key: primes

RELEASES.md

@@ -25,18 +25,6 @@
 
 ## Changelog
 
-### 6.0.0
-
-- Updated `@actions/cache` to ^6.0.1, `@actions/core` to ^3.0.1, `@actions/exec` to ^3.0.0, `@actions/io` to ^3.0.2
-- Migrated to ESM module system
-- Upgraded Jest to v30 and test infrastructure to be ESM compatible
-
-### 5.0.4
-
-- Bump `minimatch` to v3.1.5 (fixes ReDoS via globstar patterns)
-- Bump `undici` to v6.24.1 (WebSocket decompression bomb protection, header validation fixes)
-- Bump `fast-xml-parser` to v5.5.6
-
 ### 5.0.3
 
 - Bump `@actions/cache` to v5.0.5 (Resolves: https://github.com/actions/cache/security/dependabot/33)

__tests__/actionUtils.test.ts

@@ -1,66 +1,25 @@
-import { afterAll, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, RefKey } from "../src/constants";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
-
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, RefKey } = await import("../src/constants");
-const actionUtils = await import("../src/utils/actionUtils");
-const testUtils = await import("../src/utils/testUtils");
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
 
 let pristineEnv: NodeJS.ProcessEnv;
 
+beforeAll(() => {
+    pristineEnv = process.env;
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
+});
+
 beforeEach(() => {
-    pristineEnv = { ...process.env };
-    jest.clearAllMocks();
-    jest.mocked(core.getInput).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
-        }
-    );
+    jest.resetModules();
+    process.env = pristineEnv;
     delete process.env[Events.Key];
     delete process.env[RefKey];
 });
@@ -88,46 +47,74 @@ test("isGhes returns false when server url is github.com", () => {
 });
 
 test("isExactKeyMatch with undefined cache key returns false", () => {
-    expect(actionUtils.isExactKeyMatch("linux-rust", undefined)).toBe(false);
+    const key = "linux-rust";
+    const cacheKey = undefined;
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(false);
 });
 
 test("isExactKeyMatch with empty cache key returns false", () => {
-    expect(actionUtils.isExactKeyMatch("linux-rust", "")).toBe(false);
+    const key = "linux-rust";
+    const cacheKey = "";
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(false);
 });
 
 test("isExactKeyMatch with different keys returns false", () => {
-    expect(actionUtils.isExactKeyMatch("linux-rust", "linux-")).toBe(false);
+    const key = "linux-rust";
+    const cacheKey = "linux-";
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(false);
 });
 
 test("isExactKeyMatch with different key accents returns false", () => {
-    expect(actionUtils.isExactKeyMatch("linux-áccent", "linux-accent")).toBe(
-        false
-    );
+    const key = "linux-áccent";
+    const cacheKey = "linux-accent";
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(false);
 });
 
 test("isExactKeyMatch with same key returns true", () => {
-    expect(actionUtils.isExactKeyMatch("linux-rust", "linux-rust")).toBe(true);
+    const key = "linux-rust";
+    const cacheKey = "linux-rust";
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(true);
 });
 
 test("isExactKeyMatch with same key and different casing returns true", () => {
-    expect(actionUtils.isExactKeyMatch("linux-rust", "LINUX-RUST")).toBe(true);
+    const key = "linux-rust";
+    const cacheKey = "LINUX-RUST";
+
+    expect(actionUtils.isExactKeyMatch(key, cacheKey)).toBe(true);
 });
 
 test("logWarning logs a message with a warning prefix", () => {
     const message = "A warning occurred.";
+
+    const infoMock = jest.spyOn(core, "info");
+
     actionUtils.logWarning(message);
-    expect(core.info).toHaveBeenCalledWith(`[warning]${message}`);
+
+    expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
 });
 
 test("isValidEvent returns false for event that does not have a branch or tag", () => {
-    process.env[Events.Key] = "foo";
-    expect(actionUtils.isValidEvent()).toBe(false);
+    const event = "foo";
+    process.env[Events.Key] = event;
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(false);
 });
 
 test("isValidEvent returns true for event that has a ref", () => {
-    process.env[Events.Key] = Events.Push;
+    const event = Events.Push;
+    process.env[Events.Key] = event;
     process.env[RefKey] = "ref/heads/feature";
-    expect(actionUtils.isValidEvent()).toBe(true);
+
+    const isValidEvent = actionUtils.isValidEvent();
+
+    expect(isValidEvent).toBe(true);
 });
 
 test("getInputAsArray returns empty array if not required and missing", () => {
@@ -137,7 +124,7 @@ test("getInputAsArray returns empty array if not required and missing", () => {
 test("getInputAsArray throws error if required and missing", () => {
     expect(() =>
         actionUtils.getInputAsArray("foo", { required: true })
-    ).toThrow();
+    ).toThrowError();
 });
 
 test("getInputAsArray handles single line correctly", () => {
@@ -193,7 +180,7 @@ test("getInputAsInt returns undefined if input is invalid or NaN", () => {
 test("getInputAsInt throws if required and value missing", () => {
     expect(() =>
         actionUtils.getInputAsInt("undefined", { required: true })
-    ).toThrow();
+    ).toThrowError();
 });
 
 test("getInputAsBool returns false if input not set", () => {
@@ -213,65 +200,68 @@ test("getInputAsBool returns false if input is invalid or NaN", () => {
 test("getInputAsBool throws if required and value missing", () => {
     expect(() =>
         actionUtils.getInputAsBool("undefined2", { required: true })
-    ).toThrow();
+    ).toThrowError();
 });
 
 test("isCacheFeatureAvailable for ac enabled", () => {
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(true);
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => true);
+
     expect(actionUtils.isCacheFeatureAvailable()).toBe(true);
 });
 
 test("isCacheFeatureAvailable for ac disabled on GHES", () => {
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(false);
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
 
     const message = `Cache action is only supported on GHES version >= 3.5. If you are on version >=3.5 Please check with GHES admin if Actions cache service is enabled or not.
 Otherwise please upgrade to GHES version >= 3.5 and If you are also using Github Connect, please unretire the actions/cache namespace before upgrade (see https://docs.github.com/en/enterprise-server@3.5/admin/github-actions/managing-access-to-actions-from-githubcom/enabling-automatic-access-to-githubcom-actions-using-github-connect#automatic-retirement-of-namespaces-for-actions-accessed-on-githubcom)`;
+    const infoMock = jest.spyOn(core, "info");
 
     try {
         process.env["GITHUB_SERVER_URL"] = "http://example.com";
         expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
-        expect(core.info).toHaveBeenCalledWith(`[warning]${message}`);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
     } finally {
         delete process.env["GITHUB_SERVER_URL"];
     }
 });
 
 test("isCacheFeatureAvailable for ac disabled on dotcom", () => {
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(false);
+    jest.spyOn(cache, "isFeatureAvailable").mockImplementation(() => false);
 
     const message =
         "An internal error has occurred in cache backend. Please check https://www.githubstatus.com/ for any ongoing issue in actions.";
+    const infoMock = jest.spyOn(core, "info");
 
     try {
         process.env["GITHUB_SERVER_URL"] = "http://github.com";
         expect(actionUtils.isCacheFeatureAvailable()).toBe(false);
-        expect(core.info).toHaveBeenCalledWith(`[warning]${message}`);
+        expect(infoMock).toHaveBeenCalledWith(`[warning]${message}`);
     } finally {
         delete process.env["GITHUB_SERVER_URL"];
     }
 });
 
-test("isGhes returns false when the GITHUB_SERVER_URL environment variable is not defined", () => {
+test("isGhes returns false when the GITHUB_SERVER_URL environment variable is not defined", async () => {
     delete process.env["GITHUB_SERVER_URL"];
     expect(actionUtils.isGhes()).toBeFalsy();
 });
 
-test("isGhes returns false when the GITHUB_SERVER_URL environment variable is set to github.com", () => {
+test("isGhes returns false when the GITHUB_SERVER_URL environment variable is set to github.com", async () => {
     process.env["GITHUB_SERVER_URL"] = "https://github.com";
     expect(actionUtils.isGhes()).toBeFalsy();
 });
 
-test("isGhes returns false when the GITHUB_SERVER_URL environment variable is set to a GitHub Enterprise Cloud-style URL", () => {
+test("isGhes returns false when the GITHUB_SERVER_URL environment variable is set to a GitHub Enterprise Cloud-style URL", async () => {
     process.env["GITHUB_SERVER_URL"] = "https://contoso.ghe.com";
     expect(actionUtils.isGhes()).toBeFalsy();
 });
 
-test("isGhes returns false when the GITHUB_SERVER_URL environment variable has a .localhost suffix", () => {
+test("isGhes returns false when the GITHUB_SERVER_URL environment variable has a .localhost suffix", async () => {
     process.env["GITHUB_SERVER_URL"] = "https://mock-github.localhost";
     expect(actionUtils.isGhes()).toBeFalsy();
 });
 
-test("isGhes returns true when the GITHUB_SERVER_URL environment variable is set to some other URL", () => {
+test("isGhes returns true when the GITHUB_SERVER_URL environment variable is set to some other URL", async () => {
     process.env["GITHUB_SERVER_URL"] = "https://src.onpremise.fabrikam.com";
     expect(actionUtils.isGhes()).toBeTruthy();
 });

__tests__/restore.test.ts

@@ -1,66 +1,50 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, RefKey } from "../src/constants";
+import { restoreRun } from "../src/restoreImpl";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, RefKey } = await import("../src/constants");
-const { restoreRun } = await import("../src/restoreImpl");
-const testUtils = await import("../src/utils/testUtils");
-
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getInput as jest.Mock).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+beforeAll(() => {
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.isExactKeyMatch(key, cacheResult);
         }
     );
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsArray(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsBool(name, options);
+        }
+    );
+});
+
+beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -78,12 +62,19 @@ test("restore with no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [],
@@ -93,10 +84,12 @@ test("restore with no cache found", async () => {
         false
     );
 
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledTimes(1);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}`
     );
 });
@@ -112,12 +105,19 @@ test("restore with restore keys and no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [restoreKey],
@@ -127,10 +127,12 @@ test("restore with restore keys and no cache found", async () => {
         false
     );
 
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledTimes(1);
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}, ${restoreKey}`
     );
 });
@@ -144,12 +146,20 @@ test("restore with cache found for key", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(key);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [],
@@ -159,13 +169,15 @@ test("restore with cache found for key", async () => {
         false
     );
 
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_RESULT", key);
-    expect(core.saveState).toHaveBeenCalledTimes(2);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "true");
-    expect(core.info).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with cache found for restore key", async () => {
@@ -179,20 +191,39 @@ test("restore with cache found for restore key", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(restoreKey);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);
-    expect(core.saveState).toHaveBeenCalledTimes(2);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache restored from key: ${restoreKey}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("Fail restore when fail on cache miss is enabled and primary + restore keys not found", async () => {
@@ -206,17 +237,35 @@ test("Fail restore when fail on cache miss is enabled and primary + restore keys
         failOnCacheMiss: true
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(0);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(0);
+
+    expect(failedMock).toHaveBeenCalledWith(
         `Failed to restore cache entry. Exiting as fail-on-cache-miss is set. Input key: ${key}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(1);
 });
 
 test("restore when fail on cache miss is enabled and primary key doesn't match restored key", async () => {
@@ -230,20 +279,40 @@ test("restore when fail on cache miss is enabled and primary key doesn't match r
         failOnCacheMiss: true
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(restoreKey);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);
-    expect(core.saveState).toHaveBeenCalledTimes(2);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", restoreKey);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache restored from key: ${restoreKey}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with fail on cache miss disabled and no cache found", async () => {
@@ -257,15 +326,33 @@ test("restore with fail on cache miss disabled and no cache found", async () =>
         failOnCacheMiss: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledTimes(1);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledTimes(1);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}, ${restoreKey}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/restoreImpl.test.ts

@@ -1,68 +1,51 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, Inputs, RefKey } from "../src/constants";
+import { restoreImpl } from "../src/restoreImpl";
+import { StateProvider } from "../src/stateProvider";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, Inputs, RefKey } = await import("../src/constants");
-const { restoreImpl } = await import("../src/restoreImpl");
-const { StateProvider } = await import("../src/stateProvider");
-const testUtils = await import("../src/utils/testUtils");
-
-beforeEach(() => {
-    jest.clearAllMocks();
-    jest.mocked(core.getInput).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+beforeAll(() => {
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.isExactKeyMatch(key, cacheResult);
         }
     );
-    jest.mocked(core.getState).mockReturnValue("");
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsArray(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsBool(name, options);
+        }
+    );
+});
+
+beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -72,45 +55,52 @@ afterEach(() => {
 });
 
 test("restore with invalid event outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
     const invalidEvent = "commit_comment";
     process.env[Events.Key] = invalidEvent;
     delete process.env[RefKey];
     await restoreImpl(new StateProvider());
-    expect(core.info).toHaveBeenCalledWith(
-        `[warning]Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore without AC available should no-op", async () => {
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(false);
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(0);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
 });
 
 test("restore on GHES without AC available should no-op", async () => {
-    process.env["GITHUB_SERVER_URL"] = "https://my-ghes-server.com";
-    jest.mocked(cache.isFeatureAvailable).mockReturnValue(false);
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(0);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
-    expect(core.info).toHaveBeenCalledWith(
-        expect.stringContaining(
-            "Cache action is only supported on GHES version >= 3.5"
-        )
-    );
-
-    delete process.env["GITHUB_SERVER_URL"];
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
 });
 
 test("restore on GHES with AC available ", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
     const path = "node_modules";
     const key = "node-test";
     testUtils.setInputs({
@@ -119,12 +109,20 @@ test("restore on GHES with AC available ", async () => {
         enableCrossOsArchive: false
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(key);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [],
@@ -134,26 +132,32 @@ test("restore on GHES with AC available ", async () => {
         false
     );
 
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "true");
-    expect(core.info).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with no path should fail", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await restoreImpl(new StateProvider());
-    expect(cache.restoreCache).toHaveBeenCalledTimes(0);
-    expect(core.setFailed).not.toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    // this input isn't necessary for restore b/c tarball contains entries relative to workspace
+    expect(failedMock).not.toHaveBeenCalledWith(
         "Input required and not supplied: path"
     );
 });
 
 test("restore with no key", async () => {
     testUtils.setInput(Inputs.Path, "node_modules");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await restoreImpl(new StateProvider());
-    expect(cache.restoreCache).toHaveBeenCalledTimes(0);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledWith(
         "Input required and not supplied: key"
     );
 });
@@ -168,32 +172,46 @@ test("restore with too many keys should fail", async () => {
         restoreKeys,
         enableCrossOsArchive: false
     });
-    jest.mocked(cache.restoreCache).mockRejectedValue(
-        new Error("Key Validation Error: Keys are limited to a maximum of 10.")
-    );
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await restoreImpl(new StateProvider());
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        restoreKeys,
+        {
+            lookupOnly: false
+        },
+        false
+    );
+    expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: Keys are limited to a maximum of 10.`
     );
 });
 
 test("restore with large key should fail", async () => {
     const path = "node_modules";
-    const key = "foo".repeat(512);
+    const key = "foo".repeat(512); // Over the 512 character limit
     testUtils.setInputs({
         path: path,
         key,
         enableCrossOsArchive: false
     });
-    jest.mocked(cache.restoreCache).mockRejectedValue(
-        new Error(
-            `Key Validation Error: ${key} cannot be larger than 512 characters.`
-        )
-    );
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await restoreImpl(new StateProvider());
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+    expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: ${key} cannot be larger than 512 characters.`
     );
 });
@@ -206,12 +224,20 @@ test("restore with invalid key should fail", async () => {
         key,
         enableCrossOsArchive: false
     });
-    jest.mocked(cache.restoreCache).mockRejectedValue(
-        new Error(`Key Validation Error: ${key} cannot contain commas.`)
-    );
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
     await restoreImpl(new StateProvider());
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+    expect(failedMock).toHaveBeenCalledWith(
         `Key Validation Error: ${key} cannot contain commas.`
     );
 });
@@ -225,14 +251,32 @@ test("restore with no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}`
     );
 });
@@ -248,14 +292,32 @@ test("restore with restore keys and no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}, ${restoreKey}`
     );
 });
@@ -269,16 +331,35 @@ test("restore with cache found for key", async () => {
         enableCrossOsArchive: false
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(key);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "true");
-    expect(core.info).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with cache found for restore key", async () => {
@@ -292,18 +373,36 @@ test("restore with cache found for restore key", async () => {
         enableCrossOsArchive: false
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(restoreKey);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "false");
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache restored from key: ${restoreKey}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with lookup-only set", async () => {
@@ -315,12 +414,20 @@ test("restore with lookup-only set", async () => {
         lookupOnly: true
     });
 
-    jest.mocked(cache.restoreCache).mockResolvedValue(key);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const stateMock = jest.spyOn(core, "saveState");
+    const setCacheHitOutputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
 
     await restoreImpl(new StateProvider());
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [],
@@ -330,30 +437,31 @@ test("restore with lookup-only set", async () => {
         false
     );
 
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_KEY", key);
-    expect(core.saveState).toHaveBeenCalledWith("CACHE_RESULT", key);
-    expect(core.saveState).toHaveBeenCalledTimes(2);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "true");
-    expect(core.info).toHaveBeenCalledWith(
+    expect(stateMock).toHaveBeenCalledWith("CACHE_KEY", key);
+    expect(stateMock).toHaveBeenCalledWith("CACHE_RESULT", key);
+    expect(stateMock).toHaveBeenCalledTimes(2);
+
+    expect(setCacheHitOutputMock).toHaveBeenCalledTimes(1);
+    expect(setCacheHitOutputMock).toHaveBeenCalledWith("cache-hit", "true");
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache found and can be restored from key: ${key}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore failure with earlyExit should call process exit", async () => {
     testUtils.setInput(Inputs.Path, "node_modules");
-    const processExitMock = jest
-        .spyOn(process, "exit")
-        // eslint-disable-next-line @typescript-eslint/no-explicit-any
-        .mockImplementation((() => {}) as any);
+    const failedMock = jest.spyOn(core, "setFailed");
+    const restoreCacheMock = jest.spyOn(cache, "restoreCache");
+    const processExitMock = jest.spyOn(process, "exit").mockImplementation();
 
+    // call restoreImpl with `earlyExit` set to true
     await restoreImpl(new StateProvider(), true);
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(0);
-    expect(core.setFailed).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledWith(
         "Input required and not supplied: key"
     );
     expect(processExitMock).toHaveBeenCalledWith(1);
-    processExitMock.mockRestore();
 });

__tests__/restoreOnly.test.ts

@@ -1,66 +1,51 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, RefKey } from "../src/constants";
+import { restoreOnlyRun } from "../src/restoreImpl";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, RefKey } = await import("../src/constants");
-const { restoreOnlyRun } = await import("../src/restoreImpl");
-const testUtils = await import("../src/utils/testUtils");
-
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getInput as jest.Mock).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+beforeAll(() => {
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.isExactKeyMatch(key, cacheResult);
         }
     );
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            const actualUtils = jest.requireActual("../src/utils/actionUtils");
+            return actualUtils.getInputAsArray(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+});
+
+beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -78,12 +63,19 @@ test("restore with no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreOnlyRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(cache.restoreCache).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
         [path],
         key,
         [],
@@ -93,10 +85,11 @@ test("restore with no cache found", async () => {
         false
     );
 
-    expect(core.setOutput).toHaveBeenCalledWith("cache-primary-key", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(1);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}`
     );
 });
@@ -112,14 +105,32 @@ test("restore with restore keys and no cache found", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(undefined);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(undefined);
+        });
 
     await restoreOnlyRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-primary-key", key);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(failedMock).toHaveBeenCalledTimes(0);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache not found for input keys: ${key}, ${restoreKey}`
     );
 });
@@ -133,17 +144,36 @@ test("restore with cache found for key", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(key);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(key);
+        });
 
     await restoreOnlyRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-primary-key", key);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "true");
-    expect(core.setOutput).toHaveBeenCalledWith("cache-matched-key", key);
-    expect(core.setOutput).toHaveBeenCalledTimes(3);
-    expect(core.info).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [],
+        {
+            lookupOnly: false
+        },
+        false
+    );
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledWith("cache-hit", "true");
+    expect(outputMock).toHaveBeenCalledWith("cache-matched-key", key);
+
+    expect(outputMock).toHaveBeenCalledTimes(3);
+
+    expect(infoMock).toHaveBeenCalledWith(`Cache restored from key: ${key}`);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("restore with cache found for restore key", async () => {
@@ -157,20 +187,36 @@ test("restore with cache found for restore key", async () => {
         enableCrossOsArchive: false
     });
 
-    (cache.restoreCache as jest.Mock).mockResolvedValue(restoreKey);
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
+    const outputMock = jest.spyOn(core, "setOutput");
+    const restoreCacheMock = jest
+        .spyOn(cache, "restoreCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(restoreKey);
+        });
 
     await restoreOnlyRun();
 
-    expect(cache.restoreCache).toHaveBeenCalledTimes(1);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-primary-key", key);
-    expect(core.setOutput).toHaveBeenCalledWith("cache-hit", "false");
-    expect(core.setOutput).toHaveBeenCalledWith(
-        "cache-matched-key",
-        restoreKey
+    expect(restoreCacheMock).toHaveBeenCalledTimes(1);
+    expect(restoreCacheMock).toHaveBeenCalledWith(
+        [path],
+        key,
+        [restoreKey],
+        {
+            lookupOnly: false
+        },
+        false
     );
-    expect(core.setOutput).toHaveBeenCalledTimes(3);
-    expect(core.info).toHaveBeenCalledWith(
+
+    expect(outputMock).toHaveBeenCalledWith("cache-primary-key", key);
+    expect(outputMock).toHaveBeenCalledWith("cache-hit", "false");
+    expect(outputMock).toHaveBeenCalledWith("cache-matched-key", restoreKey);
+
+    expect(outputMock).toHaveBeenCalledTimes(3);
+
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache restored from key: ${restoreKey}`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/save.test.ts

@@ -1,66 +1,70 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, Inputs, RefKey } from "../src/constants";
+import { saveRun } from "../src/saveImpl";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, Inputs, RefKey } = await import("../src/constants");
-const { saveRun } = await import("../src/saveImpl");
-const testUtils = await import("../src/utils/testUtils");
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
 
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getInput as jest.Mock).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+    jest.spyOn(core, "getState").mockImplementation(name => {
+        return jest.requireActual("@actions/core").getState(name);
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsArray(name, options);
         }
     );
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+});
+
+beforeEach(() => {
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -70,24 +74,36 @@ afterEach(() => {
 });
 
 test("save with valid inputs uploads a cache", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
     testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = 4;
-    (cache.saveCache as jest.Mock).mockResolvedValue(cacheId);
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
 
     await saveRun();
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(cache.saveCache).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
         {
@@ -96,5 +112,5 @@ test("save with valid inputs uploads a cache", async () => {
         false
     );
 
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/saveImpl.test.ts

@@ -1,68 +1,68 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, Inputs, RefKey } from "../src/constants";
+import { saveImpl } from "../src/saveImpl";
+import { StateProvider } from "../src/stateProvider";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, Inputs, RefKey } = await import("../src/constants");
-const { saveImpl } = await import("../src/saveImpl");
-const { StateProvider } = await import("../src/stateProvider");
-const testUtils = await import("../src/utils/testUtils");
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
 
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getInput as jest.Mock).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsArray(name, options);
         }
     );
-    (core.getState as jest.Mock).mockReturnValue("");
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+});
+
+beforeEach(() => {
+    jest.restoreAllMocks();
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -72,69 +72,99 @@ afterEach(() => {
 });
 
 test("save with invalid event outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
     const invalidEvent = "commit_comment";
     process.env[Events.Key] = invalidEvent;
     delete process.env[RefKey];
     await saveImpl(new StateProvider());
-    expect(core.info).toHaveBeenCalledWith(
-        `[warning]Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Event Validation Error: The event type ${invalidEvent} is not supported because it's not tied to a branch or tag ref.`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with no primary key in state outputs warning", async () => {
-    (core.getState as jest.Mock).mockReturnValue("");
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
+    const savedCacheKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return "";
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(`[warning]Key is not specified.`);
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(logWarningMock).toHaveBeenCalledWith(`Key is not specified.`);
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save without AC available should no-op", async () => {
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(0);
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
 });
 
 test("save on ghes without AC available should no-op", async () => {
-    process.env["GITHUB_SERVER_URL"] = "https://my-ghes-server.com";
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(false);
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => false
+    );
+
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
-        expect.stringContaining(
-            "Cache action is only supported on GHES version >= 3.5"
-        )
-    );
-
-    delete process.env["GITHUB_SERVER_URL"];
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
 });
 
 test("save on GHES with AC available", async () => {
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => true);
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
     testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = 4;
-    (cache.saveCache as jest.Mock).mockResolvedValue(cacheId);
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(cache.saveCache).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
         {
@@ -143,135 +173,229 @@ test("save on GHES with AC available", async () => {
         false
     );
 
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with exact match returns early", async () => {
-    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const infoMock = jest.spyOn(core, "info");
+    const failedMock = jest.spyOn(core, "setFailed");
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(primaryKey);
+    const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
+    const savedCacheKey = primaryKey;
+
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(infoMock).toHaveBeenCalledWith(
         `Cache hit occurred on the primary key ${primaryKey}, not saving cache.`
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with missing input outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
+    const saveCacheMock = jest.spyOn(cache, "saveCache");
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(0);
-    expect(core.info).toHaveBeenCalledWith(
-        "[warning]Input required and not supplied: path"
+    expect(saveCacheMock).toHaveBeenCalledTimes(0);
+    expect(logWarningMock).toHaveBeenCalledWith(
+        "Input required and not supplied: path"
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with large cache outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
 
-    (cache.saveCache as jest.Mock).mockRejectedValue(
-        new Error(
-            "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
-        )
-    );
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            throw new Error(
+                "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
+            );
+        });
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(core.info).toHaveBeenCalledWith(
-        "[warning]Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything(),
+        false
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith(
+        "Cache size of ~6144 MB (6442450944 B) is over the 5GB limit, not saving cache."
+    );
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with reserve cache failure outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
 
-    (cache.saveCache as jest.Mock).mockRejectedValue(
-        new Error(
-            `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
-        )
-    );
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            const actualCache = jest.requireActual("@actions/cache");
+            const error = new actualCache.ReserveCacheError(
+                `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+            );
+            throw error;
+        });
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(core.info).toHaveBeenCalledWith(
-        `[warning]Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything(),
+        false
     );
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+
+    expect(logWarningMock).toHaveBeenCalledWith(
+        `Unable to reserve cache with key ${primaryKey}, another job may be creating this cache.`
+    );
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with server error outputs warning", async () => {
+    const logWarningMock = jest.spyOn(actionUtils, "logWarning");
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
 
-    (cache.saveCache as jest.Mock).mockRejectedValue(
-        new Error("HTTP Error Occurred")
-    );
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            throw new Error("HTTP Error Occurred");
+        });
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(core.info).toHaveBeenCalledWith("[warning]HTTP Error Occurred");
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
+        [inputPath],
+        primaryKey,
+        expect.anything(),
+        false
+    );
+
+    expect(logWarningMock).toHaveBeenCalledTimes(1);
+    expect(logWarningMock).toHaveBeenCalledWith("HTTP Error Occurred");
+
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save with valid inputs uploads a cache", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
     const savedCacheKey = "Linux-node-";
 
-    (core.getState as jest.Mock)
-        .mockReturnValueOnce(primaryKey)
-        .mockReturnValueOnce(savedCacheKey);
+    jest.spyOn(core, "getState")
+        // Cache Entry State
+        .mockImplementationOnce(() => {
+            return savedCacheKey;
+        })
+        // Cache Key State
+        .mockImplementationOnce(() => {
+            return primaryKey;
+        });
 
     const inputPath = "node_modules";
     testUtils.setInput(Inputs.Path, inputPath);
     testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = 4;
-    (cache.saveCache as jest.Mock).mockResolvedValue(cacheId);
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
 
     await saveImpl(new StateProvider());
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(cache.saveCache).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
         {
@@ -280,5 +404,5 @@ test("save with valid inputs uploads a cache", async () => {
         false
     );
 
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });

__tests__/saveOnly.test.ts

@@ -1,66 +1,70 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as cache from "@actions/cache";
+import * as core from "@actions/core";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+import { Events, Inputs, RefKey } from "../src/constants";
+import { saveOnlyRun } from "../src/saveImpl";
+import * as actionUtils from "../src/utils/actionUtils";
+import * as testUtils from "../src/utils/testUtils";
 
-// Mock @actions/cache
-jest.unstable_mockModule("@actions/cache", () => ({
-    restoreCache: jest.fn(),
-    saveCache: jest.fn(),
-    isFeatureAvailable: jest.fn(() => true),
-    ReserveCacheError: class ReserveCacheError extends Error {
-        constructor(message: string) {
-            super(message);
-            this.name = "ReserveCacheError";
-        }
-    }
-}));
+jest.mock("@actions/core");
+jest.mock("@actions/cache");
+jest.mock("../src/utils/actionUtils");
 
-const core = await import("@actions/core");
-const cache = await import("@actions/cache");
-const { Events, Inputs, RefKey } = await import("../src/constants");
-const { saveOnlyRun } = await import("../src/saveImpl");
-const testUtils = await import("../src/utils/testUtils");
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
 
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getInput as jest.Mock).mockImplementation(
-        (name: string, options?: { required?: boolean }) => {
-            const val =
-                process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] ||
-                "";
-            if (options && options.required && !val) {
-                throw new Error(`Input required and not supplied: ${name}`);
-            }
-            return val.trim();
+    jest.spyOn(core, "setOutput").mockImplementation((key, value) => {
+        return jest.requireActual("@actions/core").getInput(key, value);
+    });
+
+    jest.spyOn(actionUtils, "getInputAsArray").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsArray(name, options);
         }
     );
-    (cache.isFeatureAvailable as jest.Mock).mockReturnValue(true);
+
+    jest.spyOn(actionUtils, "getInputAsInt").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsInt(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "getInputAsBool").mockImplementation(
+        (name, options) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .getInputAsBool(name, options);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isExactKeyMatch").mockImplementation(
+        (key, cacheResult) => {
+            return jest
+                .requireActual("../src/utils/actionUtils")
+                .isExactKeyMatch(key, cacheResult);
+        }
+    );
+
+    jest.spyOn(actionUtils, "isValidEvent").mockImplementation(() => {
+        const actualUtils = jest.requireActual("../src/utils/actionUtils");
+        return actualUtils.isValidEvent();
+    });
+});
+
+beforeEach(() => {
     process.env[Events.Key] = Events.Push;
     process.env[RefKey] = "refs/heads/feature-branch";
+
+    jest.spyOn(actionUtils, "isGhes").mockImplementation(() => false);
+    jest.spyOn(actionUtils, "isCacheFeatureAvailable").mockImplementation(
+        () => true
+    );
 });
 
 afterEach(() => {
@@ -70,6 +74,8 @@ afterEach(() => {
 });
 
 test("save with valid inputs uploads a cache", async () => {
+    const failedMock = jest.spyOn(core, "setFailed");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
 
     const inputPath = "node_modules";
@@ -78,12 +84,16 @@ test("save with valid inputs uploads a cache", async () => {
     testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = 4;
-    (cache.saveCache as jest.Mock).mockResolvedValue(cacheId);
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
 
     await saveOnlyRun();
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(cache.saveCache).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
         {
@@ -92,10 +102,12 @@ test("save with valid inputs uploads a cache", async () => {
         false
     );
 
-    expect(core.setFailed).toHaveBeenCalledTimes(0);
+    expect(failedMock).toHaveBeenCalledTimes(0);
 });
 
 test("save failing logs the warning message", async () => {
+    const warningMock = jest.spyOn(core, "warning");
+
     const primaryKey = "Linux-node-bb828da54c148048dd17899ba9fda624811cfb43";
 
     const inputPath = "node_modules";
@@ -104,12 +116,16 @@ test("save failing logs the warning message", async () => {
     testUtils.setInput(Inputs.UploadChunkSize, "4000000");
 
     const cacheId = -1;
-    (cache.saveCache as jest.Mock).mockResolvedValue(cacheId);
+    const saveCacheMock = jest
+        .spyOn(cache, "saveCache")
+        .mockImplementationOnce(() => {
+            return Promise.resolve(cacheId);
+        });
 
     await saveOnlyRun();
 
-    expect(cache.saveCache).toHaveBeenCalledTimes(1);
-    expect(cache.saveCache).toHaveBeenCalledWith(
+    expect(saveCacheMock).toHaveBeenCalledTimes(1);
+    expect(saveCacheMock).toHaveBeenCalledWith(
         [inputPath],
         primaryKey,
         {
@@ -118,6 +134,6 @@ test("save failing logs the warning message", async () => {
         false
     );
 
-    expect(core.warning).toHaveBeenCalledTimes(1);
-    expect(core.warning).toHaveBeenCalledWith("Cache save failed.");
+    expect(warningMock).toHaveBeenCalledTimes(1);
+    expect(warningMock).toHaveBeenCalledWith("Cache save failed.");
 });

__tests__/stateProvider.test.ts

@@ -1,41 +1,22 @@
-import { afterEach, beforeEach, expect, jest, test } from "@jest/globals";
+import * as core from "@actions/core";
 
-import type { IStateProvider } from "../src/stateProvider";
+import { Events, RefKey, State } from "../src/constants";
+import {
+    IStateProvider,
+    NullStateProvider,
+    StateProvider
+} from "../src/stateProvider";
 
-// Mock @actions/core
-jest.unstable_mockModule("@actions/core", () => ({
-    getInput: jest.fn((name: string, options?: { required?: boolean }) => {
-        const val =
-            process.env[`INPUT_${name.replace(/ /g, "_").toUpperCase()}`] || "";
-        if (options && options.required && !val) {
-            throw new Error(`Input required and not supplied: ${name}`);
-        }
-        return val.trim();
-    }),
-    setOutput: jest.fn(),
-    setFailed: jest.fn(),
-    info: jest.fn(),
-    warning: jest.fn(),
-    debug: jest.fn(),
-    error: jest.fn(),
-    saveState: jest.fn(),
-    getState: jest.fn(() => ""),
-    isDebug: jest.fn(() => false),
-    exportVariable: jest.fn(),
-    addPath: jest.fn(),
-    group: jest.fn((name: string, fn: () => Promise<unknown>) => fn()),
-    startGroup: jest.fn(),
-    endGroup: jest.fn()
-}));
+jest.mock("@actions/core");
 
-const core = await import("@actions/core");
-const { Events, RefKey, State } = await import("../src/constants");
-const { NullStateProvider, StateProvider } =
-    await import("../src/stateProvider");
+beforeAll(() => {
+    jest.spyOn(core, "getInput").mockImplementation((name, options) => {
+        return jest.requireActual("@actions/core").getInput(name, options);
+    });
 
-beforeEach(() => {
-    jest.clearAllMocks();
-    (core.getState as jest.Mock).mockReturnValue("");
+    jest.spyOn(core, "setOutput").mockImplementation((key, value) => {
+        return jest.requireActual("@actions/core").setOutput(key, value);
+    });
 });
 
 afterEach(() => {
@@ -45,14 +26,21 @@ afterEach(() => {
 
 test("StateProvider saves states", async () => {
     const states = new Map<string, string>();
-    (core.getState as jest.Mock).mockImplementation(
-        (key: string) => states.get(key) || ""
-    );
-    (core.saveState as jest.Mock).mockImplementation(
-        (key: string, value: string) => {
+    const getStateMock = jest
+        .spyOn(core, "getState")
+        .mockImplementation(key => states.get(key) || "");
+
+    const saveStateMock = jest
+        .spyOn(core, "saveState")
+        .mockImplementation((key, value) => {
             states.set(key, value);
-        }
-    );
+        });
+
+    const setOutputMock = jest
+        .spyOn(core, "setOutput")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").setOutput(key, value);
+        });
 
     const cacheMatchedKey = "node-cache";
 
@@ -64,19 +52,38 @@ test("StateProvider saves states", async () => {
 
     expect(stateValue).toBe("stateValue");
     expect(cacheStateValue).toBe(cacheMatchedKey);
-    expect(core.getState).toHaveBeenCalledTimes(2);
-    expect(core.saveState).toHaveBeenCalledTimes(2);
-    expect(core.setOutput).toHaveBeenCalledTimes(0);
+    expect(getStateMock).toHaveBeenCalledTimes(2);
+    expect(saveStateMock).toHaveBeenCalledTimes(2);
+    expect(setOutputMock).toHaveBeenCalledTimes(0);
 });
 
 test("NullStateProvider saves outputs", async () => {
+    const getStateMock = jest
+        .spyOn(core, "getState")
+        .mockImplementation(name =>
+            jest.requireActual("@actions/core").getState(name)
+        );
+
+    const setOutputMock = jest
+        .spyOn(core, "setOutput")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").setOutput(key, value);
+        });
+
+    const saveStateMock = jest
+        .spyOn(core, "saveState")
+        .mockImplementation((key, value) => {
+            return jest.requireActual("@actions/core").saveState(key, value);
+        });
+
+    const cacheMatchedKey = "node-cache";
     const nullStateProvider: IStateProvider = new NullStateProvider();
     nullStateProvider.setState(State.CacheMatchedKey, "outputValue");
-    nullStateProvider.setState(State.CachePrimaryKey, "node-cache");
+    nullStateProvider.setState(State.CachePrimaryKey, cacheMatchedKey);
     nullStateProvider.getState("outputKey");
     nullStateProvider.getCacheState();
 
-    expect(core.getState).toHaveBeenCalledTimes(0);
-    expect(core.setOutput).toHaveBeenCalledTimes(2);
-    expect(core.saveState).toHaveBeenCalledTimes(0);
+    expect(getStateMock).toHaveBeenCalledTimes(0);
+    expect(setOutputMock).toHaveBeenCalledTimes(2);
+    expect(saveStateMock).toHaveBeenCalledTimes(0);
 });

caching-strategies.md

@@ -12,7 +12,7 @@ This document lists some of the strategies (and example workflows if possible) w
 jobs:
   build:
     runs-on: ubuntu-latest
-    - uses: actions/cache@v6
+    - uses: actions/cache@v5
       with:
         key: ${{ some-metadata }}-cache
 ```
@@ -24,7 +24,7 @@ In your workflows, you can use different strategies to name your key depending o
 One of the most common use case is to use hash for lockfile as key. This way, same cache will be restored for a lockfile until there's a change in dependencies listed in lockfile.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -37,7 +37,7 @@ One of the most common use case is to use hash for lockfile as key. This way, sa
 If cache is not found matching the primary key, restore keys can be used to download the closest matching cache that was recently created. This ensures that the build/install step will need to additionally fetch just a handful of newer dependencies, and hence saving build time.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -54,7 +54,7 @@ The restore keys can be provided as a complete name, or a prefix, read more [her
 In case of workflows with matrix running for multiple Operating Systems, the caches can be stored separately for each of them. This can be used in combination with hashfiles in case multiple caches are being generated per OS.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -73,7 +73,7 @@ Caches scoped to the particular workflow run id or run attempt can be stored and
 On similar lines, commit sha can be used to create a very specialized and short lived cache.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -86,7 +86,7 @@ On similar lines, commit sha can be used to create a very specialized and short
 Cache key can be formed by combination of more than one metadata, evaluated info.
 
 ```yaml
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: |
         path/to/dependencies
@@ -148,7 +148,7 @@ In case you are using a centralized job to create and save your cache that can b
 steps:
   - uses: actions/checkout@v6
 
-  - uses: actions/cache/restore@v6
+  - uses: actions/cache/restore@v5
     id: cache
     with:
       path: path/to/dependencies
@@ -173,7 +173,7 @@ You can use the output of this action to exit the workflow on cache miss. This w
 steps:
   - uses: actions/checkout@v6
 
-  - uses: actions/cache/restore@v6
+  - uses: actions/cache/restore@v5
     id: cache
     with:
       path: path/to/dependencies
@@ -194,7 +194,7 @@ steps:
 If you want to avoid re-computing the cache key again in `save` action, the outputs from `restore` action can be used as input to the `save` action.
 
 ```yaml
-  - uses: actions/cache/restore@v6
+  - uses: actions/cache/restore@v5
     id: restore-cache
     with:
       path: |
@@ -204,7 +204,7 @@ If you want to avoid re-computing the cache key again in `save` action, the outp
   .
   .
   .
-  - uses: actions/cache/save@v6
+  - uses: actions/cache/save@v5
     with:
       path: |
         path/to/dependencies
@@ -219,7 +219,7 @@ On the other hand, the key can also be explicitly re-computed while executing th
 Let's say we have a restore step that computes key at runtime
 
 ```yaml
-uses: actions/cache/restore@v6
+uses: actions/cache/restore@v5
 id: restore-cache
 with:
     key: cache-${{ hashFiles('**/lockfiles') }}
@@ -228,7 +228,7 @@ with:
 Case 1: Where an user would want to reuse the key as it is
 
 ```yaml
-uses: actions/cache/save@v6
+uses: actions/cache/save@v5
 with:
     key: ${{ steps.restore-cache.outputs.cache-primary-key }}
 ```
@@ -236,7 +236,7 @@ with:
 Case 2: Where the user would want to re-evaluate the key
 
 ```yaml
-uses: actions/cache/save@v6
+uses: actions/cache/save@v5
 with:
     key: npm-cache-${{hashfiles(package-lock.json)}}
 ```
@@ -258,7 +258,7 @@ steps:
   - name: Build
     run: ./build-parent-module.sh
 
-  - uses: actions/cache/save@v6
+  - uses: actions/cache/save@v5
     id: cache
     with:
       path: path/to/dependencies
@@ -271,7 +271,7 @@ steps:
 steps:
   - uses: actions/checkout@v6
 
-  - uses: actions/cache/restore@v6
+  - uses: actions/cache/restore@v5
     id: cache
     with:
       path: path/to/dependencies

dist/restore-only/package.json

@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}

dist/restore/package.json

@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}

dist/save-only/package.json

@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}

dist/save/package.json

@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}

examples.md

@@ -45,21 +45,21 @@
 ## Bun
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.bun/install/cache
-    key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+    key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lockb') }}
 ```
 
 ### Windows
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~\.bun
-    key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+    key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lockb') }}
 ```
 
 ## C# - NuGet
@@ -67,7 +67,7 @@
 Using [NuGet lock files](https://docs.microsoft.com/nuget/consume-packages/package-references-in-project-files#locking-dependencies):
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ~/.nuget/packages
     key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
@@ -79,7 +79,7 @@ Depending on the environment, huge packages might be pre-installed in the global
 From `actions/cache@v3` onwards, you can now exclude unwanted packages with [exclude pattern](https://github.com/actions/toolkit/tree/main/packages/glob#exclude-patterns)
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.nuget/packages
@@ -96,7 +96,7 @@ Or you could move the cache folder like below.
 env:
   NUGET_PACKAGES: ${{ github.workspace }}/.nuget/packages
 steps:
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: ${{ github.workspace }}/.nuget/packages
       key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
@@ -108,7 +108,7 @@ steps:
 
 ```yaml
 - name: Cache lein project dependencies
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: ~/.m2/repository
     key: ${{ runner.os }}-clojure-${{ hashFiles('**/project.clj') }}
@@ -122,7 +122,7 @@ steps:
 ### POSIX
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ~/.dub
     key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.selections.json') }}
@@ -133,7 +133,7 @@ steps:
 ### Windows
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ~\AppData\Local\dub
     key: ${{ runner.os }}-dub-${{ hashFiles('**/dub.selections.json') }}
@@ -146,7 +146,7 @@ steps:
 ### Linux
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.deno
@@ -157,7 +157,7 @@ steps:
 ### macOS
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.deno
@@ -168,7 +168,7 @@ steps:
 ### Windows
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~\.deno
@@ -179,7 +179,7 @@ steps:
 ## Elixir - Mix
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       deps
@@ -191,7 +191,7 @@ steps:
 
 ## Erlang - Rebar3
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.cache/rebar3
@@ -206,7 +206,7 @@ steps:
 ### Linux
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.cache/go-build
@@ -219,7 +219,7 @@ steps:
 ### macOS
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/Library/Caches/go-build
@@ -232,7 +232,7 @@ steps:
 ### Windows
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~\AppData\Local\go-build
@@ -248,7 +248,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 
 ```yaml
 - name: Cache ~/.cabal/packages, ~/.cabal/store and dist-newstyle
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: |
       ~/.cabal/packages
@@ -263,14 +263,14 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 ### Linux or macOS
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   name: Cache ~/.stack
   with:
     path: ~/.stack
     key: ${{ runner.os }}-stack-global-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}
     restore-keys: |
       ${{ runner.os }}-stack-global-
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   name: Cache .stack-work
   with:
     path: .stack-work
@@ -282,7 +282,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 ### Windows
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   name: Cache %APPDATA%\stack %LOCALAPPDATA%\Programs\stack
   with:
     path: |
@@ -291,7 +291,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
     key: ${{ runner.os }}-stack-global-${{ hashFiles('stack.yaml') }}-${{ hashFiles('package.yaml') }}
     restore-keys: |
       ${{ runner.os }}-stack-global-
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   name: Cache .stack-work
   with:
     path: .stack-work
@@ -305,7 +305,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 > **Note** Ensure no Gradle daemons are running anymore when your workflow completes. Creating the cache package might fail due to locks being held by Gradle. Refer to the [Gradle Daemon documentation](https://docs.gradle.org/current/userguide/gradle_daemon.html) on how to disable or stop the Gradle Daemons.
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.gradle/caches
@@ -319,7 +319,7 @@ We cache the elements of the Cabal store separately, as the entirety of `~/.caba
 
 ```yaml
 - name: Cache local Maven repository
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: ~/.m2/repository
     key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -355,7 +355,7 @@ After [deprecation](https://github.blog/changelog/2022-10-11-github-actions-depr
 `Get npm cache directory` step can then be used with `actions/cache` as shown below
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
   with:
     path: ${{ steps.npm-cache-dir.outputs.dir }}
@@ -368,7 +368,7 @@ After [deprecation](https://github.blog/changelog/2022-10-11-github-actions-depr
 
 ```yaml
 - name: restore lerna
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: '**/node_modules'
     key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
@@ -382,7 +382,7 @@ The yarn cache directory will depend on your operating system and version of `ya
   id: yarn-cache-dir-path
   run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
 
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
   with:
     path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
@@ -400,7 +400,7 @@ The yarn 2 cache directory will depend on your config. See https://yarnpkg.com/c
   id: yarn-cache-dir-path
   run: echo "dir=$(yarn config get cacheFolder)" >> $GITHUB_OUTPUT
 
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
   with:
     path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
@@ -415,7 +415,7 @@ Esy allows you to export built dependencies and import pre-built dependencies.
 ```yaml
     - name: Restore Cache
       id: restore-cache
-      uses: actions/cache@v6
+      uses: actions/cache@v5
       with:
         path: _export
         key:  ${{ runner.os }}-esy-${{ hashFiles('esy.lock/index.json') }}
@@ -444,7 +444,7 @@ Esy allows you to export built dependencies and import pre-built dependencies.
   id: composer-cache
   run: |
     echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ${{ steps.composer-cache.outputs.dir }}
     key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
@@ -465,7 +465,7 @@ Locations:
 ### Simple example
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ~/.cache/pip
     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
@@ -478,7 +478,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
 ### Multiple OS's in a workflow
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   if: startsWith(runner.os, 'Linux')
   with:
     path: ~/.cache/pip
@@ -486,7 +486,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
     restore-keys: |
       ${{ runner.os }}-pip-
 
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   if: startsWith(runner.os, 'macOS')
   with:
     path: ~/Library/Caches/pip
@@ -494,7 +494,7 @@ Replace `~/.cache/pip` with the correct `path` if not using Ubuntu.
     restore-keys: |
       ${{ runner.os }}-pip-
 
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   if: startsWith(runner.os, 'Windows')
   with:
     path: ~\AppData\Local\pip\Cache
@@ -520,7 +520,7 @@ jobs:
         - os: windows-latest
           path: ~\AppData\Local\pip\Cache
     steps:
-    - uses: actions/cache@v6
+    - uses: actions/cache@v5
       with:
         path: ${{ matrix.path }}
         key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
@@ -539,7 +539,7 @@ jobs:
     echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
 
 - name: pip cache
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: ${{ steps.pip-cache.outputs.dir }}
     key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
@@ -557,7 +557,7 @@ jobs:
 
   ⋮
 
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: ~/.local/share/virtualenvs
     key: ${{ runner.os }}-python-${{ steps.setup-python.outputs.python-version }}-pipenv-${{ hashFiles('Pipfile.lock') }}
@@ -584,7 +584,7 @@ For renv, the cache directory will vary by OS. The `RENV_PATHS_ROOT` environment
     cat("##[set-output name=r-version;]", R.Version()$version.string, sep = "")
   shell: Rscript {0}
 - name: Restore Renv package cache
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: ${{ env.RENV_PATHS_ROOT }}
     key: ${{ steps.get-version.outputs.os-version }}-${{ steps.get-version.outputs.r-version }}-${{ inputs.cache-version }}-${{ hashFiles('renv.lock') }}
@@ -610,7 +610,7 @@ whenever possible:
 ## Rust - Cargo
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: |
       ~/.cargo/bin/
@@ -625,7 +625,7 @@ whenever possible:
 
 ```yaml
 - name: Cache SBT
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: |
       ~/.ivy2/cache
@@ -636,7 +636,7 @@ whenever possible:
 ## Swift, Objective-C - Carthage
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: Carthage
     key: ${{ runner.os }}-carthage-${{ hashFiles('**/Cartfile.resolved') }}
@@ -647,7 +647,7 @@ whenever possible:
 ## Swift, Objective-C - CocoaPods
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: Pods
     key: ${{ runner.os }}-pods-${{ hashFiles('**/Podfile.lock') }}
@@ -658,7 +658,7 @@ whenever possible:
 ## Swift - Swift Package Manager
 
 ```yaml
-- uses: actions/cache@v6
+- uses: actions/cache@v5
   with:
     path: .build
     key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}
@@ -673,7 +673,7 @@ env:
   MINT_PATH: .mint/lib
   MINT_LINK_PATH: .mint/bin
 steps:
-  - uses: actions/cache@v6
+  - uses: actions/cache@v5
     with:
       path: .mint
       key: ${{ runner.os }}-mint-${{ hashFiles('**/Mintfile') }}
@@ -689,7 +689,7 @@ steps:
 
 ```yaml
 - name: Cache Bazel
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: |
       ~/.cache/bazel
@@ -703,7 +703,7 @@ steps:
 
 ```yaml
 - name: Cache Bazel
-  uses: actions/cache@v6
+  uses: actions/cache@v5
   with:
     path: |
       /private/var/tmp/_bazel_runner/

jest.config.js

@@ -0,0 +1,23 @@
+require("nock").disableNetConnect();
+
+module.exports = {
+    clearMocks: true,
+    moduleFileExtensions: ["js", "ts"],
+    testEnvironment: "node",
+    testMatch: ["**/*.test.ts"],
+    testRunner: "jest-circus/runner",
+    transform: {
+        "^.+\\.ts$": "ts-jest"
+    },
+    verbose: true
+};
+
+const processStdoutWrite = process.stdout.write.bind(process.stdout);
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
+process.stdout.write = (str, encoding, cb) => {
+    // Core library will directly call process.stdout.write for commands
+    // We don't want :: commands to be executed by the runner during tests
+    if (!String(str).match(/^::/)) {
+        return processStdoutWrite(str, encoding, cb);
+    }
+};

jest.config.ts

@@ -1,21 +0,0 @@
-export default {
-    clearMocks: true,
-    moduleFileExtensions: ["js", "ts"],
-    roots: ["<rootDir>/__tests__"],
-    testEnvironment: "node",
-    testMatch: ["**/*.test.ts"],
-    transform: {
-        "^.+\\.ts$": [
-            "ts-jest",
-            {
-                useESM: true,
-                diagnostics: {
-                    ignoreCodes: [151002]
-                }
-            }
-        ]
-    },
-    extensionsToTreatAsEsm: [".ts"],
-    transformIgnorePatterns: ["node_modules/(?!(@actions)/)"],
-    verbose: true
-};

package.json

@@ -1,13 +1,12 @@
 {
   "name": "cache",
-  "version": "6.0.0",
+  "version": "5.0.3",
   "private": true,
   "description": "Cache dependencies and build outputs",
-  "type": "module",
   "main": "dist/restore/index.js",
   "scripts": {
     "build": "tsc && ncc build -o dist/restore src/restore.ts && ncc build -o dist/save src/save.ts && ncc build -o dist/restore-only src/restoreOnly.ts && ncc build -o dist/save-only src/saveOnly.ts",
-    "test": "tsc --noEmit && node --experimental-vm-modules node_modules/jest/bin/jest.js --coverage",
+    "test": "tsc --noEmit && jest --coverage",
     "lint": "eslint **/*.ts --cache",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts"
@@ -24,13 +23,13 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
-    "@actions/cache": "^6.0.1",
-    "@actions/core": "^3.0.1",
-    "@actions/exec": "^3.0.0",
-    "@actions/io": "^3.0.2"
+    "@actions/cache": "^5.0.5",
+    "@actions/core": "^2.0.3",
+    "@actions/exec": "^2.0.0",
+    "@actions/io": "^2.0.0"
   },
   "devDependencies": {
-    "@types/jest": "^30.0.0",
+    "@types/jest": "^29.5.14",
     "@types/nock": "^11.1.0",
     "@types/node": "^24.1.0",
     "@typescript-eslint/eslint-plugin": "^7.2.0",
@@ -42,11 +41,11 @@
     "eslint-plugin-jest": "^27.9.0",
     "eslint-plugin-prettier": "^5.5.3",
     "eslint-plugin-simple-import-sort": "^12.1.1",
-    "jest": "^30.2.0",
+    "jest": "^29.7.0",
+    "jest-circus": "^29.7.0",
     "nock": "^13.2.9",
     "prettier": "^3.6.2",
     "ts-jest": "^29.4.0",
-    "ts-node": "^10.9.2",
     "typescript": "^5.8.3"
   },
   "engines": {

tips-and-workarounds.md

@@ -12,7 +12,7 @@ A cache today is immutable and cannot be updated. But some use cases require the
 
   ```yaml
       - name: update cache on every commit
-        uses: actions/cache@v6
+        uses: actions/cache@v5
         with:
           path: prime-numbers
           key: primes-${{ runner.os }}-${{ github.run_id }} # Can use time based key as well

tsconfig.json

@@ -1,13 +1,63 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
-    "module": "ESNext",
-    "outDir": "./lib",
-    "rootDir": "./src",
-    "strict": true,
-    "noImplicitAny": false,
-    "moduleResolution": "bundler",
-    "esModuleInterop": true
+    /* Basic Options */
+    // "incremental": true,                   /* Enable incremental compilation */
+    "target": "es6",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "./lib",                        /* Redirect output structure to the directory. */
+    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    "noImplicitAny": false,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
   },
-  "exclude": ["node_modules", "**/*.test.ts", "jest.config.ts", "__tests__"]
+  "exclude": ["node_modules", "**/*.test.ts"]
 }