Add support for number of test workers

Author: shivammathur

Diff for: README.md

@@ -79,6 +79,7 @@ Build a PHP extension for a specific version.
 - `run-tests` (optional) - Run the extension tests. Defaults to `true`.
 - `test-runner` (optional) - The test runner to use. Defaults to `run-tests.php`.
 - `test-opcache-mode` (optional) - Run tests with opcache `on`, `off` or `both`. Defaults to `off`.
+- `test-workers` (optional) - The number of workers to use when running tests. Defaults to `8`.
 - `auth-token` (optional) - Authentication token to use in case the extension is hosted on a private repository.
 
 Instead of having to configure all the inputs for the extension action, you can use the `extension-matrix` action to get the matrix of jobs with different input configurations.

Diff for: extension/BuildPhpExtension/private/Invoke-Tests.ps1

@@ -47,8 +47,12 @@ Function Invoke-Tests {
                 '--set-timeout 120',
                 '-g FAIL,XFAIL,BORK,WARN,LEAK,SKIP'
             )
+            $test_workers = 8
+            if($null -ne $env:TEST_WORKERS -and $env:TEST_WORKERS -ne '') {
+                $test_workers = $env:TEST_WORKERS
+            }
             if($Config.php_version -ge '7.4') {
-                $test_runner_args += '-j8'
+                $test_runner_args += ('-j' + $test_workers)
             }
 
             $opcacheModes = @($env:TEST_OPCACHE_MODE)

Diff for: extension/action.yml

@@ -43,6 +43,10 @@ inputs:
     description: Test opcache mode
     required: false
     default: 'off'
+  test-workers:
+    description: Test workers
+    required: false
+    default: '8'
   build-directory:
     description: Directory to build the extension in
     required: false
@@ -64,6 +68,7 @@ runs:
         RUN_TESTS: ${{inputs.run-tests}}
         TEST_RUNNER: ${{inputs.test-runner}}
         TEST_OPCACHE_MODE: ${{inputs.test-opcache-mode}}
+        TEST_WORKERS: ${{inputs.test-workers}}
         BUILD_DIRECTORY: ${{inputs.build-directory}}
         AUTH_TOKEN: ${{inputs.auth-token}}
         AUTO_DETECT_ARGS: ${{env.auto-detect-args}}