Add parallel-testing parameter

Author: NachoSoto

README.md

@@ -66,6 +66,7 @@ jobs:
           action: build # default = `test`
           code-coverage: true # default = `false`
           test-timeouts: 120 # optional; seconds; enables test timeouts
+          parallel-testing: true # optional; forwards -parallel-testing-enabled YES/NO
           warnings-as-errors: true # default = `false`
           configuration: release # no default, ie. `xcodebuild` decides itself
 ```

action.yml

@@ -142,6 +142,11 @@ inputs:
       `-test-timeouts-enabled=YES` to xcodebuild for test actions.
       (60 seconds is the minimum value.
     required: false
+  parallel-testing:
+    description: |
+      When set, forwards `-parallel-testing-enabled <YES|NO>` to xcodebuild.
+      Use `true` to force enable parallel testing or `false` to disable it.
+    required: false
 runs:
   using: 'node20'
   main: 'dist/index.js'

dist/index.js

@@ -43,6 +43,11 @@ async function main() {
   const action = getAction(selected, platform)
   const configuration = getConfiguration()
   const warningsAsErrors = core.getBooleanInput('warnings-as-errors')
+  const parallelTestingInput = core.getInput('parallel-testing')
+  const parallelTesting =
+    parallelTestingInput === ''
+      ? undefined
+      : core.getBooleanInput('parallel-testing', { trimWhitespace: true })
   const destination = await getDestination(selected, platform, platformVersion)
   const identity = getIdentity(core.getInput('code-sign-identity'), platform)
   const currentVerbosity = verbosity()
@@ -238,6 +243,12 @@ async function main() {
               '-test-timeouts-enabled=YES',
             ])
           }
+          if (parallelTesting !== undefined) {
+            args = args.concat([
+              '-parallel-testing-enabled',
+              parallelTesting ? 'YES' : 'NO',
+            ])
+          }
           break
         }
       }