feat: add maxWorkers option to CdkCliIntegTestsWorkflow (#841)

* feat: add maxWorkers option to CdkCliIntegTestsWorkflow

* chore: self mutation

Signed-off-by: github-actions <[email protected]>

---------

Signed-off-by: github-actions <[email protected]>
Co-authored-by: github-actions <[email protected]>

Author: mrgrain

API.md

@@ -75,6 +75,14 @@ export interface CdkCliIntegTestsWorkflowProps {
    * @default - atmosphere is not used
    */
   readonly enableAtmosphere?: AtmosphereOptions;
+
+
+  /**
+   * Specifies the maximum number of workers the worker-pool will spawn for running tests.
+   *
+   * @default - the cli integ test package determines a sensible default
+   */
+  readonly maxWorkers?: string;
 }
 
 /**
@@ -120,6 +128,11 @@ export class CdkCliIntegTestsWorkflow extends Component {
       }
     });
 
+    let maxWorkersArg = '';
+    if (props.maxWorkers) {
+      maxWorkersArg = ` --maxWorkers=${props.maxWorkers}`;
+    }
+
     runTestsWorkflow.on({
       pullRequestTarget: {
         branches: ['main'],
@@ -384,7 +397,7 @@ export class CdkCliIntegTestsWorkflow extends Component {
         {
           name: 'Run the test suite: ${{ matrix.suite }}',
           run: [
-            'bin/run-suite --use-cli-release=${{ steps.versions.outputs.cli_version }} --framework-version=${{ steps.versions.outputs.lib_version }} ${{ matrix.suite }}',
+            `bin/run-suite${maxWorkersArg} --use-cli-release=\${{ steps.versions.outputs.cli_version }} --framework-version=\${{ steps.versions.outputs.lib_version }} \${{ matrix.suite }}`,
           ].join('\n'),
           env: {
             JSII_SILENCE_WARNING_DEPRECATED_NODE_VERSION: 'true',

src/cdk-cli-integ-tests.ts

@@ -45,3 +45,23 @@ test('snapshot test for the CDK CLI integ tests using atmosphere', () => {
   const outdir = Testing.synth(repo);
   expect(outdir).toMatchSnapshot();
 });
+
+test('can set maxworkers', () => {
+  const repo = new yarn.CdkLabsMonorepo({
+    name: 'monorepo',
+    defaultReleaseBranch: 'main',
+  });
+
+  new CdkCliIntegTestsWorkflow(repo, {
+    approvalEnvironment: 'approval',
+    testEnvironment: 'test',
+    buildRunsOn: 'runsOn',
+    testRunsOn: 'testRunsOn',
+    localPackages: ['@aws-cdk/bla', '@aws-cdk/bloeh'],
+    sourceRepo: 'aws/some-repo',
+    maxWorkers: '500',
+  });
+
+  const outdir = Testing.synth(repo);
+  expect(outdir['.github/workflows/integ.yml']).toContain('run: bin/run-suite --maxWorkers=500 --use-cli-release=');
+});