fix(core): normalize mixed pool CLI options

e2e/cli/index.test.ts

@@ -70,6 +70,30 @@ describe.concurrent('test exit code', () => {
     await expectExecSuccess();
   });
 
+  it('should support --pool shorthand with nested pool options', async ({
+    onTestFinished,
+  }) => {
+    const { expectExecSuccess } = await runRstestCli({
+      command: 'rstest',
+      args: [
+        'run',
+        'success.test.ts',
+        '--pool',
+        'forks',
+        '--pool.maxWorkers',
+        '1',
+      ],
+      onTestFinished,
+      options: {
+        nodeOptions: {
+          cwd: __dirname,
+        },
+      },
+    });
+
+    await expectExecSuccess();
+  });
+
   it('should return code 1 and print error correctly when test config error', async ({
     onTestFinished,
   }) => {

packages/core/src/cli/commands.ts

@@ -220,12 +220,34 @@ const normalizeCoverageCliArgs = (argv: string[]): string[] => {
   });
 };
 
-const allowMixedCoverageCliOptions = (cli: CAC): void => {
+const normalizePoolCliArgs = (argv: string[]): string[] => {
+  const hasPoolNestedOption = argv.some((arg) => arg.startsWith('--pool.'));
+
+  if (!hasPoolNestedOption) {
+    return argv;
+  }
+
+  return argv.map((arg) => {
+    if (arg === '--pool') {
+      return '--pool.type';
+    }
+    if (arg.startsWith('--pool=')) {
+      return `--pool.type=${arg.slice('--pool='.length)}`;
+    }
+
+    return arg;
+  });
+};
+
+const normalizeCliArgs = (argv: string[]): string[] =>
+  normalizePoolCliArgs(normalizeCoverageCliArgs(argv));
+
+const normalizeMixedCliOptions = (cli: CAC): void => {
   const originalParse = cli.parse.bind(cli);
 
   cli.parse = ((argv, options) =>
     originalParse(
-      normalizeCoverageCliArgs(argv ?? process.argv),
+      normalizeCliArgs(argv ?? process.argv),
       options,
     )) as CAC['parse'];
 };
@@ -861,7 +883,7 @@ export function createCli(): CAC {
       }
     });
 
-  allowMixedCoverageCliOptions(cli);
+  normalizeMixedCliOptions(cli);
 
   return cli;
 }

packages/core/tests/cli/commands.test.ts

@@ -80,6 +80,18 @@ describe('CLI help output', () => {
       changed: 'HEAD',
     });
   });
+
+  it('allows --pool shorthand to be mixed with nested pool options', () => {
+    const parsed = createCli().parse(
+      ['node', 'rstest', 'run', '--pool', 'forks', '--pool.maxWorkers', '1'],
+      { run: false },
+    );
+
+    expect(parsed.options.pool).toEqual({
+      type: 'forks',
+      maxWorkers: 1,
+    });
+  });
 });
 
 describe('normalizeCliFilters', () => {