pkg/dds/test/dap/integration/debug_attach_test.dart

// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:test/test.dart';

import 'test_client.dart';
import 'test_scripts.dart';
import 'test_support.dart';

main() {
  group('debug mode', () {
    late DapTestSession dap;
    setUp(() async {
      dap = await DapTestSession.setUp();
    });
    tearDown(() => dap.tearDown());

    test('can attach to a simple script using vmServiceUri', () async {
      final testFile = dap.createTestFile(simpleArgPrintingProgram);

      final args = ['one', 'two'];
      final proc = await startDartProcessPaused(
        testFile.path,
        args,
        cwd: dap.testAppDir.path,
      );
      final vmServiceUri = await waitForStdoutVmServiceBanner(proc);

      final outputEvents = await dap.client.collectOutput(
        launch: () => dap.client.attach(
          vmServiceUri: vmServiceUri.toString(),
          cwd: dap.testAppDir.path,
        ),
      );

      // Expect a "console" output event that prints the URI of the VM Service
      // the debugger connects to.
      final vmConnection = outputEvents.first;
      expect(vmConnection.output,
          startsWith('Connecting to VM Service at ws://127.0.0.1:'));
      expect(vmConnection.category, equals('console'));

      // Expect the normal applications output.
      final output = outputEvents
          .skip(1)
          .map((e) => e.output)
          // The stdout also contains the Observatory+DevTools banners.
          .where(
            (line) =>
                !line.startsWith('Observatory listening on') &&
                !line.startsWith(
                    'The Dart DevTools debugger and profiler is available at'),
          )
          .join();
      expectLines(output, [
        'Hello!',
        'World!',
        'args: [one, two]',
        '',
        'Exited.',
      ]);
    });
    // These tests can be slow due to starting up the external server process.
  }, timeout: Timeout.none);
}