test/run/enable_experiments_test.dart

// Copyright (c) 2014, 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 '../descriptor.dart' as d;
import '../test_pub.dart';

void main() {
  test('Succeeds running experimental code.', () async {
    await d.dir(appPath, [
      d.pubspec({
        'name': 'myapp',
        'environment': {'sdk': '>=2.10.0 <=3.0.0'},
      }),
      d.dir('bin', [
        d.file('script.dart', '''
  main() {
    int? a = int.tryParse('123');
  }
''')
      ])
    ]).create();
    await pubGet(environment: {'_PUB_TEST_SDK_VERSION': '2.10.0'});
    await runPub(
      args: ['run', '--enable-experiment=non-nullable', 'bin/script.dart'],
      environment: {'_PUB_TEST_SDK_VERSION': '2.10.0'},
    );
  });

  test('Passes --no-sound-null-safety to the vm', () async {
    const vmWithExperiment = '2.11.0';

    await d.dir(appPath, [
      d.pubspec({
        'name': 'test_package',
        'environment': {'sdk': '>=$vmWithExperiment <=3.0.0'}
      }),
      d.dir('bin', [
        d.file('script.dart', '''
import 'package:test_package/foo.dart';

main() {
  int? a = int.tryParse('123');
  int b = p;
}
''')
      ]),
      d.dir(
        'lib',
        [
          d.file('foo.dart', '''
// @dart = 2.8
int p = 10;
'''),
        ],
      ),
    ]).create();

    const environment = {'_PUB_TEST_SDK_VERSION': vmWithExperiment};

    await pubGet(environment: environment);
    await runPub(args: [
      'run',
      '--no-sound-null-safety',
      '--enable-experiment=non-nullable',
      'bin/script.dart'
    ], environment: environment);
    await runPub(
      args: ['run', '--enable-experiment=non-nullable', 'bin/script.dart'],
      environment: environment,
      error: contains("A library can't opt out of null safety by default"),
      exitCode: 254,
    );
  });
}