| // Copyright (c) 2017, 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. |
| |
| // @dart = 2.7 |
| |
| /// Tests that dart2js allows to import dart:io for web clients, but it |
| /// continues to indicate that it is not supported (so config-specific imports |
| /// continue to have the same semantics as before). |
| library unconditional_dartio_import_test; |
| |
| import 'dart:io' as io; // import is allowed! |
| import 'package:expect/expect.dart'; |
| |
| main() { |
| // their APIs throw: |
| Expect.throws(() => new io.File('name').existsSync()); |
| |
| // ... but environment variable will indicate it is not supported. |
| Expect.isFalse(const bool.fromEnvironment('dart.library.io')); |
| } |