| // Copyright (c) 2013, 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 = 2.9 |
| |
| import 'package:async_helper/async_helper.dart'; |
| import "package:expect/expect.dart"; |
| import 'dart:async'; |
| import 'catch_errors.dart'; |
| |
| main() { |
| asyncStart(); |
| Completer done = new Completer(); |
| |
| var events = []; |
| var controller = new StreamController(); |
| // Test that stream errors, as a result of bad user-code (`map`) are correctly |
| // caught by `catchErrors`. Note that the values are added outside both |
| // `catchErrors`, but since the `listen` happens in the most nested |
| // `catchErrors` it is caught there. |
| catchErrors(() { |
| catchErrors(() { |
| controller.stream.map((x) { |
| throw x; |
| }).listen((x) { |
| // Should not happen. |
| events.add("bad: $x"); |
| }); |
| }).listen((x) { |
| events.add("caught: $x"); |
| if (x == 4) done.complete(true); |
| }, onDone: () { |
| Expect.fail("Unexpected callback"); |
| }); |
| }).listen((x) { |
| events.add("outer: $x"); |
| }, onDone: () { |
| Expect.fail("Unexpected callback"); |
| }); |
| |
| done.future.whenComplete(() { |
| // Give handlers time to run. |
| Timer.run(() { |
| Expect.listEquals([ |
| "caught: 1", |
| "caught: 2", |
| "caught: 3", |
| "caught: 4", |
| ], events); |
| asyncEnd(); |
| }); |
| }); |
| |
| [1, 2, 3, 4].forEach(controller.add); |
| controller.close(); |
| } |