| /* |
| * Copyright (c) 2011, 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. |
| */ |
| /** |
| * @assertion Stream<T> handleError(Function onError, {bool test(error)}) |
| * The onError callback must be of type void onError(error) or |
| * void onError(error, StackTrace stackTrace). Depending on the function type |
| * the the stream either invokes onError with or without a stack trace. The |
| * stack trace argument might be null if the stream itself received an error |
| * without stack trace. |
| * @description Checks that onError callback with two parameters can be used |
| * in which case the second parameter is a stack trace. |
| * @author ilya |
| */ |
| import "dart:async"; |
| import "../../../Utils/expect.dart"; |
| |
| const N = 10; |
| |
| main() { |
| Stream s = new Stream.fromIterable(new Iterable.generate(N, (x) => x)); |
| |
| List errors = []; |
| List stackTraces = []; |
| Stream s2 = s.map((event) { |
| try { |
| throw new Error(); |
| } catch(e, st) { |
| errors.add(e); |
| stackTraces.add(st); |
| rethrow; // error and stack trace are the same as e and st |
| } |
| }); |
| |
| Stream s3 = s2.handleError((e, st) { |
| Expect.identical(errors.removeAt(0), e); |
| Expect.identical(stackTraces.removeAt(0), st); |
| asyncEnd(); |
| }); |
| |
| asyncMultiStart(N); |
| |
| s3.listen((_) { |
| Expect.fail('unexpected onData event'); |
| }, onError:(_) { |
| Expect.fail('unexpected onError event'); |
| }); |
| } |