| // 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. |
| |
| import "dart:async"; |
| import "package:unittest/unittest.dart"; |
| |
| main() { |
| const ms5 = const Duration(milliseconds: 5); |
| const twoSecs = const Duration(seconds: 2); |
| |
| test("stream timeout", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(ms5); |
| expect(tos.isBroadcast, false); |
| tos.handleError(expectAsync((e, s) { |
| expect(e, new isInstanceOf<TimeoutException>()); |
| expect(s, null); |
| })).listen((v) { |
| fail("Unexpected event"); |
| }); |
| }); |
| |
| test("stream timeout add events", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(ms5, onTimeout: (sink) { |
| sink.add(42); |
| sink.addError("ERROR"); |
| sink.close(); |
| }); |
| expect(tos.isBroadcast, false); |
| tos.listen(expectAsync((v) { |
| expect(v, 42); |
| }), onError: expectAsync((e, s) { |
| expect(e, "ERROR"); |
| }), onDone: expectAsync(() {})); |
| }); |
| |
| test("stream no timeout", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(twoSecs); |
| int ctr = 0; |
| tos.listen((v) { |
| expect(v, 42); |
| ctr++; |
| }, onError: (e, s) { |
| fail("No error expected"); |
| }, onDone: expectAsync(() { |
| expect(ctr, 2); |
| })); |
| expect(tos.isBroadcast, false); |
| c |
| ..add(42) |
| ..add(42) |
| ..close(); // Faster than a timeout! |
| }); |
| |
| test("stream timeout after events", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(twoSecs); |
| expect(tos.isBroadcast, false); |
| int ctr = 0; |
| tos.listen((v) { |
| expect(v, 42); |
| ctr++; |
| }, onError: expectAsync((e, s) { |
| expect(ctr, 2); |
| expect(e, new isInstanceOf<TimeoutException>()); |
| })); |
| c..add(42)..add(42); // No close, timeout after two events. |
| }); |
| |
| test("broadcast stream timeout", () { |
| StreamController c = new StreamController.broadcast(); |
| Stream tos = c.stream.timeout(ms5); |
| expect(tos.isBroadcast, true); |
| tos.handleError(expectAsync((e, s) { |
| expect(e, new isInstanceOf<TimeoutException>()); |
| expect(s, null); |
| })).listen((v) { |
| fail("Unexpected event"); |
| }); |
| }); |
| |
| test("asBroadcast stream timeout", () { |
| StreamController c = new StreamController.broadcast(); |
| Stream tos = c.stream.asBroadcastStream().timeout(ms5); |
| expect(tos.isBroadcast, true); |
| tos.handleError(expectAsync((e, s) { |
| expect(e, new isInstanceOf<TimeoutException>()); |
| expect(s, null); |
| })).listen((v) { |
| fail("Unexpected event"); |
| }); |
| }); |
| |
| test("mapped stream timeout", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.map((x) => 2 * x).timeout(ms5); |
| expect(tos.isBroadcast, false); |
| tos.handleError(expectAsync((e, s) { |
| expect(e, new isInstanceOf<TimeoutException>()); |
| expect(s, null); |
| })).listen((v) { |
| fail("Unexpected event"); |
| }); |
| }); |
| |
| test("events prevent timeout", () { |
| Stopwatch sw = new Stopwatch(); |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(twoSecs, onTimeout: (_) { |
| int elapsed = sw.elapsedMilliseconds; |
| if (elapsed > 250) { |
| // This should not happen, but it does occasionally. |
| // Starving the periodic timer has made the test useless. |
| print("Periodic timer of 5 ms delayed $elapsed ms."); |
| return; |
| } |
| fail("Timeout not prevented by events"); |
| throw "ERROR"; |
| }); |
| // Start the periodic timer before we start listening to the stream. |
| // This should reduce the flakiness of the test. |
| int ctr = 200; // send this many events at 5ms intervals. Then close. |
| new Timer.periodic(ms5, (timer) { |
| sw.reset(); |
| c.add(42); |
| if (--ctr == 0) { |
| timer.cancel(); |
| c.close(); |
| } |
| }); |
| sw.start(); |
| |
| tos.listen((v) { |
| expect(v, 42); |
| }, onDone: expectAsync(() {})); |
| }); |
| |
| test("errors prevent timeout", () { |
| Stopwatch sw = new Stopwatch(); |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(twoSecs, onTimeout: (_) { |
| int elapsed = sw.elapsedMilliseconds; |
| if (elapsed > 250) { |
| // This should not happen, but it does occasionally. |
| // Starving the periodic timer has made the test useless. |
| print("Periodic timer of 5 ms delayed $elapsed ms."); |
| return; |
| } |
| fail("Timeout not prevented by errors"); |
| }); |
| |
| // Start the periodic timer before we start listening to the stream. |
| // This should reduce the flakiness of the test. |
| int ctr = 200; // send this many error events at 5ms intervals. Then close. |
| new Timer.periodic(ms5, (timer) { |
| sw.reset(); |
| c.addError("ERROR"); |
| if (--ctr == 0) { |
| timer.cancel(); |
| c.close(); |
| } |
| }); |
| sw.start(); |
| |
| tos.listen((_) {}, onError: (e, s) { |
| expect(e, "ERROR"); |
| }, onDone: expectAsync(() {})); |
| }); |
| |
| test("closing prevents timeout", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(twoSecs, onTimeout: (_) { |
| fail("Timeout not prevented by close"); |
| }); |
| tos.listen((_) {}, onDone: expectAsync(() {})); |
| c.close(); |
| }); |
| |
| test("pausing prevents timeout", () { |
| StreamController c = new StreamController(); |
| Stream tos = c.stream.timeout(ms5, onTimeout: (_) { |
| fail("Timeout not prevented by close"); |
| }); |
| var subscription = tos.listen((_) {}, onDone: expectAsync(() {})); |
| subscription.pause(); |
| new Timer(twoSecs, () { |
| c.close(); |
| subscription.resume(); |
| }); |
| }); |
| } |