Index: test/isolate_channel_test.dart |
diff --git a/test/isolate_channel_test.dart b/test/isolate_channel_test.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..9e4fddc954989332717118b62866081f0041ff85 |
--- /dev/null |
+++ b/test/isolate_channel_test.dart |
@@ -0,0 +1,126 @@ |
+// Copyright (c) 2016, 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 'dart:isolate'; |
+ |
+import 'package:stream_channel/stream_channel.dart'; |
+import 'package:test/test.dart'; |
+ |
+import 'utils.dart'; |
+ |
+void main() { |
+ var receivePort; |
+ var sendPort; |
+ var channel; |
+ setUp(() { |
+ receivePort = new ReceivePort(); |
+ var receivePortForSend = new ReceivePort(); |
+ sendPort = receivePortForSend.sendPort; |
+ channel = new IsolateChannel(receivePortForSend, receivePort.sendPort); |
+ }); |
+ |
+ tearDown(() { |
+ receivePort.close(); |
+ channel.sink.close(); |
+ }); |
+ |
+ test("the channel can send messages", () { |
+ channel.sink.add(1); |
+ channel.sink.add(2); |
+ channel.sink.add(3); |
+ |
+ expect(receivePort.take(3).toList(), completion(equals([1, 2, 3]))); |
+ }); |
+ |
+ test("the channel can receive messages", () { |
+ sendPort.send(1); |
+ sendPort.send(2); |
+ sendPort.send(3); |
+ |
+ expect(channel.stream.take(3).toList(), completion(equals([1, 2, 3]))); |
+ }); |
+ |
+ test("events can't be added to an explicitly-closed sink", () { |
+ expect(channel.sink.close(), completes); |
+ expect(() => channel.sink.add(1), throwsStateError); |
+ expect(() => channel.sink.addError("oh no"), throwsStateError); |
+ expect(() => channel.sink.addStream(new Stream.fromIterable([])), |
+ throwsStateError); |
+ }); |
+ |
+ test("events can't be added while a stream is being added", () { |
+ var controller = new StreamController(); |
+ channel.sink.addStream(controller.stream); |
+ |
+ expect(() => channel.sink.add(1), throwsStateError); |
+ expect(() => channel.sink.addError("oh no"), throwsStateError); |
+ expect(() => channel.sink.addStream(new Stream.fromIterable([])), |
+ throwsStateError); |
+ expect(() => channel.sink.close(), throwsStateError); |
+ |
+ controller.close(); |
+ }); |
+ |
+ group("stream channel rules", () { |
+ test("closing the sink causes the stream to close before it emits any more " |
+ "events", () { |
+ sendPort.send(1); |
+ sendPort.send(2); |
+ sendPort.send(3); |
+ sendPort.send(4); |
+ sendPort.send(5); |
+ |
+ channel.stream.listen(expectAsync((message) { |
+ expect(message, equals(1)); |
+ channel.sink.close(); |
+ }, count: 1)); |
+ }); |
+ |
+ test("cancelling the stream's subscription has no effect on the sink", |
+ () async { |
+ channel.stream.listen(null).cancel(); |
+ await pumpEventQueue(); |
+ |
+ channel.sink.add(1); |
+ channel.sink.add(2); |
+ channel.sink.add(3); |
+ expect(receivePort.take(3).toList(), completion(equals([1, 2, 3]))); |
+ }); |
+ |
+ test("the sink closes as soon as an error is added", () async { |
+ channel.sink.addError("oh no"); |
+ channel.sink.add(1); |
+ expect(channel.sink.done, throwsA("oh no")); |
+ |
+ // Since the sink is closed, the stream should also be closed. |
+ expect(channel.stream.isEmpty, completion(isTrue)); |
+ |
+ // The other end shouldn't receive the next event, since the sink was |
+ // closed. Pump the event queue to give it a chance to. |
+ receivePort.listen(expectAsync((_) {}, count: 0)); |
+ await pumpEventQueue(); |
+ }); |
+ |
+ test("the sink closes as soon as an error is added via addStream", |
+ () async { |
+ var canceled = false; |
+ var controller = new StreamController(onCancel: () { |
+ canceled = true; |
+ }); |
+ |
+ // This future shouldn't get the error, because it's sent to [Sink.done]. |
+ expect(channel.sink.addStream(controller.stream), completes); |
+ |
+ controller.addError("oh no"); |
+ expect(channel.sink.done, throwsA("oh no")); |
+ await pumpEventQueue(); |
+ expect(canceled, isTrue); |
+ |
+ // Even though the sink is closed, this shouldn't throw an error because |
+ // the user didn't explicitly close it. |
+ channel.sink.add(1); |
+ }); |
+ }); |
+} |