lrn@google.com
5cbd1e05e2
The close method on StreamConsumer, StreamSink and StreamController do not explain the returned future or say when it is completed. Listening on a closed broadcast stream should not throw, but just give a subscription that sends a done asap. BUG= http://dartbug.com/19095 R=ajohnsen@google.com Review URL: https://codereview.chromium.org//301193010 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@36862 260f80e4-7a28-3924-810f-c04153c831b5
773 lines
23 KiB
Dart
773 lines
23 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test the basic StreamController and StreamController.broadcast.
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library stream_controller_async_test;
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import 'dart:async';
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import 'dart:isolate';
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import "package:expect/expect.dart";
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import 'package:unittest/unittest.dart';
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import 'event_helper.dart';
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import 'stream_state_helper.dart';
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void cancelSub(StreamSubscription sub) { sub.cancel(); }
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testController() {
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// Test fold
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test("StreamController.fold", () {
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StreamController c = new StreamController();
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Stream stream = c.stream.asBroadcastStream(onCancel: cancelSub);
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stream.fold(0, (a,b) => a + b)
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.then(expectAsync((int v) {
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Expect.equals(42, v);
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}));
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c.add(10);
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c.add(32);
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c.close();
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});
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test("StreamController.fold throws", () {
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StreamController c = new StreamController();
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Stream stream = c.stream.asBroadcastStream(onCancel: cancelSub);
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stream.fold(0, (a,b) { throw "Fnyf!"; })
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.catchError(expectAsync((error) { Expect.equals("Fnyf!", error); }));
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c.add(42);
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});
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}
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testSingleController() {
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test("Single-subscription StreamController.fold", () {
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StreamController c = new StreamController();
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Stream stream = c.stream;
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stream.fold(0, (a,b) => a + b)
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.then(expectAsync((int v) { Expect.equals(42, v); }));
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c.add(10);
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c.add(32);
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c.close();
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});
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test("Single-subscription StreamController.fold throws", () {
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StreamController c = new StreamController();
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Stream stream = c.stream;
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stream.fold(0, (a,b) { throw "Fnyf!"; })
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.catchError(expectAsync((e) { Expect.equals("Fnyf!", e); }));
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c.add(42);
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});
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test("Single-subscription StreamController events are buffered when"
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" there is no subscriber",
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() {
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StreamController c = new StreamController();
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EventSink sink = c.sink;
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Stream stream = c.stream;
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int counter = 0;
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sink.add(1);
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sink.add(2);
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sink.close();
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stream.listen(
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(data) {
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counter += data;
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},
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onDone: expectAsync(() {
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Expect.equals(3, counter);
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}));
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});
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}
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testExtraMethods() {
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Events sentEvents = new Events()..add(7)..add(9)..add(13)..add(87)..close();
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test("forEach", () {
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StreamController c = new StreamController();
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Events actualEvents = new Events();
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Future f = c.stream.forEach(actualEvents.add);
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f.then(expectAsync((_) {
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actualEvents.close();
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Expect.listEquals(sentEvents.events, actualEvents.events);
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}));
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sentEvents.replay(c);
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});
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test("forEachError", () {
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Events sentEvents = new Events()..add(7)..error("bad")..add(87)..close();
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StreamController c = new StreamController();
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Events actualEvents = new Events();
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Future f = c.stream.forEach(actualEvents.add);
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f.catchError(expectAsync((error) {
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Expect.equals("bad", error);
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Expect.listEquals((new Events()..add(7)).events, actualEvents.events);
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}));
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sentEvents.replay(c);
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});
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test("forEachError2", () {
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Events sentEvents = new Events()..add(7)..add(9)..add(87)..close();
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StreamController c = new StreamController();
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Events actualEvents = new Events();
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Future f = c.stream.forEach((x) {
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if (x == 9) throw "bad";
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actualEvents.add(x);
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});
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f.catchError(expectAsync((error) {
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Expect.equals("bad", error);
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Expect.listEquals((new Events()..add(7)).events, actualEvents.events);
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}));
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sentEvents.replay(c);
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});
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test("firstWhere", () {
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StreamController c = new StreamController();
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Future f = c.stream.firstWhere((x) => (x % 3) == 0);
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f.then(expectAsync((v) { Expect.equals(9, v); }));
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sentEvents.replay(c);
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});
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test("firstWhere 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.firstWhere((x) => (x % 4) == 0);
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f.catchError(expectAsync((e) {}));
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sentEvents.replay(c);
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});
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test("firstWhere 3", () {
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StreamController c = new StreamController();
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Future f = c.stream.firstWhere((x) => (x % 4) == 0, defaultValue: () => 999);
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f.then(expectAsync((v) { Expect.equals(999, v); }));
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sentEvents.replay(c);
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});
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test("lastWhere", () {
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StreamController c = new StreamController();
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Future f = c.stream.lastWhere((x) => (x % 3) == 0);
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f.then(expectAsync((v) { Expect.equals(87, v); }));
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sentEvents.replay(c);
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});
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test("lastWhere 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.lastWhere((x) => (x % 4) == 0);
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f.catchError(expectAsync((e) {}));
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sentEvents.replay(c);
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});
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test("lastWhere 3", () {
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StreamController c = new StreamController();
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Future f = c.stream.lastWhere((x) => (x % 4) == 0, defaultValue: () => 999);
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f.then(expectAsync((v) { Expect.equals(999, v); }));
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sentEvents.replay(c);
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});
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test("singleWhere", () {
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StreamController c = new StreamController();
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Future f = c.stream.singleWhere((x) => (x % 9) == 0);
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f.then(expectAsync((v) { Expect.equals(9, v); }));
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sentEvents.replay(c);
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});
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test("singleWhere 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.singleWhere((x) => (x % 3) == 0); // Matches 9 and 87..
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f.catchError(expectAsync((error) { Expect.isTrue(error is StateError); }));
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sentEvents.replay(c);
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});
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test("first", () {
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StreamController c = new StreamController();
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Future f = c.stream.first;
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f.then(expectAsync((v) { Expect.equals(7, v);}));
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sentEvents.replay(c);
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});
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test("first empty", () {
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StreamController c = new StreamController();
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Future f = c.stream.first;
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f.catchError(expectAsync((error) { Expect.isTrue(error is StateError); }));
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Events emptyEvents = new Events()..close();
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emptyEvents.replay(c);
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});
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test("first error", () {
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StreamController c = new StreamController();
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Future f = c.stream.first;
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f.catchError(expectAsync((error) { Expect.equals("error", error); }));
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Events errorEvents = new Events()..error("error")..close();
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errorEvents.replay(c);
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});
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test("first error 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.first;
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f.catchError(expectAsync((error) { Expect.equals("error", error); }));
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Events errorEvents = new Events()..error("error")..error("error2")..close();
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errorEvents.replay(c);
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});
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test("last", () {
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StreamController c = new StreamController();
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Future f = c.stream.last;
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f.then(expectAsync((v) { Expect.equals(87, v);}));
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sentEvents.replay(c);
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});
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test("last empty", () {
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StreamController c = new StreamController();
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Future f = c.stream.last;
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f.catchError(expectAsync((error) { Expect.isTrue(error is StateError); }));
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Events emptyEvents = new Events()..close();
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emptyEvents.replay(c);
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});
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test("last error", () {
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StreamController c = new StreamController();
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Future f = c.stream.last;
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f.catchError(expectAsync((error) { Expect.equals("error", error); }));
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Events errorEvents = new Events()..error("error")..close();
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errorEvents.replay(c);
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});
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test("last error 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.last;
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f.catchError(expectAsync((error) { Expect.equals("error", error); }));
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Events errorEvents = new Events()..error("error")..error("error2")..close();
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errorEvents.replay(c);
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});
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test("elementAt", () {
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StreamController c = new StreamController();
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Future f = c.stream.elementAt(2);
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f.then(expectAsync((v) { Expect.equals(13, v);}));
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sentEvents.replay(c);
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});
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test("elementAt 2", () {
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StreamController c = new StreamController();
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Future f = c.stream.elementAt(20);
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f.catchError(expectAsync((error) { Expect.isTrue(error is RangeError); }));
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sentEvents.replay(c);
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});
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test("drain", () {
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StreamController c = new StreamController();
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Future f = c.stream.drain();
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f.then(expectAsync((v) { Expect.equals(null, v);}));
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sentEvents.replay(c);
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});
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test("drain error", () {
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StreamController c = new StreamController();
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Future f = c.stream.drain();
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f.catchError(expectAsync((error) { Expect.equals("error", error); }));
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Events errorEvents = new Events()..error("error")..error("error2")..close();
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errorEvents.replay(c);
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});
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}
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testPause() {
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test("pause event-unpause", () {
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StreamProtocolTest test = new StreamProtocolTest();
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Completer completer = new Completer();
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test..expectListen()
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..expectData(42, () { test.pause(completer.future); })
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..expectPause(() {
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completer.complete(null);
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})
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..expectData(43)
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..expectData(44)
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..expectCancel()
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..expectDone(test.terminate);
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test.listen();
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test.add(42);
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test.add(43);
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test.add(44);
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test.close();
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});
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test("pause twice event-unpause", () {
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StreamProtocolTest test = new StreamProtocolTest();
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Completer completer = new Completer();
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Completer completer2 = new Completer();
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test..expectListen()
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..expectData(42, () {
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test.pause(completer.future);
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test.pause(completer2.future);
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})
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..expectPause(() {
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completer.future.then(completer2.complete);
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completer.complete(null);
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})
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..expectData(43)
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..expectData(44)
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..expectCancel()
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..expectDone(test.terminate);
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test..listen()
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..add(42)
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..add(43)
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..add(44)
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..close();
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});
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test("pause twice direct-unpause", () {
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StreamProtocolTest test = new StreamProtocolTest();
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test..expectListen()
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..expectData(42, () {
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test.pause();
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test.pause();
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})
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..expectPause(() {
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test.resume();
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test.resume();
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})
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..expectData(43)
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..expectData(44)
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..expectCancel()
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..expectDone(test.terminate);
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test..listen()
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..add(42)
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..add(43)
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..add(44)
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..close();
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});
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test("pause twice direct-event-unpause", () {
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StreamProtocolTest test = new StreamProtocolTest();
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Completer completer = new Completer();
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test..expectListen()
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..expectData(42, () {
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test.pause();
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test.pause(completer.future);
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test.add(43);
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test.add(44);
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test.close();
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})
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..expectPause(() {
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completer.future.then((v) => test.resume());
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completer.complete(null);
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})
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..expectData(43)
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..expectData(44)
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..expectCancel()
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..expectDone(test.terminate);
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test..listen()
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..add(42);
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});
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}
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class TestError { const TestError(); }
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testRethrow() {
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TestError error = const TestError();
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testStream(name, streamValueTransform) {
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test("rethrow-$name-value", () {
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StreamController c = new StreamController();
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Stream s = streamValueTransform(c.stream, (v) { throw error; });
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s.listen((_) { Expect.fail("unexpected value"); }, onError: expectAsync(
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(e) { Expect.identical(error, e); }));
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c.add(null);
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c.close();
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});
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}
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testStreamError(name, streamErrorTransform) {
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test("rethrow-$name-error", () {
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StreamController c = new StreamController();
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Stream s = streamErrorTransform(c.stream, (e) { throw error; });
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s.listen((_) { Expect.fail("unexpected value"); }, onError: expectAsync(
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(e) { Expect.identical(error, e); }));
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c.addError(null);
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c.close();
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});
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}
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testFuture(name, streamValueTransform) {
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test("rethrow-$name-value", () {
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StreamController c = new StreamController();
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Future f = streamValueTransform(c.stream, (v) { throw error; });
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f.then((v) { Expect.fail("unreachable"); },
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onError: expectAsync((e) { Expect.identical(error, e); }));
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// Need two values to trigger compare for reduce.
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c.add(0);
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c.add(1);
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c.close();
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});
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}
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testStream("where", (s, act) => s.where(act));
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testStream("map", (s, act) => s.map(act));
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testStream("expand", (s, act) => s.expand(act));
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testStream("where", (s, act) => s.where(act));
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testStreamError("handleError", (s, act) => s.handleError(act));
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testStreamError("handleTest", (s, act) => s.handleError((v) {}, test: act));
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testFuture("forEach", (s, act) => s.forEach(act));
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testFuture("every", (s, act) => s.every(act));
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testFuture("any", (s, act) => s.any(act));
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testFuture("reduce", (s, act) => s.reduce((a,b) => act(b)));
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testFuture("fold", (s, act) => s.fold(0, (a,b) => act(b)));
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testFuture("drain", (s, act) => s.drain().then(act));
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}
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void testBroadcastController() {
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test("broadcast-controller-basic", () {
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StreamProtocolTest test = new StreamProtocolTest.broadcast();
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test..expectListen()
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..expectData(42)
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..expectCancel()
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..expectDone(test.terminate);
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test..listen()
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..add(42)
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..close();
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});
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test("broadcast-controller-listen-twice", () {
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StreamProtocolTest test = new StreamProtocolTest.broadcast();
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test..expectListen()
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..expectData(42, () {
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test.listen();
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test.add(37);
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test.close();
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})
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// Order is not guaranteed between subscriptions if not sync.
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..expectData(37)
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..expectData(37)
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..expectDone()
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..expectCancel()
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..expectDone(test.terminate);
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test.listen();
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test.add(42);
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});
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test("broadcast-controller-listen-twice-non-overlap", () {
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StreamProtocolTest test = new StreamProtocolTest.broadcast();
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test
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..expectListen(() {
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test.add(42);
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})
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..expectData(42, () {
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test.cancel();
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})
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..expectCancel(() {
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test.listen();
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})..expectListen(() {
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test.add(37);
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})
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..expectData(37, () {
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test.close();
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})
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..expectCancel()
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..expectDone(test.terminate);
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test.listen();
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});
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test("broadcast-controller-individual-pause", () {
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StreamProtocolTest test = new StreamProtocolTest.broadcast();
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var sub1;
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test..expectListen()
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..expectData(42)
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..expectData(42, () { sub1.pause(); })
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..expectData(43, () {
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sub1.cancel();
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test.listen();
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test.add(44);
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test.expectData(44);
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test.expectData(44, test.terminate);
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});
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sub1 = test.listen();
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test.listen();
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test.add(42);
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test.add(43);
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});
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test("broadcast-controller-add-in-callback", () {
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StreamProtocolTest test = new StreamProtocolTest.broadcast();
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test.expectListen();
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var sub = test.listen();
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test.add(42);
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sub.expectData(42, () {
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test.add(87);
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sub.cancel();
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});
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test.expectCancel(() {
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test.add(37);
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test.terminate();
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});
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});
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}
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void testAsBroadcast() {
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test("asBroadcast-not-canceled", () {
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StreamProtocolTest test = new StreamProtocolTest.asBroadcast();
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var sub;
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test..expectListen()
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..expectBroadcastListen((_) {
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test.add(42);
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})
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..expectData(42, () {
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sub.cancel();
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})
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..expectBroadcastCancel((_) {
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sub = test.listen();
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})
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..expectBroadcastListen((_) {
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test.terminate();
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});
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sub = test.listen();
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});
|
|
|
|
test("asBroadcast-canceled", () {
|
|
StreamProtocolTest test = new StreamProtocolTest.asBroadcast();
|
|
var sub;
|
|
test..expectListen()
|
|
..expectBroadcastListen((_) {
|
|
test.add(42);
|
|
})
|
|
..expectData(42, () {
|
|
sub.cancel();
|
|
})
|
|
..expectBroadcastCancel((originalSub) {
|
|
originalSub.cancel();
|
|
})
|
|
..expectCancel(test.terminate);
|
|
sub = test.listen();
|
|
});
|
|
|
|
test("asBroadcast-pause-original", () {
|
|
StreamProtocolTest test = new StreamProtocolTest.asBroadcast();
|
|
var sub;
|
|
test..expectListen()
|
|
..expectBroadcastListen((_) {
|
|
test.add(42);
|
|
test.add(43);
|
|
})
|
|
..expectData(42, () {
|
|
sub.cancel();
|
|
})
|
|
..expectBroadcastCancel((originalSub) {
|
|
originalSub.pause(); // Pause before sending 43 from original sub.
|
|
})
|
|
..expectPause(() {
|
|
sub = test.listen();
|
|
})
|
|
..expectBroadcastListen((originalSub) {
|
|
originalSub.resume();
|
|
})
|
|
..expectData(43)
|
|
..expectResume(() {
|
|
test.close();
|
|
})
|
|
..expectCancel()
|
|
..expectDone()
|
|
..expectBroadcastCancel((_) => test.terminate());
|
|
sub = test.listen();
|
|
});
|
|
}
|
|
|
|
void testSink({bool sync, bool broadcast, bool asBroadcast}) {
|
|
String type = "${sync?"S":"A"}${broadcast?"B":"S"}${asBroadcast?"aB":""}";
|
|
test("$type-controller-sink", () {
|
|
var done = expectAsync((){});
|
|
var c = broadcast ? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
var expected = new Events()
|
|
..add(42)..error("error")
|
|
..add(1)..add(2)..add(3)..add(4)..add(5)
|
|
..add(43)..close();
|
|
var actual = new Events.capture(asBroadcast ? c.stream.asBroadcastStream()
|
|
: c.stream);
|
|
var sink = c.sink;
|
|
sink.add(42);
|
|
sink.addError("error");
|
|
sink.addStream(new Stream.fromIterable([1, 2, 3, 4, 5]))
|
|
.then((_) {
|
|
sink.add(43);
|
|
return sink.close();
|
|
})
|
|
.then((_) {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
});
|
|
});
|
|
|
|
test("$type-controller-sink-canceled", () {
|
|
var done = expectAsync((){});
|
|
var c = broadcast ? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
var expected = new Events()
|
|
..add(42)..error("error")
|
|
..add(1)..add(2)..add(3);
|
|
var stream = asBroadcast ? c.stream.asBroadcastStream() : c.stream;
|
|
var actual = new Events();
|
|
var sub;
|
|
// Cancel subscription after receiving "3" event.
|
|
sub = stream.listen((v) {
|
|
if (v == 3) sub.cancel();
|
|
actual.add(v);
|
|
}, onError: actual.error);
|
|
var sink = c.sink;
|
|
sink.add(42);
|
|
sink.addError("error");
|
|
sink.addStream(new Stream.fromIterable([1, 2, 3, 4, 5]))
|
|
.then((_) {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
// Close controller as well. It has no listener. If it is a broadcast
|
|
// stream, it will still be open, and we read the "done" future before
|
|
// closing. A normal stream is already done when its listener cancels.
|
|
Future doneFuture = sink.done;
|
|
sink.close();
|
|
return doneFuture;
|
|
})
|
|
.then((_) {
|
|
// No change in events.
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
});
|
|
});
|
|
|
|
test("$type-controller-sink-paused", () {
|
|
var done = expectAsync((){});
|
|
var c = broadcast ? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
var expected = new Events()
|
|
..add(42)..error("error")
|
|
..add(1)..add(2)..add(3)
|
|
..add(4)..add(5)..add(43)..close();
|
|
var stream = asBroadcast ? c.stream.asBroadcastStream() : c.stream;
|
|
var actual = new Events();
|
|
var sub;
|
|
var pauseIsDone = false;
|
|
sub = stream.listen(
|
|
(v) {
|
|
if (v == 3) {
|
|
sub.pause(new Future.delayed(const Duration(milliseconds: 15),
|
|
() { pauseIsDone = true; }));
|
|
}
|
|
actual.add(v);
|
|
},
|
|
onError: actual.error,
|
|
onDone: actual.close);
|
|
var sink = c.sink;
|
|
sink.add(42);
|
|
sink.addError("error");
|
|
sink.addStream(new Stream.fromIterable([1, 2, 3, 4, 5]))
|
|
.then((_) {
|
|
sink.add(43);
|
|
return sink.close();
|
|
})
|
|
.then((_) {
|
|
if (asBroadcast || broadcast) {
|
|
// The done-future of the sink completes when it passes
|
|
// the done event to the asBroadcastStream controller, which is
|
|
// before the final listener gets the event.
|
|
// Wait for the done event to be *delivered* before testing the
|
|
// events.
|
|
actual.onDone(() {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
});
|
|
} else {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
}
|
|
});
|
|
});
|
|
|
|
test("$type-controller-addstream-error-stop", () {
|
|
// Check that addStream defaults to ending after the first error.
|
|
var done = expectAsync((){});
|
|
StreamController c = broadcast
|
|
? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
Stream stream = asBroadcast ? c.stream.asBroadcastStream() : c.stream;
|
|
var actual = new Events.capture(stream);
|
|
|
|
var source = new Events();
|
|
source..add(1)..add(2)..error("BAD")..add(3)..error("FAIL")..close();
|
|
|
|
var expected = new Events()..add(1)..add(2)..error("BAD")..close();
|
|
StreamController sourceController = new StreamController();
|
|
c.addStream(sourceController.stream).then((_) {
|
|
c.close().then((_) {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
});
|
|
});
|
|
|
|
source.replay(sourceController);
|
|
});
|
|
|
|
test("$type-controller-addstream-error-forward", () {
|
|
// Check that addStream with cancelOnError:false passes all data and errors
|
|
// to the controller.
|
|
var done = expectAsync((){});
|
|
StreamController c = broadcast
|
|
? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
Stream stream = asBroadcast ? c.stream.asBroadcastStream() : c.stream;
|
|
var actual = new Events.capture(stream);
|
|
|
|
var source = new Events();
|
|
source..add(1)..add(2)..addError("BAD")..add(3)..addError("FAIL")..close();
|
|
|
|
StreamController sourceController = new StreamController();
|
|
c.addStream(sourceController.stream, cancelOnError: false).then((_) {
|
|
c.close().then((_) {
|
|
Expect.listEquals(source.events, actual.events);
|
|
done();
|
|
});
|
|
});
|
|
|
|
source.replay(sourceController);
|
|
});
|
|
|
|
test("$type-controller-addstream-twice", () {
|
|
// Using addStream twice on the same stream
|
|
var done = expectAsync((){});
|
|
StreamController c = broadcast
|
|
? new StreamController.broadcast(sync: sync)
|
|
: new StreamController(sync: sync);
|
|
Stream stream = asBroadcast ? c.stream.asBroadcastStream() : c.stream;
|
|
var actual = new Events.capture(stream);
|
|
|
|
// Streams of five events, throws on 3.
|
|
Stream s1 = new Stream.fromIterable([1,2,3,4,5])
|
|
.map((x) => (x == 3 ? throw x : x));
|
|
Stream s2 = new Stream.fromIterable([1,2,3,4,5])
|
|
.map((x) => (x == 3 ? throw x : x));
|
|
|
|
Events expected = new Events();
|
|
expected..add(1)..add(2)..error(3);
|
|
expected..add(1)..add(2)..error(3)..add(4)..add(5);
|
|
expected..close();
|
|
|
|
c.addStream(s1).then((_) {
|
|
c.addStream(s2, cancelOnError: false).then((_) {
|
|
c.close().then((_) {
|
|
Expect.listEquals(expected.events, actual.events);
|
|
done();
|
|
});
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
main() {
|
|
testController();
|
|
testSingleController();
|
|
testExtraMethods();
|
|
testPause();
|
|
testRethrow();
|
|
testBroadcastController();
|
|
testAsBroadcast();
|
|
testSink(sync: true, broadcast: false, asBroadcast: false);
|
|
testSink(sync: true, broadcast: false, asBroadcast: true);
|
|
testSink(sync: true, broadcast: true, asBroadcast: false);
|
|
testSink(sync: false, broadcast: false, asBroadcast: false);
|
|
testSink(sync: false, broadcast: false, asBroadcast: true);
|
|
testSink(sync: false, broadcast: true, asBroadcast: false);
|
|
}
|