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a2b556b937
Change-Id: Ia5c41dda6503e1fbb8cc6099835d07588425e2ba Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/128310 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
80 lines
2.1 KiB
Dart
80 lines
2.1 KiB
Dart
// Copyright (c) 2013, 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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import 'package:async_helper/async_helper.dart';
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import "package:expect/expect.dart";
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import 'dart:async';
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import 'catch_errors.dart';
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main() {
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asyncStart();
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Completer done = new Completer();
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var events = [];
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late StreamController controller;
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late Stream stream;
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// Test that the first listen on a `asBroadcastStream` determines the
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// zone the subscription lives in. In this case the outer listen happens first
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// and the error reaches `handleError`.
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catchErrors(() {
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catchErrors(() {
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controller = new StreamController();
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// Assign to the "global" `stream`.
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stream = controller.stream.map((x) {
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events.add("map $x");
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return x + 100;
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}).transform(
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new StreamTransformer.fromHandlers(handleError: (e, st, sink) {
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sink.add("error $e");
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})).asBroadcastStream();
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// Listen to the `stream` in the inner zone (but wait in a microtask).
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scheduleMicrotask(() {
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stream.listen((x) {
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events.add("stream $x");
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if (x == "error 2") done.complete(true);
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});
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});
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})
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.listen((x) {
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events.add(x);
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})
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.asFuture()
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.then((_) {
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Expect.fail("Unexpected callback");
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});
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// Listen to `stream` from the outer zone.
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stream.listen((x) {
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events.add("stream2 $x");
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});
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// Feed the controller, but wait in a microtask.
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scheduleMicrotask(() {
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controller.add(1);
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controller.addError(2);
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controller.close();
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});
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}).listen((x) {
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events.add("outer: $x");
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}, onDone: () {
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Expect.fail("Unexpected callback");
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});
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done.future.whenComplete(() {
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// Give handlers time to complete.
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Timer.run(() {
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Expect.listEquals([
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"map 1",
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"stream2 101",
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"stream 101",
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"stream2 error 2",
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"stream error 2",
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], events);
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asyncEnd();
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});
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});
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}
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