blob: b2ea885adcf34f30f1a422145069d85feafd3578 [file] [log] [blame]
// Copyright (c) 2015, 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.
/// Helper utilities for testing.
library async.test.util;
import "dart:async";
import "package:test/test.dart";
/// A zero-millisecond timer should wait until after all microtasks.
Future flushMicrotasks() => new Future.delayed(Duration.ZERO);
/// A generic unreachable callback function.
/// Returns a function that fails the test if it is ever called.
unreachable(String name) => ([a, b]) => fail("Unreachable: $name");
/// A badly behaved stream which throws if it's ever listened to.
/// Can be used to test cases where a stream should not be used.
class UnusableStream extends Stream {
listen(onData, {onError, onDone, cancelOnError}) {
throw new UnimplementedError("Gotcha!");