blob: 5054bae635a9b474ae77757e2cb82a7823bb45e1 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. 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:flutter/foundation.dart';
import '../flutter_test_alternative.dart';
void main() {
test('SynchronousFuture control test', () async {
final Future<int> future = SynchronousFuture<int>(42);
int result;
future.then<void>((int value) { result = value; });
expect(result, equals(42));
result = null;
final Future<int> futureWithTimeout = future.timeout(const Duration(milliseconds: 1));
futureWithTimeout.then<void>((int value) { result = value; });
expect(result, isNull);
await futureWithTimeout;
expect(result, equals(42));
result = null;
final Stream<int> stream = future.asStream();
expect(await stream.single, equals(42));
bool ranAction = false;
final Future<int> completeResult = future.whenComplete(() {
ranAction = true;
return Future<int>.value(31);
});
expect(ranAction, isTrue);
ranAction = false;
expect(await completeResult, equals(42));
Object exception;
try {
await future.whenComplete(() {
throw null;
});
// Unreached.
expect(false, isTrue);
} catch (e) {
exception = e;
}
expect(exception, isNullThrownError);
});
}