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// Copyright 2015 The Chromium 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 'package:flutter/foundation.dart';
import 'package:flutter/scheduler.dart';
import 'package:test/test.dart';
import 'scheduler_tester.dart';
class TestSchedulerBinding extends BindingBase with SchedulerBinding { }
void main() {
final SchedulerBinding scheduler = new TestSchedulerBinding();
test("Check for a time dilation being in effect", () {
expect(timeDilation, equals(1.0));
});
test("Can cancel queued callback", () {
int secondId;
bool firstCallbackRan = false;
bool secondCallbackRan = false;
void firstCallback(Duration timeStamp) {
expect(firstCallbackRan, isFalse);
expect(secondCallbackRan, isFalse);
expect(timeStamp.inMilliseconds, equals(0));
firstCallbackRan = true;
scheduler.cancelFrameCallbackWithId(secondId);
}
void secondCallback(Duration timeStamp) {
expect(firstCallbackRan, isTrue);
expect(secondCallbackRan, isFalse);
expect(timeStamp.inMilliseconds, equals(0));
secondCallbackRan = true;
}
scheduler.scheduleFrameCallback(firstCallback);
secondId = scheduler.scheduleFrameCallback(secondCallback);
tick(const Duration(milliseconds: 16));
expect(firstCallbackRan, isTrue);
expect(secondCallbackRan, isFalse);
firstCallbackRan = false;
secondCallbackRan = false;
tick(const Duration(milliseconds: 32));
expect(firstCallbackRan, isFalse);
expect(secondCallbackRan, isFalse);
});
}