blob: e1ed3f647f59a101d0693a98fdf75307ee6ca165 [file] [log] [blame]
// Copyright 2017 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 'dart:typed_data';
import 'package:flutter_test/flutter_test.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
class MemoryPressureObserver with WidgetsBindingObserver {
bool sawMemoryPressure = false;
@override
void didHaveMemoryPressure() {
sawMemoryPressure = true;
}
}
class AppLifecycleStateObserver with WidgetsBindingObserver {
AppLifecycleState lifecycleState;
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
lifecycleState = state;
}
}
class PushRouteObserver with WidgetsBindingObserver {
String pushedRoute;
@override
Future<bool> didPushRoute(String route) async {
pushedRoute = route;
return true;
}
}
void main() {
setUp(() {
WidgetsFlutterBinding.ensureInitialized();
});
testWidgets('didHaveMemoryPressure callback', (WidgetTester tester) async {
final MemoryPressureObserver observer = MemoryPressureObserver();
WidgetsBinding.instance.addObserver(observer);
final ByteData message = const JSONMessageCodec().encodeMessage(
<String, dynamic>{'type': 'memoryPressure'});
await ServicesBinding.instance.defaultBinaryMessenger.handlePlatformMessage('flutter/system', message, (_) { });
expect(observer.sawMemoryPressure, true);
WidgetsBinding.instance.removeObserver(observer);
});
testWidgets('handleLifecycleStateChanged callback', (WidgetTester tester) async {
final BinaryMessenger defaultBinaryMessenger = ServicesBinding.instance.defaultBinaryMessenger;
final AppLifecycleStateObserver observer = AppLifecycleStateObserver();
WidgetsBinding.instance.addObserver(observer);
ByteData message = const StringCodec().encodeMessage('AppLifecycleState.paused');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(observer.lifecycleState, AppLifecycleState.paused);
message = const StringCodec().encodeMessage('AppLifecycleState.resumed');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(observer.lifecycleState, AppLifecycleState.resumed);
message = const StringCodec().encodeMessage('AppLifecycleState.inactive');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(observer.lifecycleState, AppLifecycleState.inactive);
message = const StringCodec().encodeMessage('AppLifecycleState.suspending');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(observer.lifecycleState, AppLifecycleState.suspending);
});
testWidgets('didPushRoute callback', (WidgetTester tester) async {
final PushRouteObserver observer = PushRouteObserver();
WidgetsBinding.instance.addObserver(observer);
const String testRouteName = 'testRouteName';
final ByteData message = const JSONMethodCodec().encodeMethodCall(
const MethodCall('pushRoute', testRouteName));
await ServicesBinding.instance.defaultBinaryMessenger.handlePlatformMessage('flutter/navigation', message, (_) { });
expect(observer.pushedRoute, testRouteName);
WidgetsBinding.instance.removeObserver(observer);
});
testWidgets('Application lifecycle affects frame scheduling', (WidgetTester tester) async {
final BinaryMessenger defaultBinaryMessenger = ServicesBinding.instance.defaultBinaryMessenger;
ByteData message;
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.paused');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.resumed');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isTrue);
await tester.pump();
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.inactive');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.suspending');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.inactive');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isTrue);
await tester.pump();
expect(tester.binding.hasScheduledFrame, isFalse);
message = const StringCodec().encodeMessage('AppLifecycleState.paused');
await defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
expect(tester.binding.hasScheduledFrame, isFalse);
tester.binding.scheduleFrame();
expect(tester.binding.hasScheduledFrame, isFalse);
tester.binding.scheduleForcedFrame();
expect(tester.binding.hasScheduledFrame, isTrue);
await tester.pump();
expect(tester.binding.hasScheduledFrame, isFalse);
int frameCount = 0;
tester.binding.addPostFrameCallback((Duration duration) { frameCount += 1; });
expect(tester.binding.hasScheduledFrame, isFalse);
await tester.pump(const Duration(milliseconds: 1));
expect(tester.binding.hasScheduledFrame, isFalse);
expect(frameCount, 0);
tester.binding.scheduleWarmUpFrame(); // this actually tests flutter_test's implementation
expect(tester.binding.hasScheduledFrame, isFalse);
expect(frameCount, 1);
});
}