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// 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:ui' as ui show window;
import 'dart:ui' show Size, Locale, WindowPadding, AccessibilityFeatures, Brightness;
import 'package:flutter/widgets.dart' show WidgetsBinding, WidgetsBindingObserver;
import 'package:flutter_test/flutter_test.dart';
void main() {
test('TestWindow can handle new methods without breaking', () {
final dynamic testWindow = TestWindow(window: ui.window);
// ignore: avoid_dynamic_calls
expect(testWindow.someNewProperty, null);
});
testWidgets('TestWindow can fake device pixel ratio', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<double>(
tester: tester,
realValue: ui.window.devicePixelRatio,
fakeValue: 2.5,
propertyRetriever: () {
return WidgetsBinding.instance!.window.devicePixelRatio;
},
propertyFaker: (TestWidgetsFlutterBinding binding, double fakeValue) {
binding.window.devicePixelRatioTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake physical size', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<Size>(
tester: tester,
realValue: ui.window.physicalSize,
fakeValue: const Size(50, 50),
propertyRetriever: () {
return WidgetsBinding.instance!.window.physicalSize;
},
propertyFaker: (TestWidgetsFlutterBinding binding, Size fakeValue) {
binding.window.physicalSizeTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake view insets', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<WindowPadding>(
tester: tester,
realValue: ui.window.viewInsets,
fakeValue: const FakeWindowPadding(),
propertyRetriever: () {
return WidgetsBinding.instance!.window.viewInsets;
},
propertyFaker: (TestWidgetsFlutterBinding binding, WindowPadding fakeValue) {
binding.window.viewInsetsTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake padding', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<WindowPadding>(
tester: tester,
realValue: ui.window.padding,
fakeValue: const FakeWindowPadding(),
propertyRetriever: () {
return WidgetsBinding.instance!.window.padding;
},
propertyFaker: (TestWidgetsFlutterBinding binding, WindowPadding fakeValue) {
binding.window.paddingTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake locale', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<Locale>(
tester: tester,
realValue: ui.window.locale,
fakeValue: const Locale('fake_language_code'),
propertyRetriever: () {
return WidgetsBinding.instance!.window.locale;
},
propertyFaker: (TestWidgetsFlutterBinding binding, Locale fakeValue) {
binding.window.localeTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake locales', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<List<Locale>>(
tester: tester,
realValue: ui.window.locales,
fakeValue: <Locale>[const Locale('fake_language_code')],
propertyRetriever: () {
return WidgetsBinding.instance!.window.locales;
},
propertyFaker: (TestWidgetsFlutterBinding binding, List<Locale> fakeValue) {
binding.window.localesTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake text scale factor', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<double>(
tester: tester,
realValue: ui.window.textScaleFactor,
fakeValue: 2.5,
propertyRetriever: () {
return WidgetsBinding.instance!.window.textScaleFactor;
},
propertyFaker: (TestWidgetsFlutterBinding binding, double fakeValue) {
binding.window.textScaleFactorTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake clock format', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<bool>(
tester: tester,
realValue: ui.window.alwaysUse24HourFormat,
fakeValue: !ui.window.alwaysUse24HourFormat,
propertyRetriever: () {
return WidgetsBinding.instance!.window.alwaysUse24HourFormat;
},
propertyFaker: (TestWidgetsFlutterBinding binding, bool fakeValue) {
binding.window.alwaysUse24HourFormatTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake default route name', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<String>(
tester: tester,
realValue: ui.window.defaultRouteName,
fakeValue: 'fake_route',
propertyRetriever: () {
return WidgetsBinding.instance!.window.defaultRouteName;
},
propertyFaker: (TestWidgetsFlutterBinding binding, String fakeValue) {
binding.window.defaultRouteNameTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake accessibility features', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<AccessibilityFeatures>(
tester: tester,
realValue: ui.window.accessibilityFeatures,
fakeValue: const FakeAccessibilityFeatures(),
propertyRetriever: () {
return WidgetsBinding.instance!.window.accessibilityFeatures;
},
propertyFaker: (TestWidgetsFlutterBinding binding, AccessibilityFeatures fakeValue) {
binding.window.accessibilityFeaturesTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can fake platform brightness', (WidgetTester tester) async {
verifyThatTestWindowCanFakeProperty<Brightness>(
tester: tester,
realValue: Brightness.light,
fakeValue: Brightness.dark,
propertyRetriever: () {
return WidgetsBinding.instance!.window.platformBrightness;
},
propertyFaker: (TestWidgetsFlutterBinding binding, Brightness fakeValue) {
binding.window.platformBrightnessTestValue = fakeValue;
},
);
});
testWidgets('TestWindow can clear out fake properties all at once', (WidgetTester tester) async {
final double originalDevicePixelRatio = ui.window.devicePixelRatio;
final double originalTextScaleFactor = ui.window.textScaleFactor;
final TestWindow testWindow = retrieveTestBinding(tester).window;
// Set fake values for window properties.
testWindow.devicePixelRatioTestValue = 2.5;
testWindow.textScaleFactorTestValue = 3.0;
// Erase fake window property values.
testWindow.clearAllTestValues();
// Verify that the window once again reports real property values.
expect(WidgetsBinding.instance!.window.devicePixelRatio, originalDevicePixelRatio);
expect(WidgetsBinding.instance!.window.textScaleFactor, originalTextScaleFactor);
});
testWidgets('TestWindow sends fake locales when WidgetsBindingObserver notifiers are called', (WidgetTester tester) async {
final List<Locale> defaultLocales = WidgetsBinding.instance!.window.locales;
final TestObserver observer = TestObserver();
retrieveTestBinding(tester).addObserver(observer);
final List<Locale> expectedValue = <Locale>[const Locale('fake_language_code')];
retrieveTestBinding(tester).window.localesTestValue = expectedValue;
expect(observer.locales, equals(expectedValue));
retrieveTestBinding(tester).window.localesTestValue = defaultLocales;
});
}
void verifyThatTestWindowCanFakeProperty<WindowPropertyType>({
required WidgetTester tester,
required WindowPropertyType? realValue,
required WindowPropertyType fakeValue,
required WindowPropertyType? Function() propertyRetriever,
required Function(TestWidgetsFlutterBinding, WindowPropertyType fakeValue) propertyFaker,
}) {
WindowPropertyType? propertyBeforeFaking;
WindowPropertyType? propertyAfterFaking;
propertyBeforeFaking = propertyRetriever();
propertyFaker(retrieveTestBinding(tester), fakeValue);
propertyAfterFaking = propertyRetriever();
expect(propertyBeforeFaking, realValue);
expect(propertyAfterFaking, fakeValue);
}
TestWidgetsFlutterBinding retrieveTestBinding(WidgetTester tester) {
final WidgetsBinding binding = tester.binding;
assert(binding is TestWidgetsFlutterBinding);
final TestWidgetsFlutterBinding testBinding = binding as TestWidgetsFlutterBinding;
return testBinding;
}
class FakeWindowPadding implements WindowPadding {
const FakeWindowPadding({
this.left = 0.0,
this.top = 0.0,
this.right = 0.0,
this.bottom = 0.0,
});
@override
final double left;
@override
final double top;
@override
final double right;
@override
final double bottom;
}
class TestObserver with WidgetsBindingObserver {
List<Locale>? locales;
Locale? locale;
@override
void didChangeLocales(List<Locale>? locales) {
this.locales = locales;
}
}