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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';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
void main() {
testWidgetsWithLeakTracking('Widgets in view update as expected', (WidgetTester tester) async {
final Widget widget = View(
view: tester.view,
child: const TestWidget(),
);
await pumpWidgetWithoutViewWrapper(
tester: tester,
widget: widget,
);
expect(find.text('Hello'), findsOneWidget);
expect(tester.renderObject<RenderParagraph>(find.byType(Text)).text.toPlainText(), 'Hello');
tester.state<TestWidgetState>(find.byType(TestWidget)).text = 'World';
await tester.pump();
expect(find.text('Hello'), findsNothing);
expect(find.text('World'), findsOneWidget);
expect(tester.renderObject<RenderParagraph>(find.byType(Text)).text.toPlainText(), 'World');
await pumpWidgetWithoutViewWrapper(
tester: tester,
widget: ViewCollection(
views: <Widget>[widget],
),
);
expect(find.text('Hello'), findsNothing);
expect(find.text('World'), findsOneWidget);
expect(tester.renderObject<RenderParagraph>(find.byType(Text)).text.toPlainText(), 'World');
tester.state<TestWidgetState>(find.byType(TestWidget)).text = 'FooBar';
await pumpWidgetWithoutViewWrapper(
tester: tester,
widget: widget,
);
expect(find.text('World'), findsNothing);
expect(find.text('FooBar'), findsOneWidget);
expect(tester.renderObject<RenderParagraph>(find.byType(Text)).text.toPlainText(), 'FooBar');
});
testWidgetsWithLeakTracking('Views in ViewCollection update as expected', (WidgetTester tester) async {
Iterable<String> renderParagraphTexts() {
return tester.renderObjectList<RenderParagraph>(find.byType(Text)).map((RenderParagraph r) => r.text.toPlainText());
}
final Key key1 = UniqueKey();
final Key key2 = UniqueKey();
final Widget view1 = View(
view: tester.view,
child: TestWidget(key: key1),
);
final Widget view2 = View(
view: FakeView(tester.view),
child: TestWidget(key: key2),
);
await pumpWidgetWithoutViewWrapper(
tester: tester,
widget: ViewCollection(
views: <Widget>[view1, view2],
),
);
expect(find.text('Hello'), findsNWidgets(2));
expect(renderParagraphTexts(), <String>['Hello', 'Hello']);
tester.state<TestWidgetState>(find.byKey(key1)).text = 'Guten';
tester.state<TestWidgetState>(find.byKey(key2)).text = 'Tag';
await tester.pump();
expect(find.text('Hello'), findsNothing);
expect(find.text('Guten'), findsOneWidget);
expect(find.text('Tag'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Guten', 'Tag']);
tester.state<TestWidgetState>(find.byKey(key2)).text = 'Abend';
await tester.pump();
expect(find.text('Tag'), findsNothing);
expect(find.text('Guten'), findsOneWidget);
expect(find.text('Abend'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Guten', 'Abend']);
tester.state<TestWidgetState>(find.byKey(key2)).text = 'Morgen';
await pumpWidgetWithoutViewWrapper(
tester: tester,
widget: ViewCollection(
views: <Widget>[view1, ViewCollection(views: <Widget>[view2])],
),
);
expect(find.text('Abend'), findsNothing);
expect(find.text('Guten'), findsOneWidget);
expect(find.text('Morgen'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Guten', 'Morgen']);
});
testWidgetsWithLeakTracking('Views in ViewAnchor update as expected', (WidgetTester tester) async {
Iterable<String> renderParagraphTexts() {
return tester.renderObjectList<RenderParagraph>(find.byType(Text)).map((RenderParagraph r) => r.text.toPlainText());
}
final Key insideAnchoredViewKey = UniqueKey();
final Key outsideAnchoredViewKey = UniqueKey();
final Widget view = View(
view: FakeView(tester.view),
child: TestWidget(key: insideAnchoredViewKey),
);
await tester.pumpWidget(
ViewAnchor(
view: view,
child: TestWidget(key: outsideAnchoredViewKey),
),
);
expect(find.text('Hello'), findsNWidgets(2));
expect(renderParagraphTexts(), <String>['Hello', 'Hello']);
tester.state<TestWidgetState>(find.byKey(outsideAnchoredViewKey)).text = 'Guten';
tester.state<TestWidgetState>(find.byKey(insideAnchoredViewKey)).text = 'Tag';
await tester.pump();
expect(find.text('Hello'), findsNothing);
expect(find.text('Guten'), findsOneWidget);
expect(find.text('Tag'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Guten', 'Tag']);
tester.state<TestWidgetState>(find.byKey(insideAnchoredViewKey)).text = 'Abend';
await tester.pump();
expect(find.text('Tag'), findsNothing);
expect(find.text('Guten'), findsOneWidget);
expect(find.text('Abend'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Guten', 'Abend']);
tester.state<TestWidgetState>(find.byKey(outsideAnchoredViewKey)).text = 'Schönen';
await tester.pump();
expect(find.text('Guten'), findsNothing);
expect(find.text('Schönen'), findsOneWidget);
expect(find.text('Abend'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Schönen', 'Abend']);
tester.state<TestWidgetState>(find.byKey(insideAnchoredViewKey)).text = 'Tag';
await tester.pumpWidget(
ViewAnchor(
view: ViewCollection(views: <Widget>[view]),
child: TestWidget(key: outsideAnchoredViewKey),
),
);
await tester.pump();
expect(find.text('Abend'), findsNothing);
expect(find.text('Schönen'), findsOneWidget);
expect(find.text('Tag'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Schönen', 'Tag']);
tester.state<TestWidgetState>(find.byKey(insideAnchoredViewKey)).text = 'Morgen';
await tester.pumpWidget(
SizedBox(
child: ViewAnchor(
view: ViewCollection(views: <Widget>[view]),
child: TestWidget(key: outsideAnchoredViewKey),
),
),
);
await tester.pump();
expect(find.text('Schönen'), findsNothing); // The `outsideAnchoredViewKey` is not a global key, its state is lost in the move above.
expect(find.text('Tag'), findsNothing);
expect(find.text('Hello'), findsOneWidget);
expect(find.text('Morgen'), findsOneWidget);
expect(renderParagraphTexts(), <String>['Hello', 'Morgen']);
});
}
class TestWidget extends StatefulWidget {
const TestWidget({super.key});
@override
State<TestWidget> createState() => TestWidgetState();
}
class TestWidgetState extends State<TestWidget> {
String get text => _text;
String _text = 'Hello';
set text(String value) {
if (_text == value) {
return;
}
setState(() {
_text = value;
});
}
@override
Widget build(BuildContext context) {
return Text(text, textDirection: TextDirection.ltr);
}
}
Future<void> pumpWidgetWithoutViewWrapper({required WidgetTester tester, required Widget widget}) {
tester.binding.attachRootWidget(widget);
tester.binding.scheduleFrame();
return tester.binding.pump();
}
class FakeView extends TestFlutterView{
FakeView(FlutterView view, { this.viewId = 100 }) : super(
view: view,
platformDispatcher: view.platformDispatcher as TestPlatformDispatcher,
display: view.display as TestDisplay,
);
@override
final int viewId;
}