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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 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
class TestRoute extends PageRouteBuilder<void> {
TestRoute(Widget child) : super(
pageBuilder: (BuildContext _, Animation<double> __, Animation<double> ___) => child,
);
}
class IconTextBox extends StatelessWidget {
const IconTextBox(this.text, { super.key });
final String text;
@override
Widget build(BuildContext context) {
return Container(
alignment: Alignment.center,
child: Row(
children: <Widget>[const Icon(IconData(0x41, fontFamily: 'Roboto')), Text(text)],
),
);
}
}
void main() {
testWidgets('InheritedTheme.captureAll()', (WidgetTester tester) async {
const double fontSize = 32;
const double iconSize = 48;
const Color textColor = Color(0xFF00FF00);
const Color iconColor = Color(0xFF0000FF);
bool useCaptureAll = false;
late BuildContext navigatorContext;
Widget buildFrame() {
return WidgetsApp(
color: const Color(0xFFFFFFFF),
onGenerateRoute: (RouteSettings settings) {
return TestRoute(
// The outer DefaultTextStyle and IconTheme widgets must have
// no effect on the test because InheritedTheme.captureAll()
// is required to only save the closest InheritedTheme ancestors.
DefaultTextStyle(
style: const TextStyle(fontSize: iconSize, color: iconColor),
child: IconTheme(
data: const IconThemeData(size: fontSize, color: textColor),
// The inner DefaultTextStyle and IconTheme widgets define
// InheritedThemes that captureAll() will wrap() around
// TestRoute's IconTextBox child.
child: DefaultTextStyle(
style: const TextStyle(fontSize: fontSize, color: textColor),
child: IconTheme(
data: const IconThemeData(size: iconSize, color: iconColor),
child: Builder(
builder: (BuildContext context) {
return GestureDetector(
behavior: HitTestBehavior.opaque,
onTap: () {
navigatorContext = context;
Navigator.of(context).push(
TestRoute(
useCaptureAll
? InheritedTheme.captureAll(context, const IconTextBox('Hello'))
: const IconTextBox('Hello'),
),
);
},
child: const IconTextBox('Tap'),
);
},
),
),
),
),
),
);
},
);
}
TextStyle getIconStyle() {
return tester.widget<RichText>(
find.descendant(
of: find.byType(Icon),
matching: find.byType(RichText),
),
).text.style!;
}
TextStyle getTextStyle(String text) {
return tester.widget<RichText>(
find.descendant(
of: find.text(text),
matching: find.byType(RichText),
),
).text.style!;
}
useCaptureAll = false;
await tester.pumpWidget(buildFrame());
expect(find.text('Tap'), findsOneWidget);
expect(find.text('Hello'), findsNothing);
expect(getTextStyle('Tap').color, textColor);
expect(getTextStyle('Tap').fontSize, fontSize);
expect(getIconStyle().color, iconColor);
expect(getIconStyle().fontSize, iconSize);
// Tap to show the TestRoute
await tester.tap(find.text('Tap'));
await tester.pumpAndSettle(); // route transition
expect(find.text('Tap'), findsNothing);
expect(find.text('Hello'), findsOneWidget);
// The new route's text and icons will NOT inherit the DefaultTextStyle or
// IconTheme values.
expect(getTextStyle('Hello').color, isNot(textColor));
expect(getTextStyle('Hello').fontSize, isNot(fontSize));
expect(getIconStyle().color, isNot(iconColor));
expect(getIconStyle().fontSize, isNot(iconSize));
// Return to the home route
useCaptureAll = true;
Navigator.of(navigatorContext).pop();
await tester.pumpAndSettle(); // route transition
// Verify that all is the same as it was when the test started
expect(find.text('Tap'), findsOneWidget);
expect(find.text('Hello'), findsNothing);
expect(getTextStyle('Tap').color, textColor);
expect(getTextStyle('Tap').fontSize, fontSize);
expect(getIconStyle().color, iconColor);
expect(getIconStyle().fontSize, iconSize);
// Tap to show the TestRoute. The test route's IconTextBox will have been
// wrapped with InheritedTheme.captureAll().
await tester.tap(find.text('Tap'));
await tester.pumpAndSettle(); // route transition
expect(find.text('Tap'), findsNothing);
expect(find.text('Hello'), findsOneWidget);
// The new route's text and icons will inherit the DefaultTextStyle or
// IconTheme values because captureAll.
expect(getTextStyle('Hello').color, textColor);
expect(getTextStyle('Hello').fontSize, fontSize);
expect(getIconStyle().color, iconColor);
expect(getIconStyle().fontSize, iconSize);
});
testWidgets('InheritedTheme.captureAll() multiple IconTheme ancestors', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/39087
const Color outerColor = Color(0xFF0000FF);
const Color innerColor = Color(0xFF00FF00);
const double iconSize = 48;
final Key icon1 = UniqueKey();
final Key icon2 = UniqueKey();
await tester.pumpWidget(
WidgetsApp(
color: const Color(0xFFFFFFFF),
onGenerateRoute: (RouteSettings settings) {
return TestRoute(
IconTheme(
data: const IconThemeData(color: outerColor),
child: IconTheme(
data: const IconThemeData(size: iconSize, color: innerColor),
child: Center(
child: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Icon(const IconData(0x41, fontFamily: 'Roboto'), key: icon1),
Builder(
builder: (BuildContext context) {
// The same IconThemes are visible from this context
// and the context that the widget returned by captureAll()
// is built in. So only the inner green IconTheme should
// apply to the icon, i.e. both icons will be big and green.
return InheritedTheme.captureAll(
context,
Icon(const IconData(0x41, fontFamily: 'Roboto'), key: icon2),
);
},
),
],
),
),
),
),
);
},
),
);
TextStyle getIconStyle(Key key) {
return tester.widget<RichText>(
find.descendant(
of: find.byKey(key),
matching: find.byType(RichText),
),
).text.style!;
}
expect(getIconStyle(icon1).color, innerColor);
expect(getIconStyle(icon1).fontSize, iconSize);
expect(getIconStyle(icon2).color, innerColor);
expect(getIconStyle(icon2).fontSize, iconSize);
});
testWidgets('InheritedTheme.captureAll() multiple DefaultTextStyle ancestors', (WidgetTester tester) async {
// This is a regression test for https://github.com/flutter/flutter/issues/39087
const Color textColor = Color(0xFF00FF00);
await tester.pumpWidget(
WidgetsApp(
color: const Color(0xFFFFFFFF),
onGenerateRoute: (RouteSettings settings) {
return TestRoute(
DefaultTextStyle(
style: const TextStyle(fontSize: 48),
child: DefaultTextStyle(
style: const TextStyle(color: textColor),
child: Row(
children: <Widget>[
const Text('Hello'),
Builder(
builder: (BuildContext context) {
return InheritedTheme.captureAll(context, const Text('World'));
},
),
],
),
),
),
);
},
),
);
TextStyle getTextStyle(String text) {
return tester.widget<RichText>(
find.descendant(
of: find.text(text),
matching: find.byType(RichText),
),
).text.style!;
}
expect(getTextStyle('Hello').fontSize, null);
expect(getTextStyle('Hello').color, textColor);
expect(getTextStyle('World').fontSize, null);
expect(getTextStyle('World').color, textColor);
});
}