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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';
void main() {
testWidgets('Directionality', (WidgetTester tester) async {
final List<TextDirection> log = <TextDirection>[];
final Widget inner = Builder(
builder: (BuildContext context) {
log.add(Directionality.of(context));
return const Placeholder();
},
);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: inner,
),
);
expect(log, <TextDirection>[TextDirection.ltr]);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: inner,
),
);
expect(log, <TextDirection>[TextDirection.ltr]);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.rtl,
child: inner,
),
);
expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl]);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.rtl,
child: inner,
),
);
expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl]);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: inner,
),
);
expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl, TextDirection.ltr]);
});
testWidgets('Directionality default', (WidgetTester tester) async {
bool good = false;
await tester.pumpWidget(Builder(
builder: (BuildContext context) {
expect(Directionality.maybeOf(context), isNull);
good = true;
return const Placeholder();
},
));
expect(good, isTrue);
});
testWidgets('Directionality.maybeOf', (WidgetTester tester) async {
final GlobalKey hasDirectionality = GlobalKey();
final GlobalKey noDirectionality = GlobalKey();
await tester.pumpWidget(
Container(
key: noDirectionality,
child: Directionality(
textDirection: TextDirection.rtl,
child: Container(
key: hasDirectionality,
),
),
),
);
expect(Directionality.maybeOf(noDirectionality.currentContext!), isNull);
expect(Directionality.maybeOf(hasDirectionality.currentContext!), TextDirection.rtl);
});
testWidgets('Directionality.of', (WidgetTester tester) async {
final GlobalKey hasDirectionality = GlobalKey();
final GlobalKey noDirectionality = GlobalKey();
await tester.pumpWidget(
Container(
key: noDirectionality,
child: Directionality(
textDirection: TextDirection.rtl,
child: Container(
key: hasDirectionality,
),
),
),
);
expect(() => Directionality.of(noDirectionality.currentContext!), throwsA(isAssertionError.having(
(AssertionError e) => e.message,
'message',
contains('No Directionality widget found.'),
)));
expect(Directionality.of(hasDirectionality.currentContext!), TextDirection.rtl);
});
}