83 lines
3 KiB
Dart
83 lines
3 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('Directionality', (WidgetTester tester) async {
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final log = <TextDirection>[];
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final Widget inner = Builder(
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builder: (BuildContext context) {
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log.add(Directionality.of(context));
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return const Placeholder();
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},
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);
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await tester.pumpWidget(Directionality(textDirection: TextDirection.ltr, child: inner));
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expect(log, <TextDirection>[TextDirection.ltr]);
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await tester.pumpWidget(Directionality(textDirection: TextDirection.ltr, child: inner));
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expect(log, <TextDirection>[TextDirection.ltr]);
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await tester.pumpWidget(Directionality(textDirection: TextDirection.rtl, child: inner));
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expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl]);
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await tester.pumpWidget(Directionality(textDirection: TextDirection.rtl, child: inner));
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expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl]);
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await tester.pumpWidget(Directionality(textDirection: TextDirection.ltr, child: inner));
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expect(log, <TextDirection>[TextDirection.ltr, TextDirection.rtl, TextDirection.ltr]);
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});
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testWidgets('Directionality default', (WidgetTester tester) async {
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var good = false;
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await tester.pumpWidget(
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Builder(
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builder: (BuildContext context) {
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expect(Directionality.maybeOf(context), isNull);
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good = true;
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return const Placeholder();
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},
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),
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);
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expect(good, isTrue);
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});
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testWidgets('Directionality.maybeOf', (WidgetTester tester) async {
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final GlobalKey hasDirectionality = GlobalKey();
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final GlobalKey noDirectionality = GlobalKey();
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await tester.pumpWidget(
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Container(
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key: noDirectionality,
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child: Directionality(
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textDirection: TextDirection.rtl,
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child: Container(key: hasDirectionality),
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),
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),
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);
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expect(Directionality.maybeOf(noDirectionality.currentContext!), isNull);
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expect(Directionality.maybeOf(hasDirectionality.currentContext!), TextDirection.rtl);
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});
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testWidgets('Directionality.of', (WidgetTester tester) async {
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final GlobalKey hasDirectionality = GlobalKey();
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final GlobalKey noDirectionality = GlobalKey();
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await tester.pumpWidget(
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Container(
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key: noDirectionality,
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child: Directionality(
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textDirection: TextDirection.rtl,
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child: Container(key: hasDirectionality),
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),
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),
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);
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expect(
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() => Directionality.of(noDirectionality.currentContext!),
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throwsA(
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isAssertionError.having(
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(AssertionError e) => e.message,
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'message',
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contains('No Directionality widget found.'),
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),
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),
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);
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expect(Directionality.of(hasDirectionality.currentContext!), TextDirection.rtl);
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});
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}
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