59 lines
1.5 KiB
Dart
59 lines
1.5 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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// @dart = 2.8
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import 'package:flutter_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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void main() {
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testWidgets('setState() overbuild test', (WidgetTester tester) async {
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final List<String> log = <String>[];
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final Builder inner = Builder(
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builder: (BuildContext context) {
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log.add('inner');
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return const Text('inner', textDirection: TextDirection.ltr);
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}
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);
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int value = 0;
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await tester.pumpWidget(Builder(
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builder: (BuildContext context) {
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log.add('outer');
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return StatefulBuilder(
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builder: (BuildContext context, StateSetter setState) {
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log.add('stateful');
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return GestureDetector(
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onTap: () {
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setState(() {
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value += 1;
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});
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},
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child: Builder(
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builder: (BuildContext context) {
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log.add('middle $value');
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return inner;
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}
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),
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);
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}
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);
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}
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));
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log.add('---');
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await tester.tap(find.text('inner'));
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await tester.pump();
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log.add('---');
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expect(log, equals(<String>[
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'outer',
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'stateful',
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'middle 0',
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'inner',
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'---',
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'stateful',
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'middle 1',
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'---',
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]));
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});
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}
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