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Add more tests to slider to avoid future breakages (#98772)

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Michael Goderbauer 2022-02-18 16:59:23 -08:00 committed by GitHub
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packages/flutter/test/material/value_indicating_slider_test.dart Normal file
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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.
// This file is run as part of a reduced test set in CI on Mac and Windows
// machines.
@Tags(<String>['reduced-test-set'])
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('Slider value indicator', (WidgetTester tester) async {
await _buildValueIndicatorStaticSlider(
tester,
value: 0,
);
await _pressStartThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_start_text_scale_1_width_0'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 0.5,
);
await _pressMiddleThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_middle_text_scale_1_width_0'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 1,
);
await _pressEndThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_end_text_scale_1_width_0'),
);
});
testWidgets('Slider value indicator wide text', (WidgetTester tester) async {
await _buildValueIndicatorStaticSlider(
tester,
value: 0,
decimalCount: 5,
);
await _pressStartThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_start_text_scale_1_width_5'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 0.5,
decimalCount: 5,
);
await _pressMiddleThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_middle_text_scale_1_width_5'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 1,
decimalCount: 5,
);
await _pressEndThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_end_text_scale_1_width_5'),
);
});
testWidgets('Slider value indicator large text scale', (WidgetTester tester) async {
await _buildValueIndicatorStaticSlider(
tester,
value: 0,
textScale: 3,
);
await _pressStartThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_start_text_scale_4_width_0'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 0.5,
textScale: 3,
);
await _pressMiddleThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_middle_text_scale_4_width_0'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 1,
textScale: 3,
);
await _pressEndThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_end_text_scale_4_width_0'),
);
});
testWidgets('Slider value indicator large text scale and wide text',
(WidgetTester tester) async {
await _buildValueIndicatorStaticSlider(
tester,
value: 0,
textScale: 3,
decimalCount: 5,
);
await _pressStartThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_start_text_scale_4_width_5'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 0.5,
textScale: 3,
decimalCount: 5,
);
await _pressMiddleThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_middle_text_scale_4_width_5'),
);
await _buildValueIndicatorStaticSlider(
tester,
value: 1,
textScale: 3,
decimalCount: 5,
);
await _pressEndThumb(tester);
await expectLater(
find.byType(MaterialApp),
matchesGoldenFile('slider_end_text_scale_4_width_5'),
);
});
}
Future<void> _pressStartThumb(WidgetTester tester) async {
final Offset bottomLeft = tester.getBottomLeft(find.byType(Slider));
final Offset topLeft = tester.getTopLeft(find.byType(Slider));
final Offset left = (bottomLeft + topLeft) / 2;
final Offset start = left + const Offset(24, 0);
await tester.startGesture(start);
await tester.pumpAndSettle();
}
Future<void> _pressMiddleThumb(WidgetTester tester) async {
await tester.press(find.byType(Slider));
await tester.pumpAndSettle();
}
Future<void> _pressEndThumb(WidgetTester tester) async {
final Offset bottomRight = tester.getBottomRight(find.byType(Slider));
final Offset topRight = tester.getTopRight(find.byType(Slider));
final Offset right = (bottomRight + topRight) / 2;
final Offset start = right - const Offset(24, 0);
await tester.startGesture(start);
await tester.pumpAndSettle();
}
Future<void> _buildValueIndicatorStaticSlider(
WidgetTester tester, {
required double value,
double textScale = 1.0,
int decimalCount = 0,
}) async {
await tester.pumpWidget(
MaterialApp(
home: Scaffold(
body: Builder(
builder: (BuildContext context) {
return Center(
child: MediaQuery(
data: MediaQueryData(textScaleFactor: textScale),
child: SliderTheme(
data: Theme.of(context).sliderTheme.copyWith(
showValueIndicator: ShowValueIndicator.always,
),
child: Slider(
value: value,
label: value.toStringAsFixed(decimalCount),
onChanged: (double newValue) {},
),
),
),
);
},
),
),
),
);
}