blob: 9d94d9373b4a494a450bcb43826f9459fa3916a0 [file] [log] [blame]
// 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/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_api_samples/widgets/text_magnifier/text_magnifier.0.dart'
as example;
import 'package:flutter_test/flutter_test.dart';
List<TextSelectionPoint> _globalize(
Iterable<TextSelectionPoint> points, RenderBox box) {
return points.map<TextSelectionPoint>((TextSelectionPoint point) {
return TextSelectionPoint(
box.localToGlobal(point.point),
point.direction,
);
}).toList();
}
RenderEditable _findRenderEditable<T extends State<StatefulWidget>>(WidgetTester tester) {
return (tester.state(find.byType(TextField))
as TextSelectionGestureDetectorBuilderDelegate)
.editableTextKey
.currentState!
.renderEditable;
}
Offset _textOffsetToPosition<T extends State<StatefulWidget>>(WidgetTester tester, int offset) {
final RenderEditable renderEditable = _findRenderEditable(tester);
final List<TextSelectionPoint> endpoints = renderEditable
.getEndpointsForSelection(
TextSelection.collapsed(offset: offset),
)
.map<TextSelectionPoint>((TextSelectionPoint point) => TextSelectionPoint(
renderEditable.localToGlobal(point.point),
point.direction,
))
.toList();
return endpoints[0].point + const Offset(0.0, -2.0);
}
void main() {
const Duration durationBetweenActions = Duration(milliseconds: 20);
const String defaultText = 'I am a magnifier, fear me!';
Future<void> showMagnifier(WidgetTester tester, String characterToTapOn) async {
final Offset tapOffset = _textOffsetToPosition(tester, defaultText.indexOf(characterToTapOn));
// Double tap 'Magnifier' word to show the selection handles.
final TestGesture testGesture = await tester.startGesture(tapOffset);
await tester.pump(durationBetweenActions);
await testGesture.up();
await tester.pump(durationBetweenActions);
await testGesture.down(tapOffset);
await tester.pump(durationBetweenActions);
await testGesture.up();
await tester.pumpAndSettle();
final TextSelection selection = tester
.firstWidget<TextField>(find.byType(TextField))
.controller!
.selection;
final RenderEditable renderEditable = _findRenderEditable(tester);
final List<TextSelectionPoint> endpoints = _globalize(
renderEditable.getEndpointsForSelection(selection),
renderEditable,
);
final Offset handlePos = endpoints.last.point + const Offset(10.0, 10.0);
final TestGesture gesture = await tester.startGesture(handlePos);
await gesture.moveTo(
_textOffsetToPosition(
tester,
defaultText.length - 2,
),
);
await tester.pump();
}
testWidgets('should show custom magnifier on drag', (WidgetTester tester) async {
await tester.pumpWidget(const example.TextMagnifierExampleApp(text: defaultText));
await showMagnifier(tester, 'e');
expect(find.byType(example.CustomMagnifier), findsOneWidget);
await expectLater(
find.byType(example.TextMagnifierExampleApp),
matchesGoldenFile('text_magnifier.0_test.png'),
);
}, variant: const TargetPlatformVariant(<TargetPlatform>{ TargetPlatform.iOS, TargetPlatform.android }));
for (final TextDirection textDirection in TextDirection.values) {
testWidgets('should show custom magnifier in $textDirection', (WidgetTester tester) async {
final String text = textDirection == TextDirection.rtl ? 'أثارت زر' : defaultText;
final String textToTapOn = textDirection == TextDirection.rtl ? 'ت' : 'e';
await tester.pumpWidget(example.TextMagnifierExampleApp(textDirection: textDirection, text: text));
await showMagnifier(tester, textToTapOn);
expect(find.byType(example.CustomMagnifier), findsOneWidget);
});
}
}