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aaa4d336f6
Adds tests to the last two Snack Bar examples as part of #130459. Makes the [last example](https://api.flutter.dev/flutter/material/SnackBar-class.html#material.SnackBar.3) more usable through the use of standard widgets and visual hierarchy. Constraints on options that are not required by the SnackBar contract have been removed (Overflow threshold works on fixed SnackBars).
61 lines
2.1 KiB
Dart
61 lines
2.1 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/material.dart';
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import 'package:flutter_api_samples/material/snack_bar/snack_bar.1.dart' as example;
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('Tapping on button shows snackbar', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.SnackBarExampleApp(),
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);
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expect(find.byType(SnackBar), findsNothing);
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expect(find.widgetWithText(AppBar, 'SnackBar Sample'), findsOneWidget);
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await tester.tap(find.widgetWithText(ElevatedButton, 'Show Snackbar'));
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await tester.pump();
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expect(find.text('Awesome SnackBar!'), findsOneWidget);
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expect(find.widgetWithText(SnackBarAction, 'Action'), findsOneWidget);
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final SnackBar bar = tester.widget<SnackBar>(find.ancestor(
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of: find.text('Awesome SnackBar!'),
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matching: find.byType(SnackBar)));
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expect(bar.behavior, SnackBarBehavior.floating);
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});
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testWidgets('Snackbar is styled correctly', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.SnackBarExampleApp(),
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);
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await tester.tap(find.byType(ElevatedButton));
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await tester.pump();
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expect(find.byType(SnackBar), findsOneWidget);
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final SnackBar bar = tester.widget<SnackBar>(find.byType(SnackBar));
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expect(bar.behavior, SnackBarBehavior.floating);
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expect(bar.width, 280.0);
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expect(bar.shape, isA<RoundedRectangleBorder>()
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.having((RoundedRectangleBorder b) => b.borderRadius, 'radius', BorderRadius.circular(10.0)));
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});
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testWidgets('Snackbar should disappear after timeout', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.SnackBarExampleApp(),
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);
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expect(find.byType(SnackBar), findsNothing);
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await tester.tap(find.byType(ElevatedButton));
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await tester.pumpAndSettle();
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expect(find.byType(SnackBar), findsOneWidget);
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await tester.pump(const Duration(milliseconds: 1500));
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await tester.pumpAndSettle();
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expect(find.byType(SnackBar), findsNothing);
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});
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}
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