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Contributes to https://github.com/flutter/flutter/issues/130459 It adds a test for - `examples/api/lib/material/dropdown_menu/dropdown_menu.1.dart`
57 lines
1.9 KiB
Dart
57 lines
1.9 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/dropdown_menu/dropdown_menu.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('The DropdownMenu should display a menu with the list of entries the user can select', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.DropdownMenuApp(),
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);
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expect(find.widgetWithText(TextField, 'One'), findsOne);
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final Finder menu = find.byType(DropdownMenu<String>);
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expect(menu, findsOne);
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Finder findMenuItem(String label) {
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return find.widgetWithText(MenuItemButton, label).last;
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}
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await tester.tap(menu);
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await tester.pumpAndSettle();
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expect(findMenuItem('One'), findsOne);
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expect(findMenuItem('Two'), findsOne);
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expect(findMenuItem('Three'), findsOne);
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expect(findMenuItem('Four'), findsOne);
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await tester.tap(findMenuItem('Two'));
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// The DropdownMenu's onSelected callback is delayed
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// with SchedulerBinding.instance.addPostFrameCallback
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// to give the focus a chance to return to where it was
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// before the menu appeared. The pumpAndSettle()
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// give the callback a chance to run.
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await tester.pumpAndSettle();
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expect(find.widgetWithText(TextField, 'Two'), findsOne);
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});
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testWidgets('DropdownMenu has focus when tapping on the text field', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.DropdownMenuApp(),
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);
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// Make sure the dropdown menus are there.
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final Finder menu = find.byType(DropdownMenu<String>);
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expect(menu, findsOne);
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// Tap on the menu and make sure it is focused.
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await tester.tap(menu);
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await tester.pumpAndSettle();
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expect(FocusScope.of(tester.element(menu)).hasFocus, isTrue);
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});
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}
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