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47 lines
1.5 KiB
Dart
47 lines
1.5 KiB
Dart
// Copyright 2020 The Flutter team. 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/services.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:platform_channels/src/method_channel_demo.dart';
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void main() {
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group('MethodChannelDemo tests', () {
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testWidgets('MethodChannelDemo count test', (tester) async {
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tester.binding.defaultBinaryMessenger.setMockMethodCallHandler(
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const MethodChannel('methodChannelDemo'),
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(call) async {
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var count = call.arguments['count'] as int;
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if (call.method == 'increment') {
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return ++count;
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} else if (call.method == 'decrement') {
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return --count;
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}
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return MissingPluginException();
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},
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);
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await tester.pumpWidget(
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const MaterialApp(home: MethodChannelDemo()),
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);
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// Initially the value of count should be 0.
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expect(find.text('Value of count is 0'), findsOneWidget);
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// Tap the ElevatedButton with Icons.add to increment the value of count.
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await tester.tap(find.byIcon(Icons.add));
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await tester.pump();
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expect(find.text('Value of count is 1'), findsOneWidget);
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// Tap the ElevatedButton with Icons.remove to decrement the value of count.
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await tester.tap(find.byIcon(Icons.remove));
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await tester.pump();
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expect(find.text('Value of count is 0'), findsOneWidget);
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});
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});
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}
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