Flutter未知功能插件ngtest的使用(由于介绍为undefined,故以“未知功能”代替)
Flutter未知功能插件ngtest的使用(由于介绍为undefined,故以“未知功能”代替)
标题
Flutter未知功能插件ngtest的使用(由于介绍为undefined,故以“未知功能”代替
内容
<section class="tab-content detail-tab-readme-content -active markdown-body">
<p><a href="https://pub.dev/packages/ngtest"><img src="https://img.shields.io/pub/v/ngtest.svg" alt="Pub package"></a>
<a href="https://github.com/angulardart-community/angular/actions/workflows/dart.yml" rel="ugc"><img src="https://img.shields.io/github/workflow/status/angulardart-community/angular/Dart%20CI" alt="Build Status"></a>
<a href="https://gitter.im/angulardart/community" rel="ugc"><img src="https://img.shields.io/gitter/room/angulardart/community" alt="Gitter"></a></p>
<p>Testing infrastructure for <a href="https://pub.dev/packages/ngdart">AngularDart</a>, used with the
<a href="https://pub.dev/packages/build_runner"><code>build_runner</code> package</a>.</p>
<p>See <a href="https://github.com/angulardart-community" rel="ugg">https://github.com/angulardart-community</a> for current updates on this project.</p>
<p>Documentation and examples:</p>
<ul>
<li><a href="https://github.com/angulardart-community/angular/tree/master/_tests/test" rel="ugc"><code>_tests/test/</code></a> (tests for the main dart-lang/angular package)</li>
</ul>
<p>Additional resources:</p>
<ul>
<li>Community/support: <a href="https://gitter.im/angulardart/community" rel="ugc">Gitter chat room</a></li>
</ul>
<h2 class="hash-header" id="overview">Overview <a href="#overview" class="hash-link">#</a></h2>
<p><code>ngtest</code> is a library for writing tests for AngularDart components.</p>
<pre><code class="language-dart">// Assume this is 'my_test.dart'.
import 'my_test.template.dart' as ng;
void main() {
ng.initReflector();
tearDown(disposeAnyRunningTest);
test('should render "Hello World"', () async {
final testBed = new NgTestBed<HelloWorldComponent>();
final testFixture = await testBed.create();
expect(testFixture.text, 'Hello World');
await testFixture.update((c) => c.name = 'Universe');
expect(testFixture.text, 'Hello Universe');
});
}
@Component(selector: 'test', template: 'Hello {{name}}')
class HelloWorldComponent {
String name = 'World';
}
</code></pre>
<p>To use <code>ngtest</code>, configure your package's <code>pubspec.yaml</code> as follows:</p>
<pre><code class="language-yaml"># Use the latest versions if possible.
dev_dependencies:
build_runner: ^2.0.0
build_test: ^2.0.0
build_web_compilers: ^3.0.0
</code></pre>
<p><strong>IMPORTANT</strong>: <code>ngtest</code> will not run without these dependencies set.</p>
<p>To run tests, use <code>pub run build_runner test</code>. It automatically compiles your
templates and annotations with AngularDart, and then compiles all of the Dart
code to JavaScript in order to run browser tests. Here's an example of using
Chrome with Dartdevc:</p>
<pre><code class="language-bash">pub run build_runner test -- -p chrome
</code></pre>
<p>For more information using <code>pub run build_runner test</code>, see the documentation:
<a href="https://github.com/dart-lang/build/tree/master/build_runner#built-in-commands" rel="ugc">https://github.com/dart-lang/build/tree/master/build_runner#built-in-commands</a></p>
</section>
示例代码
<section class="tab-content detail-tab-example-content -active markdown-body">
<p style="font-family: monospace"><b><a href="https://github.com/angulardart-community/angular/blob/master/ngtest/example/README.md" rel="noopener noreferrer nofollow" target="_blank">example/README.md</a></b></p>
<p>See <a href="https://angulardart.xyz/guide/testing" rel="ugc">https://angulardart.xyz/guide/testing</a> for info on how to use this package.</p>
</section>
更多关于Flutter未知功能插件ngtest的使用(由于介绍为undefined,故以“未知功能”代替)的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter未知功能插件ngtest的使用(由于介绍为undefined,故以“未知功能”代替)的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,我可以为你提供一个关于如何使用一个假设的Flutter插件ngtest
的代码示例。由于你提到这个插件的功能是“未知”,我将基于一个通用的Flutter插件使用模式来编写代码。这通常包括导入插件包、初始化插件以及调用插件提供的方法。
首先,假设ngtest
插件已经在pubspec.yaml
文件中添加:
dependencies:
flutter:
sdk: flutter
ngtest: ^0.0.1 # 假设版本号为0.0.1
然后,在Flutter项目中,你可以按照以下步骤使用ngtest
插件:
- 导入插件包
在你的Dart文件中导入ngtest
包:
import 'package:ngtest/ngtest.dart';
- 初始化插件(如果需要)
有些插件可能需要在使用前进行初始化。这里我们假设ngtest
有一个initialize
方法:
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Ngtest.initialize(); // 假设插件有一个初始化方法
runApp(MyApp());
}
- 使用插件提供的功能
由于ngtest
的功能是“未知”,我将假设它有一个名为performUnknownFunction
的方法,该方法返回一个Future
。
import 'package:flutter/material.dart';
import 'package:ngtest/ngtest.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Ngtest.initialize(); // 假设插件有一个初始化方法
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String result = '';
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutter Demo Home Page'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Result: $result',
),
SizedBox(height: 20),
ElevatedButton(
onPressed: _performUnknownFunction,
child: Text('Perform Unknown Function'),
),
],
),
),
);
}
void _performUnknownFunction() async {
try {
// 假设插件有一个返回String的异步方法
String response = await Ngtest.performUnknownFunction();
setState(() {
result = response;
});
} catch (e) {
setState(() {
result = 'Error: ${e.message}';
});
}
}
}
在这个示例中,我们创建了一个简单的Flutter应用,其中包含一个按钮。当用户点击按钮时,将调用Ngtest.performUnknownFunction()
方法,并将结果显示在屏幕上。如果调用失败,将捕获异常并显示错误信息。
请注意,由于ngtest
插件的具体功能和API是未知的,上述代码中的方法名(如initialize
和performUnknownFunction
)以及它们的参数和返回值类型都是假设的。在实际使用中,你需要参考ngtest
插件的官方文档或源代码来了解其正确的使用方法和API。