[英]How to write test for flutter package Flutter WeChat Assets Picker
我正在尝试使用 Mocktail 包https://pub.dev/packages/mocktail对此颤振包https://pub.dev/packages/wechat_assets_picker编写测试,但该包似乎没有在文档中进行测试.
我已经包含了最小的可重现示例。 测试文件当前不工作,它包含在使用flutter Mocktail 包的示例测试代码中。
它应该模拟 AssetPicker.pickAssets 以测试它是否实际上是用正确的参数调用的。 我是在IOS模拟器上运行的,我们需要在ios/Runer/Info.plist
添加这个key,否则点击添加按钮后模拟器会意外关闭。
import 'package:flutter/material.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: const [],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () async {
final List<AssetEntity>? result =
await AssetPicker.pickAssets(context);
},
tooltip: 'Add photo',
child: const Icon(Icons.add),
),
);
}
}
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mocktail/mocktail.dart';
import 'package:wechat/main.dart';
import 'package:wechat_assets_picker/wechat_assets_picker.dart';
class _MockAssetPicker extends Mock implements AssetPicker {}
void main() {
testWidgets('It should call the WeChat asset picker',
(WidgetTester tester) async {
await tester.pumpWidget(const MyApp());
final BuildContext context = tester.element(find.byType(MyApp));
final assetPickerMock = _MockAssetPicker();
when(() => assetPickerMock.pickAssets(context)).thenAnswer((_) => Future.value([
const AssetEntity(
id: 'id1',
typeInt: 1,
width: 100,
height: 100,
),
]));
AssetPicker.instance = assetPickerMock;
await tester.tap(find.byIcon(Icons.add));
await tester.pump();
verify(() => assetPickerMock.pickAssets(context)).called(1);
});
}
分离的选择器代表支持模拟选择器: https ://github.com/fluttercandies/flutter_wechat_assets_picker/pull/315
TL;DR,先建立自己的委托,然后通过AssetPicker.setPickerDelegate(TestAssetPickerDelegate());
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