C# 单元测试-模拟-可重写的问题-扩展方法
我正在尝试为以下Azure搜索方法编写单元测试:C# 单元测试-模拟-可重写的问题-扩展方法,c#,azure,unit-testing,mocking,moq,C#,Azure,Unit Testing,Mocking,Moq,我正在尝试为以下Azure搜索方法编写单元测试: public async Task Write(ISearchIndexClient indexClient, Search search) { await UploadContents(indexClient, search.SearchContents); } private static async Task UploadContents(ISearchIndexClient indexClient, IReadOnlyColle
public async Task Write(ISearchIndexClient indexClient, Search search)
{
await UploadContents(indexClient, search.SearchContents);
}
private static async Task UploadContents(ISearchIndexClient indexClient, IReadOnlyCollection<dynamic> searchContents) => await Task.Run(() => indexClient.Documents.Index(IndexBatch.Upload(searchContents)));
公共异步任务写入(ISearchIndexClient indexClient,搜索)
{
等待上传内容(indexClient、search.SearchContents);
}
私有静态异步任务上载内容(ISearchIndexClient indexClient,IReadOnlyCollection searchContents)=>等待任务运行(()=>indexClient.Documents.Index(IndexBatch.Upload(searchContents));
单元测试代码1:
public async Task Write_Success()
{
var searchIndexClientMock = new Mock<ISearchIndexClient>();
searchIndexClientMock
.Setup(x => x.Documents.Index(It.IsAny<IndexBatch<Document>>(), It.IsAny<SearchRequestOptions>()))
.Returns(It.IsAny<DocumentIndexResult>()).Callback(() => IndexBatch.Upload(It.IsAny<IEnumerable<Document>>()));
var pushFunction = new SearchIndexWriter();
Search search = new Search();
await pushFunction.Write(searchIndexClientMock.Object, search);
//Assert, Verify checks
}
公共异步任务写入成功()
{
var searchIndexClientMock=new Mock();
searchIndexClientMock
.Setup(x=>x.Documents.Index(It.IsAny(),It.IsAny())
.Returns(It.IsAny()).Callback(()=>IndexBatch.Upload(It.IsAny());
var pushFunction=新的SearchIndexWriter();
搜索=新搜索();
等待pushFunction.Write(searchIndexClientMock.Object,search);
//断言、验证检查
}
我得到以下错误:
消息:System.NotSupportedException:不支持的表达式:…=>。。。。索引(It.IsAny>(),It.IsAny())
在设置/验证表达式中不能使用扩展方法(此处:DocumentsOperationsExtensions.Index)
单元测试代码2:
public async Task Write_Success()
{
var searchIndexClientMock = new Mock<ISearchIndexClient>();
searchIndexClientMock
.SetupGet(x => x.Documents).Returns(It.IsAny<IDocumentsOperations>());
var pushFunction = new SearchIndexWriter();
var search = new Search()
{
SearchContents = new List<dynamic>(),
};
await pushFunction.Write(searchIndexClientMock.Object, search);
//Verify, Assert logic
}
公共异步任务写入成功()
{
var searchIndexClientMock=new Mock();
searchIndexClientMock
.SetupGet(x=>x.Documents).Returns(It.IsAny());
var pushFunction=新的SearchIndexWriter();
var search=新搜索()
{
SearchContents=新列表(),
};
等待pushFunction.Write(searchIndexClientMock.Object,search);
//验证、断言逻辑
}
我得到以下错误:
消息:System.NullReferenceException:对象引用未设置为对象的实例。
在Microsoft.Azure.Search.DocumentsOperationsExtensions.IndexAsync[T](IDocumentsOperations,IndexBatch ^1批,SearchRequestOptions SearchRequestOptions,CancellationToken CancellationToken)
在Microsoft.Azure.Search.DocumentsOperationsExtensions.Index[T](IDocumentsOperations,IndexBatch ^1批,SearchRequestOptions SearchRequestOptions) 如何测试上传功能?根据文档 只有一个方法
索引
,它有两个参数
在UploadContent
方法中,Index方法只传递一个参数。这两个项目是否存在版本差异
而且
searchIndexClientMock
.SetupGet(x => x.Documents).Returns(It.IsAny<IDocumentsOperations>());
SearchIndexClientLock
.SetupGet(x=>x.Documents).Returns(It.IsAny());
在设置中,返回应该是一个具体实例,而不是执行它。IsAny()您基本上是在尝试测试第三方依赖项的功能。尽管这些依赖项有可以模仿的抽象,但它们需要不必要的设置来隔离它们进行单元测试,这对我来说是一种代码味道 我建议抽象出第三方依赖关系
private readonly ISearchService service;
//...assuming service injected
public SearchIndexWriter(ISearchService service) {
this.service = service;
}
public Task Write(ISearchIndexClient indexClient, Search search) {
return service.UploadContents(indexClient, search.SearchContents);
}
public class SearchService : ISearchService {
private Task UploadContents(ISearchIndexClient indexClient, IReadOnlyCollection<dynamic> searchContents)
=> indexClient.Documents.IndexAsync(IndexBatch.Upload(searchContents));
}
尽量避免与静态问题紧密耦合,因为这会使隔离的单元测试变得困难
服务定义可以如下所示
public interface ISearchService {
Task UploadContents(ISearchIndexClient indexClient, IReadOnlyCollection<dynamic> searchContents);
}
公共接口ISearchService{
任务上载内容(ISearchIndexClient indexClient、IReadOnlyCollection searchContents);
}
用一个简单的实现包装外部依赖关系
private readonly ISearchService service;
//...assuming service injected
public SearchIndexWriter(ISearchService service) {
this.service = service;
}
public Task Write(ISearchIndexClient indexClient, Search search) {
return service.UploadContents(indexClient, search.SearchContents);
}
public class SearchService : ISearchService {
private Task UploadContents(ISearchIndexClient indexClient, IReadOnlyCollection<dynamic> searchContents)
=> indexClient.Documents.IndexAsync(IndexBatch.Upload(searchContents));
}
公共类搜索服务:ISearchService{
私有任务上载内容(ISearchIndexClient indexClient、IReadOnlyCollection searchContents)
=>indexClient.Documents.IndexAsync(IndexBatch.Upload(searchContents));
}
不要过分强调测试你无法控制的代码。相反,把注意力集中在你可以控制的逻辑上
public async Task Write_Success() {
//Arrange
var serviceMock = new Mock<ISearchService>();
serviceMock
.Setup(_ => _.UploadContents(It.IsAny<ISearchIndexClient>(), It.IsAny<IReadOnlyCollection<It.AnyType>>())
.ReturnsAsync(new object());
var searchIndexClientMock = Mock.Of<ISearchIndexClient>();
var pushFunction = new SearchIndexWriter(serviceMock.Object);
Search search = new Search();
//Act
await pushFunction.Write(searchIndexClientMock.Object, search);
//Assert, Verify checks
//...
}
公共异步任务写入成功(){
//安排
var serviceMock=new Mock();
serviceMock
.Setup(=>u.UploadContents(It.IsAny(),It.IsAny())
.ReturnsAsync(新对象());
var searchIndexClientMock=Mock.Of();
var pushFunction=新的SearchIndexWriter(serviceMock.Object);
搜索=新搜索();
//表演
等待pushFunction.Write(searchIndexClientMock.Object,search);
//断言、验证检查
//...
}