如何为httpclient getasync方法创建模拟?

本文介绍了如何为httpclient getasync方法创建模拟?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用Moq为单元测试创​​建模拟，但是当我不得不为httpclient的getasync方法创建模拟时，我陷入了困境.以前我使用的是SendAsync方法，为此，我可以使用以下代码:

I am using Moq to create mocks for my unit tests but I am stuck when I have to create mock for getasync method of httpclient. Previously I was using SendAsync method and for that I could use the below code:

var mockResponse = new HttpResponseMessage(HttpStatusCode.OK) {Content = new StringContent(expectedResponse)}; mockResponse.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json"); var mockHandler = new Mock<DelegatingHandler>(); mockHandler .Protected() .Setup<Task<HttpResponseMessage>>( "SendAsync", ItExpr.Is<HttpRequestMessage>( message => message.Headers.Contains("Authorization") && message.Headers.Authorization.Parameter.Equals(accessToken) && message.Headers.Authorization.Scheme.Equals("Bearer") && message.RequestUri.AbsoluteUri.Contains(baseUrl) ), ItExpr.IsAny<CancellationToken>()) .Returns(Task.FromResult(mockResponse));

现在我有一个方法:

private async Task<List<Model>> GetData() { string url = url; _httpClient.BaseAddress = new Uri(url); _httpClient.DefaultRequestHeaders.Add(Headers.AuthorizationHeader, "Bearer" + "token"); var response = await _httpClient.GetAsync(url); response.EnsureSuccessStatusCode(); return await response.Content.ReadAsAsync<List<Model>>(); }

现在我可以为此方法(getasync)创建模拟了吗?有帮助吗?

Now can I create mock for this method (getasync)? Any help?

推荐答案

内部GetAsync最终将调用SendAsync.

public Task<HttpResponseMessage> GetAsync(Uri requestUri, HttpCompletionOption completionOption, CancellationToken cancellationToken) { return SendAsync(new HttpRequestMessage(HttpMethod.Get, requestUri), completionOption, cancellationToken); }

源代码

松开ItExpr期望，您应该能够使其表现出预期的效果.

Loosen the ItExpr expectation and you should be able to get it to behave as expected.

使用最初提供的示例

mockHandler .Protected() .Setup<Task<HttpResponseMessage>>( "SendAsync", ItExpr.IsAny<HttpRequestMessage>(), ItExpr.IsAny<CancellationToken>() ) .ReturnsAsync(mockResponse);