ShimNotImplementedException：System.Net.Http.HttpMessageInvoker.Dispose（）(ShimNotImplementedException

ShimNotImplementedException：System.Net.Http.HttpMessageInvoker.Dispose（）(ShimNotImplementedException : System.Net.Http.HttpMessageInvoker.Dispose())

我正在使用一个垫片（由Visual Studio生成）伪造一个HttpClient实例。 下面是SUT：

public class ExampleForSO { private HttpClient _httpClient; public ExampleForSO(HttpClient httpClient) { _httpClient = httpClient; } public async Task<List<string>> GetListAsync() { using (_httpClient) { return await GetListFromHostAsync(_httpClient); } } public async Task<List<string>> GetListFromHostAsync(HttpClient httpClient) { var responseJson = await httpClient.GetAsync("abc") .Result.Content.ReadAsStringAsync() ; var fList = JsonConvert.DeserializeObject<List<string>>(responseJson); return fList; }

这是单元测试：

[TestMethod] public void TestMethod1() { // Create a fake HttpClient using (ShimsContext.Create()) { var fake = new ShimHttpClient() { GetAsyncString = (uri) => { var hrm = new HttpResponseMessage(HttpStatusCode.OK); var list = new List<string>() {"file1", "file2"}; hrm.Content = new StringContent(JsonConvert.SerializeObject(list)); var t = new Task<HttpResponseMessage>(() => hrm); return Task.Run(() => hrm); } }; var _exampleForSO = new ExampleForSO(fake); var returnValue = _exampleForSO.GetListAsync(); // This line will throw an exception: var value = returnValue.Result; Assert.IsNotNull(returnValue); } }

当我运行它时，shim会抛出一个ShimNotImplemented异常。 堆栈跟踪显示：

$Action1NotImplemented71f6f23c-d227-4cb6-ac76-1f8c8094c413.Invoke(HttpMessageInvoker arg1) at System.Net.Http.HttpMessageInvoker.Dispose()

如果我using (_httpClient)注释掉行，单元测试将在不抛出异常的情况下运行，但这对于生产来说不是一个好的解决方案。 我的问题，如何将函数分配给System.Net.Http.HttpMessageInvoker.Dispose（）shim委托？ 我无法在任何地方找到它的引用。 我是否必须为HttpMessageInvoker创建一个假的并分配给另一个垫片属性？

I am using a shim (generated by Visual Studio) to fake an HttpClient instance. Below is SUT:

public class ExampleForSO { private HttpClient _httpClient; public ExampleForSO(HttpClient httpClient) { _httpClient = httpClient; } public async Task<List<string>> GetListAsync() { using (_httpClient) { return await GetListFromHostAsync(_httpClient); } } public async Task<List<string>> GetListFromHostAsync(HttpClient httpClient) { var responseJson = await httpClient.GetAsync("abc") .Result.Content.ReadAsStringAsync() ; var fList = JsonConvert.DeserializeObject<List<string>>(responseJson); return fList; }

Here is the unit test:

[TestMethod] public void TestMethod1() { // Create a fake HttpClient using (ShimsContext.Create()) { var fake = new ShimHttpClient() { GetAsyncString = (uri) => { var hrm = new HttpResponseMessage(HttpStatusCode.OK); var list = new List<string>() {"file1", "file2"}; hrm.Content = new StringContent(JsonConvert.SerializeObject(list)); var t = new Task<HttpResponseMessage>(() => hrm); return Task.Run(() => hrm); } }; var _exampleForSO = new ExampleForSO(fake); var returnValue = _exampleForSO.GetListAsync(); // This line will throw an exception: var value = returnValue.Result; Assert.IsNotNull(returnValue); } }

When I run this the shim throws a ShimNotImplemented exception. The stack trace shows this:

$Action1NotImplemented71f6f23c-d227-4cb6-ac76-1f8c8094c413.Invoke(HttpMessageInvoker arg1) at System.Net.Http.HttpMessageInvoker.Dispose()

If I comment out the line using (_httpClient), the unit test will run without throwing the exception, but that is not a good solution for production. My question, how can I assign a function to the System.Net.Http.HttpMessageInvoker.Dispose() shim delegate? I am not able to find a reference to it anywhere. Do I have to create a fake for the HttpMessageInvoker to and assign to another shim property?

最满意答案

你试过这个： Visual Studio 2013 Update 4改变MSFakes Shim对象默认行为基本上，调用Microsoft.QualityTools.Testing.Fakes.Shims.ShimBehaviors.BehaveAsDefaultValue（）; 在实例化垫片之前

did you try this: Visual Studio 2013 Update 4 Changes MSFakes Shim Object Default Behaviour basically, call Microsoft.QualityTools.Testing.Fakes.Shims.ShimBehaviors.BehaveAsDefaultValue(); before instantiating the shim