Question

我已经模拟了异步函数，但是每当我调用模拟函数时，它都会返回空值。

我具有如下所示的异步功能

public async Task<TResult> InvokeAzureFunctionWithTokenGetResultAsync<TArg, TResult>(TArg arg, string functionUri, string resourceid, CancellationToken canceltoken)

我想编写xUnit测试用例，因为我无法执行实际功能，因此我试图对其进行模拟。执行时没有错误，但是调用函数时，我得到的是空。

实际功能

public async Task<TResult> InvokeAzureFunctionWithTokenGetResultAsync<TArg, TResult>(TArg arg, string functionUri, string resourceid, CancellationToken canceltoken)
{
    // some external code here

    if (message != null && (message.StatusCode == HttpStatusCode.OK || message.StatusCode == HttpStatusCode.Created))
    {
        try
        {
            return JsonConvert.DeserializeObject<TResult>(await message.Content.ReadAsStringAsync().ConfigureAwait(true));
        }
        catch (JsonReaderException re)
        {
            throw new FormatException(re.Message, re);
        }
        catch (FormatException fe)
        {
            throw new FormatException(fe.Message, fe);
        }
    }
    else if (message != null)
    {
        throw new FormatException(message.ReasonPhrase);
    }

    return default(TResult);
}

测试功能

IHttpEndpointInvoker httpEndpointInvoker = new HttpEndpointInvoker();

IHttpEndpointInvoker httpEndpointInvoker = new HttpEndpointInvoker();

try
{
    var mock = new Mock<IHttpEndpointInvoker>();

    var obj = (new RouteDefinition() { Id = routeDefinitionId, IoTHubId = "" });

    mock.Setup(s => s.InvokeAzureFunctionWithTokenGetResultAsync<RouteDefinition, string>(It.IsIn<RouteDefinition>(), It.IsAny<string>(), It.IsAny<string>(), new CancellationTokenSource().Token)).Returns(Task.Factory.StartNew(() => GetHttpResponseMessage(HttpStatusCode.Accepted).Result));

    var o1 = mock.Object.InvokeAzureFunctionWithTokenGetResultAsync<RouteDefinition, string>(obj, "functionUri", "resourceid", new CancellationTokenSource().Token).GetAwaiter().GetResult(); // this line is returning null. But I am expecting value that is returned by "GetHttpResponseMessage" function


}
catch (Exception ex)
{

    throw;
}

注意：已成功调用“ GetHttpResponseMessage”并返回一个字符串。我已经调试了。

请检查上面代码中给出的带有以下注释的行，以获取预期的输出/结果。

//此行返回null。但我期望“ GetHttpResponseMessage”函数返回的值

模拟异步方法时单元测试失败，C＃

0 个答案: