如何使 json 序列化的 httpclient 模拟方法通用

Question

我有以下私有方法允许我模拟并因此测试 HttpClient

private Mock<HttpClient> GetMockHttClient(HttpStatusCode desiredStatusCode, User user)
{
    var httpMessageHandler = new Mock<HttpMessageHandler>();
    
    httpMessageHandler.Protected()
        .Setup<Task<HttpResponseMessage>>(
            "SendAsync",
            ItExpr.IsAny<HttpRequestMessage>(),
            ItExpr.IsAny<CancellationToken>()
        )
        .ReturnsAsync((HttpRequestMessage request, CancellationToken token) =>
        {
            var response = new HttpResponseMessage
            {
                Content = new StringContent(JsonSerializer.Serialize(user)), //<-- this could be anything
                ReasonPhrase = null,
                RequestMessage = null,
                StatusCode = desiredStatusCode,
                Version = new Version(1, 0)
            };
            return response;
        });

    var httpClientMock = new Mock<HttpClient>(httpMessageHandler.Object)
    {
        Object =
        {
            BaseAddress = new Uri("[Redacted]")
        }
    };

    return httpClientMock;
    }

现在我正在传递一个 User 对象，但是我还有其他测试，例如我可能想要 int[] 序列化或 List<User> 序列化。

复制并粘贴此方法并更改我希望序列化的对象似乎很荒谬，那么如何使此方法通用，以便在调用它时指定将序列化为的类型json.

Answer 1

private Mock<HttpClient> GetMockHttClient<TModel>(HttpStatusCode desiredStatusCode, TModel model)
{
    var httpMessageHandler = new Mock<HttpMessageHandler>();
    
    httpMessageHandler.Protected()
        .Setup<Task<HttpResponseMessage>>(
            "SendAsync",
            ItExpr.IsAny<HttpRequestMessage>(),
            ItExpr.IsAny<CancellationToken>()
        )
        .ReturnsAsync((HttpRequestMessage request, CancellationToken token) =>
        {
            var response = new HttpResponseMessage
            {
                Content = new StringContent(JsonSerializer.Serialize<TModel>(model)),
                ReasonPhrase = null,
                RequestMessage = null,
                StatusCode = desiredStatusCode,
                Version = new Version(1, 0)
            };
            return response;
        });

    var httpClientMock = new Mock<HttpClient>(httpMessageHandler.Object)
    {
        Object =
        {
            BaseAddress = new Uri("[Redacted]")
        }
    };

    return httpClientMock;
}

如何使 json 序列化的 httpclient 模拟方法通用

How to make httpclient mock method generic for json serialization

c#

generics

moq

dotnet-httpclient