WireMock.Net如何响应有时会出现错误，其他情况都可以

Question

我正在使用WireMock.Net，我想用相同的URI配置Wiremock，它有时返回OK(200)，有时返回错误响应(500)。我见过的示例总是返回相同的状态码，例如：

WireMockServer.Given(Request.Create().WithPath("/some/thing").UsingGet())
    .RespondWith(
        Response.Create()
            .WithStatusCode(200)
            .WithBody("Hello world!"));

例如，我如何模拟:在偶数请求上返回OK (200)，在奇数请求上返回Internal-Server-Error (500)。我也想回应不同的身体。

Answer 1

过了一段时间，我查看了WireMock存储库，找到了一种方法。这只是一个例子(这不是你能写的最好的代码)：

WireMockServer.Given(Request.Create().WithPath("/some/thing").UsingPost())
                .RespondWith(new CustomResponse());

CustomResponse实现了IResponseProvider

public class CustomResponse : IResponseProvider
{
    private static int _count = 0;
    public Task<(ResponseMessage Message, IMapping Mapping)> ProvideResponseAsync(RequestMessage requestMessage, IWireMockServerSettings settings)
    {
        ResponseMessage response;
        if (_count % 2 == 0)
        {
            response = new ResponseMessage() { StatusCode = 200 };
            SetBody(response, @"{ ""msg"": ""Hello from wiremock!"" }");
        }
        else
        {
            response = new ResponseMessage() { StatusCode = 500 };
            SetBody(response, @"{ ""msg"": ""Hello some error from wiremock!"" }");
        }

        _count++;
        (ResponseMessage, IMapping) tuple = (response, null);
        return Task.FromResult(tuple);
    }

    private void SetBody(ResponseMessage response, string body)
    {
        response.BodyDestination = BodyDestinationFormat.SameAsSource;
        response.BodyData = new BodyData
        {
            Encoding = Encoding.UTF8,
            DetectedBodyType = BodyType.String,
            BodyAsString = body
        };
    }
}

Answer 2

如果你总是想让响应交替，你可以只使用simple scenario。

WireMockServer.Given(Request.Create()
    .WithPath("/some/thing")
    .UsingGet())
    .InScenario("MyScenario")
    .WhenStateIs("Started")
    .WillSetStateTo("Something")
    .RespondWith(
        Response.Create()
            .WithStatusCode(200)
            .WithBody("Hello world!"));

WireMockServer.Given(Request.Create()
    .WithPath("/some/thing")
    .UsingGet())
    .InScenario("MyScenario")
    .WhenStateIs("Something")
    .WillSetStateTo("Started")
    .RespondWith(
        Response.Create()
            .WithStatusCode(500)
            .WithBody("Error"));