hc2.cs

// Arrange
var options = new HttpClientInterceptorOptions {ThrowOnMissingRegistration = true};
new HttpRequestInterceptionBuilder()
    .Requests()
    .ForHttps()
    .ForHost("bbc.co.uk")
    .ForPath("/news")
    .Responds()
    .WithStatus(500)
    .RegisterWith(options);

new HttpRequestInterceptionBuilder()
    .Requests()
    .ForHttps()
    .ForHost("bbc.co.uk")
    .ForPath("/sport")
    .Responds()
    .WithStatus(404)
    .RegisterWith(options);

// Act
var client = options.CreateHttpClient();
var news = await client.GetAsync("https://bbc.co.uk/news");
var sport = await client.GetAsync("https://bbc.co.uk/sport");

// Assert
news.StatusCode.ShouldBe(HttpStatusCode.InternalServerError);
sport.StatusCode.ShouldBe(HttpStatusCode.NotFound);