kassemsandarusi/MockHttpClient

Easily mock `HttpClient` for testing

MockHttpClient

Easily mock HttpClient for testing

//Arrange
var mockHttpClient = new MockHttpClient();
mockHttpClient.When("http://www.google.com").Returns(HttpStatusCode.OK)

//Act
var response = await client.GetAsync(requestUri);

//Assert
Assert.Equal(HttpStatusCode.OK, response);

url matching

You can specify partial and wildcarded urls in the when condition to match across many differnt urls. Below are a few example of how to specify url queries

mockHttpClient.When([url string]).Returns(HttpStatusCode.OK)

url string	matches
http://mockhttpclient.local/path/to/resource	matches full Url
http://mockhttpclient.local/path/to/*	matches paths starting with /path/to
http://mockhttpclient.local/path/*/resource)	matches paths starting with /path and ending with /resource
http://*.local/path/to/resource)	matches paths with domains ending in .local and paths starting with /path/to/resource
http//mockhttpclient.local/*	matches everything at the domain mockhttpclient.local
//mockhttpclient.local/path/to/resource	matches https and http
/path/to/resource	matches all paths at /path/to/resource regardless of domain
/path/to/resource?type=test	matches all paths at /path/to/resource and have query string value type=test
?type=test	matches all urls that have query string value type=test
?type=test&q=*	matches all urls that have query string value type=test and have value q that can be anything

slightly more complicated matching

If you want to do something more than the simple examples above, the when method can take a Func<HttpRequestMessage, bool>, while the then method can take a Func<HttpRequestMessage, HttpResponseMessage>. This allows you to create more complicated conditions and responses.

The library also provides some helper extension methods to do common checks on HttpRequestMessage and to set some common properties on HttpResponseMessages

client
    .When(req => req.HasHeader("accept", "application/json"))
    .Then(req => new HttpResponseMessage()
            .WithHeader("version", "1")
            .WithJsonContent(new
            {
                FirstName = "John",
                LastName = "Doe"
            }));