A HTTP Handler that can be used for testing purposes. Use the WSGI interface to compose requests, but return the raw HttpResponse object with the originating WSGIRequest attached to its ``wsgi_request`` attribute.
Simulate the behavior of most Web servers by removing the content of responses for HEAD requests, 1xx, 204, and 304 responses. Ensure compliance with RFC 7230, section 3.3.3.
The key will be used as the form data name; the value will be transmitted
as content. If the value is a file, the contents of the file will be sent
as an application/octet-stream; otherwise, str(value) will be sent.