module ActionDispatch::Assertions::ResponseAssertions

def assert_response(type, message = nil)


assert_response 401
# assert that the response code was status code 401 (unauthorized)

assert_response :redirect
# assert that the response was a redirection

==== Examples

See Rack::Utils::SYMBOL_TO_STATUS_CODE for a full list.
or its symbolic equivalent assert_response(:not_implemented).
You can also pass an explicit status number like assert_response(501)

* :error - Status code was in the 500-599 range
* :missing - Status code was 404
* :redirect - Status code was in the 300-399 range
* :success - Status code was 200

Asserts that the response is one of the following types: 
def assert_response(type, message = nil)
  validate_request!
  if type.in?([:success, :missing, :redirect, :error]) && @response.send("#{type}?")
    assert_block("") { true } # to count the assertion
  elsif type.is_a?(Fixnum) && @response.response_code == type
    assert_block("") { true } # to count the assertion
  elsif type.is_a?(Symbol) && @response.response_code == Rack::Utils::SYMBOL_TO_STATUS_CODE[type]
    assert_block("") { true } # to count the assertion
  else
    flunk(build_message(message, "Expected response to be a <?>, but was <?>", type, @response.response_code))
  end
end