'Configure XQueue stub to POST `response_dict` (a dictionary)
back to the LMS when it receives a submission that contains the string
`pattern`.
Remember that there is one XQueue stub shared by all the tests;
if possible, you should have tests use unique queue names
to avoid conflict between tests running in parallel.'

def __init__(self, pattern, response_dict):

    self._pattern = pattern
    self._response_dict = response_dict
