def METHOD_NAME(self):
    parser = self.get_parser('collaboration.bpmn')
    self.assertEqual(list(parser.messages.keys()), ['love_letter', 'love_letter_response'])
    self.assertEqual(parser.correlations,
                     {'lover_name': {'name': "Lover's Name",
                                     'retrieval_expressions': [
                                         {'expression': 'lover_name',
                                          'messageRef': 'love_letter'},
                                         {'expression': 'from_name',
                                          'messageRef': 'love_letter_response'}]}}
                     )