def load(self, requirements_file=None):
        """Load or reload requirements from a requirements.txt file.

        :param requirements_file: if not given, the filename used from
            initialization will be read again.
        """
        if requirements_file is None:
            requirements_file = self.filename
            if requirements_file is None:
                raise ValueError("no filename provided")
        elif isinstance(requirements_file, text_type):
            requirements_file = Path(requirements_file)
        self.clear()
        with requirements_file.open() as f:
            self.loads(f.read())

        if isinstance(requirements_file, (text_type, Path)):
            self.filename = requirements_file
def setUp(self):
        self.credentials = {
            'username': 'testuser',
            'password': 'test1234',
            'email': 'test@mail.com'}

        # Create a test Group
        my_group, created = Group.objects.get_or_create(name='test_group')

        # Add user to test Group
        User.objects.get(pk=1).groups.add(my_group)