Как тестировать django?

def group_required(*group_names):
    """Requires user membership in at least one of the groups passed in."""
    def in_groups(user):
        groups = ['SMD-'+i for i in group_names]
        return has_access(user, groups)
    return user_passes_test(in_groups)


def has_access(user, groups):
    if user.groups.filter(name__in=groups).exists():
        return True
    else:
        raise PermissionDenied