class TestPreferences Dynamically adds test methods for testing relate

class TestPreferences:
    """
    Dynamically adds test methods for testing related preferences for objects. For example:

    @TestPreferences([('status', TaskStatusFactory), ('importance', TaskImportanceFactory)])
    class TaskApiTestCase(..., APITestCase):
        ...

    TaskApiTestCase will be dynamically extended with test methods for ensuring that it's not possible to use status
    or importance from another organization.
    """
    def __init__(self, preferences):
        self.preferences = preferences

    def __call__(self, cls):
        if self.preferences is not None:
            for field_name, pref_factory in self.preferences:
                template_methods = inspect.getmembers(TestPreferences, inspect.ismethod)

                for name, tempalte_method in template_methods:
                    if name.startswith('template_'):
                        test_method_name_template, test_method = tempalte_method(field_name, pref_factory)
                        test_method_name = test_method_name_template % {'field_name': field_name}
                        setattr(cls, test_method_name, test_method)

        return cls

    @staticmethod
    def template_create_global(field_name, pref_factory):
        def method(self):
            self.client.force_authenticate(self.user)
            user_org = OrganizationMembership.objects.get_primary(self.user).organization

            sub_matter = SubMatterFactory(matter__organization=user_org)
            preference = pref_factory(organization=None)

            res = self._post_request(sub_matter=sub_matter.pk, **{field_name: preference.pk})
            self.assertEqual(res.status_code, status.HTTP_201_CREATED, res.data)
            self.assertEqual(res.data[field_name], preference.pk)

        return "test_can_use_global_%(field_name)s", method