def test_is_child(self):
category = factories.CategoryFactory(name='Child category', parent=None)
self.assertFalse(category.is_child())
category.parent = self.category
category.save()
self.assertTrue(category.is_child())
def test_is_parent(self):
self.assertFalse(self.category.is_parent())
child_category = factories.CategoryFactory(name='Child category')
child_category.parent = self.category
child_category.save()
self.category.refresh_from_db()
self.assertTrue(self.category.is_parent())