class PetTests(TestCase): def setUp(self): self.pet = Pet(name="test_cat", species="Cat", age=2) def tearDown(self): Pet.query.delete() db.session.commit() def test_image(self): self.assertEqual( self.pet.set_image(), 'https://cdn3.f-cdn.com/ppic/3151051/logo/7139949/cat%20fb.jpg')