def test_successful_donations_with_letters(self): self.assertFalse(Event.is_valid_successful_donations("GGG"))
def test_successful_donations_with_empty_string(self): self.assertFalse(Event.is_valid_successful_donations(""))
def test_successful_donations_with_valid_string(self): self.assertTrue(Event.is_valid_successful_donations("666"))