def test_true_2(self): self.assertTrue(validate_pin('123456'))
def test_true(self): self.assertTrue(validate_pin('1111'))
def test_false_3(self): self.assertFalse(validate_pin('1234567'))
def test_false_4(self): self.assertFalse(validate_pin('-1234'))
def test_false_2(self): self.assertFalse(validate_pin('1'))