def test_checkZipCode_validString_returnTrue(self):
     self.assertTrue(Validator.check_zip_code("4253"))
 def test_checkZipCode_containsLetterString_returnFalse(self):
     self.assertFalse(Validator.check_zip_code("7z45"))
 def test_checkZipCode_beginsWithZeroString_returnFalse(self):
     self.assertFalse(Validator.check_zip_code("0545"))
 def test_checkZipCode_operatorInString_returnFalse(self):
     self.assertFalse(Validator.check_zip_code("+5243"),(Validator.check_zip_code("-4265")))
 def test_checkZipCode_longString_returnFalse(self):
     self.assertFalse(Validator.check_zip_code("42643"))