old_contents: import unittest
  import random
  from validator import StringValidator
  
  
  class StringValidatorClassTest(unittest.TestCase):
      def setUp(self):
          self.stringValidator = StringValidator()
  
      def test_validate_correct1(self):
          result = self.stringValidator.validate("abcdefg", "abcdefg")
          self.assertTrue(result)
  
      def test_validate_correct2(self):
          mpt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
          str1 = ""
          for i in range(0, 15):
              str1 += mpt[random.randint(0, 25)]
  
          str2 = (str1 + '.')[:-1]
  
          self.assertTrue(str1 is not str2)
  
          result = self.stringValidator.validate(str1, str2)
          self.assertTrue(result)
  
      def test_validate_incorrect1(self):
          result = self.stringValidator.validate("abc", "bca")
          self.assertFalse(result)
  
      def test_validate_incorrect2(self):
          result = self.stringValidator.validate("abc", " abc")
          self.assertFalse(result)
  
      def test_validate_incorrect3(self):
          result = self.stringValidator.validate("abc", "abc ")
          self.assertFalse(result)
  
      def test_validate_incorrect_type(self):
          self.assertRaises(TypeError, self.stringValidator.validate("123", 123))
  
new_contents: import unittest
  import random
  from validator import StringValidator
  
  
  class StringValidatorClassTest(unittest.TestCase):
      def setUp(self):
          self.stringValidator = StringValidator()
  
      def test_validate_correct1(self):
          result = self.stringValidator.validate("abcdef", "abcdefg")
          self.assertTrue(result)
  
      def test_validate_correct2(self):
          mpt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
          str1 = ""
          for i in range(0, 15):
              str1 += mpt[random.randint(0, 25)]
  
          str2 = (str1 + '.')[:-1]
  
          self.assertTrue(str1 is not str2)
  
          result = self.stringValidator.validate(str1, str2)
          self.assertTrue(result)
  
      def test_validate_incorrect1(self):
          result = self.stringValidator.validate("abc", "bca")
          self.assertFalse(result)
  
      def test_validate_incorrect2(self):
          result = self.stringValidator.validate("abc", " abc")
          self.assertFalse(result)
  
      def test_validate_incorrect3(self):
          result = self.stringValidator.validate("abc", "abc ")
          self.assertFalse(result)
  
      def test_validate_incorrect_type(self):
          self.assertRaises(TypeError, self.stringValidator.validate("123", 123))
  
subject: Add incorrect testcase