text: import unittest
  from main import *
  
  class StrictlyLessThanOperatorTests(unittest.TestCase):
      def test_main(self):
          self.assertIsNotNone(strictly_less_than(1))
          self.assertIsInstance(strictly_less_than(1), str)
          self.assertEqual(strictly_less_than(1), "Less than 10")
          self.assertEqual(strictly_less_than(9), "Less than 10")
          self.assertEqual(strictly_less_than(10), "Less than 100")
          self.assertEqual(strictly_less_than(99), "Less than 100")
          self.assertEqual(strictly_less_than(100), "100 or more")
          self.assertEqual(strictly_less_than(110), "100 or more")
  
      def test_operator_presence(self):
          f = open('main.py')
          lines = str(f.readlines())
          f.close()
          self.assertRegex(lines, '<', msg="The < operator is not in the function definition")
  