text: import unittest
  
  from say import say
  
  
  # test cases adapted from `x-common//canonical-data.json` @ version: 1.0.0
  
  class SayTest(unittest.TestCase):
      def test_zero(self):
          self.assertEqual(say(0), "zero")
  
      def test_one(self):
          self.assertEqual(say(1), "one")
  
      def test_fourteen(self):
          self.assertEqual(say(14), "fourteen")
  
      def test_eighteen(self):
          self.assertEqual(say(18), "eighteen")
  
      def test_fifty(self):
          self.assertEqual(say(50),"fifty")
  
      def test_twenty(self):
          self.assertEqual(say(20), "twenty")
  
      def test_twenty_two(self):
          self.assertEqual(say(22), "twenty-two")
  
      def test_ninety_eight(self):
          self.assertEqual(say(98), "ninety-eight")
  
      def test_one_hundred(self):
          self.assertEqual(say(100), "one hundred")
  
      # additional track specific test
      def test_one_hundred_twenty(self):
          self.assertEqual(say(120), "one hundred and twenty")
  
      def test_one_hundred_twenty_three(self):
          self.assertEqual(say(123), "one hundred and twenty-three")
  
      def test_one_thousand(self):
          self.assertEqual(say(1000), "one thousand")
  
      def test_one_thousand_two_hundred_thirty_four(self):
          self.assertEqual(say(1234), "one thousand two hundred and thirty-four")
  
      # additional track specific test
      def test_eight_hundred_and_ten_thousand(self):
          self.assertEqual(say(810000), "eight hundred and ten thousand")
  
      def test_one_million(self):
          self.assertEqual(say(1e6), "one million")
  
      # additional track specific test
      def test_one_million_two(self):
          self.assertEqual(say(1000002), "one million and two")
  
      def test_1002345(self):
          self.assertEqual(
              say(1002345),
              "one million two thousand three hundred and forty-five")
  
      def test_one_billion(self):
          self.assertEqual(say(1e9), "one billion")
  
      def test_987654321123(self):
          self.assertEqual(
              say(987654321123), ("nine hundred and eighty-seven billion "
                                  "six hundred and fifty-four million "
                                  "three hundred and twenty-one thousand "
                                  "one hundred and twenty-three"))
  
      def test_number_to_large(self):
          with self.assertRaises(AttributeError):
              say(1e12)
  
      def test_number_negative(self):
          with self.assertRaises(AttributeError):
              say(-1)
  
  
  if __name__ == '__main__':
      unittest.main()
  