def test_one_hundred_forty_four(self): self.assertEqual(int_to_english(144), 'one hundred forty four')
def test_thirty(self): self.assertEqual(int_to_english(30), 'thirty')
def test_forty(self): self.assertEqual(int_to_english(40), 'forty')
def test_nineteen(self): self.assertEqual(int_to_english(19), 'nineteen')
def test_zero(self): self.assertEqual(int_to_english(0), 'zero')
def test_fifteen(self): self.assertEqual(int_to_english(15), 'fifteen')
def test_seventeen(self): self.assertEqual(int_to_english(17), 'seventeen')
def test_three(self): self.assertEqual(int_to_english(3), 'three')
def test_four(self): self.assertEqual(int_to_english(4), 'four')
def test_nine_thousand_nine_hundred_ninety_nine(self): self.assertEqual(int_to_english(9999), 'nine thousand nine hundred ninety nine')
def test_really_big_number(self): self.assertEqual(int_to_english(15512111111111), 'fifteen trillion five hundred twelve billion one hundred eleven million one hundred eleven thousand one hundred eleven')
def test_seven_thousand_four_hundred_eight(self): self.assertEqual(int_to_english(7408), 'seven thousand four hundred eight')
def test_one_thousand(self): self.assertEqual(int_to_english(1000), 'one thousand')
def test_two(self): self.assertEqual(int_to_english(2), 'two')
def test_thirteen(self): self.assertEqual(int_to_english(13), 'thirteen')
def test_five(self): self.assertEqual(int_to_english(5), 'five')
def test_fourteen(self): self.assertEqual(int_to_english(14), 'fourteen')
def test_six(self): self.assertEqual(int_to_english(6), 'six')
def test_sixteen(self): self.assertEqual(int_to_english(16), 'sixteen')
def test_eight(self): self.assertEqual(int_to_english(8), 'eight')
def test_eighteen(self): self.assertEqual(int_to_english(18), 'eighteen')
def test_nine(self): self.assertEqual(int_to_english(9), 'nine')
def test_twenty(self): self.assertEqual(int_to_english(20), 'twenty')
def test_ten(self): self.assertEqual(int_to_english(10), 'ten')
def test_twenty_one(self): self.assertEqual(int_to_english(21), 'twenty one')
def test_eleven(self): self.assertEqual(int_to_english(11), 'eleven')
def test_thirty_one(self): self.assertEqual(int_to_english(31), 'thirty one')
def test_twelve(self): self.assertEqual(int_to_english(12), 'twelve')
def test_forty_one(self): self.assertEqual(int_to_english(41), 'forty one')
def test_one_hundred_eleven(self): self.assertEqual(int_to_english(111), 'one hundred eleven')