def test_between_zero_and_one(self):
     self.assertEqual(to_rational(0.125), '1/8')
 def test_larger_than_one(self):
     self.assertEqual(to_rational(3.25), '13/4')
 def test_smaller_than_minus_one(self):
     self.assertEqual(to_rational(-8.9), '-89/10')
 def test_between_zero_and_minus_one(self):
     self.assertEqual(to_rational(-0.125), '-1/8')