def test_negative_exponent_returns_float(self):
self.check_exponent_value(exponent.exponent, 2, range(-1, 5, -1))
self.assertIsInstance(exponent.exponent(2, -1), float)
def test_exponent_returns_right_answer(self):
for base in range(1, 5):
self.check_exponent_value(exponent.exponent, base, range(8))
self.assertEqual(1, exponent.exponent(2, 0))
self.assertEqual(1, exponent.exponent(0, 0))
def test_exponent_negative_base_returns_right_answer(self):
self.check_exponent_value(exponent.exponent, -2, range(8))
self.assertEqual(16, exponent.exponent(-4, 2))
