def test_negative(self):
     self.assertEqual(cube(-1), -1)
 def test_one(self):
     self.assertEqual(cube(1), 1)
 def test_two_three_four(self):
     self.assertEqual(cube(2), 8)
     self.assertEqual(cube(3), 27)
     self.assertEqual(cube(4), 64)
 def test_zero(self):
     self.assertEqual(cube(0), 0)
 def test_negative(self):
     self.assertEqual(cube(-1), -1)
 def test_two_three_four(self):
     self.assertEqual(cube(2), 8)
     self.assertEqual(cube(3), 27)
     self.assertEqual(cube(4), 64)
 def test_one(self):
     self.assertEqual(cube(1), 1)
 def test_zero(self):
     self.assertEqual(cube(0), 0)