def test_zero(self):
     self.assertEqual(square(0), 0)
 def test_two_three_four(self):
     self.assertEqual(square(2), 4)
     self.assertEqual(square(3), 9)
     self.assertEqual(square(4), 16)
 def test_negative(self):
     self.assertEqual(square(-1), 1)
 def test_one(self):
     self.assertEqual(square(1), 1)
 def test_zero(self):
     self.assertEqual(square(0), 0)
 def test_negative(self):
     self.assertEqual(square(-1), 1)
 def test_two_three_four(self):
     self.assertEqual(square(2), 4)
     self.assertEqual(square(3), 9)
     self.assertEqual(square(4), 16)
 def test_one(self):
     self.assertEqual(square(1), 1)