def test_equal_2(self): self.assertEqual(replace_all([1, 2, 2], 1, 2), [2, 2, 2])
def test_equal_5(self): self.assertEqual(replace_all('Hello World', 'o', '0'), 'Hell0 W0rld')
def test_equal_1(self): self.assertEqual(replace_all([], 1, 2), [])
def test_equal_4(self): self.assertEqual(replace_all([1, 2, 1, 2, 3], 1, 2), [2, 2, 2, 2, 3])