def test_rotations():
assert list(rotations('ab')) == [['a', 'b'], ['b', 'a']]
assert list(rotations(range(3))) == [[0, 1, 2], [1, 2, 0], [2, 0, 1]]
assert list(rotations(range(3), dir=-1)) == [[0, 1, 2], [2, 0, 1], [1, 2, 0]]
def test_rotations():
assert list(rotations('ab')) == [['a', 'b'], ['b', 'a']]
assert list(rotations(range(3))) == [[0, 1, 2], [1, 2, 0], [2, 0, 1]]
assert list(rotations(range(3), dir=-1)) == [[0, 1, 2], [2, 0, 1],
[1, 2, 0]]
def test_rotations():
assert list(rotations("ab")) == [["a", "b"], ["b", "a"]]
assert list(rotations(range(3))) == [[0, 1, 2], [1, 2, 0], [2, 0, 1]]
assert list(rotations(range(3), dir=-1)) == [[0, 1, 2], [2, 0, 1], [1, 2, 0]]