def test_CHECKERBOARD_pattern_with_single_twists():
cube = Cube()
for turn in CHECKERBOARD_TURNS:
cube.twist(turn)
assert cube.cube_string == CHECKERBOARD
def test_cube_is_solved_after_reset():
cube = Cube()
cube.scramble()
cube.twist(2)
cube.twist_by_notation("U2 B D'")
cube.reset()
assert cube.is_solved
