def analyze_bit(key: List[Key], side_length: int, random_bits: str,
message_bits: str):
"""Given input and key, count how the number of bits changes afterward.
:param message_bits: Bits for the actual message.
:param random_bits: Bits for the randomness.
:param key: The desired key to use.
:param side_length: Desired length of the Rubik's Cube.
:return: Number of zeros and number of ones in the encrypted result.
"""
# Concatenate the input to get cube input.
cube_input = message_bits + random_bits
# Initialize the cube.
cube = Cube(cube_input=cube_input, cube_side_length=side_length)
# Xor, Shift, and apply move onto the cube.
for each_key in key:
cube.xor()
cube.shift_cubie_content()
cube.shift(key=each_key)
# Count number of zeros and number of ones.
return {"0": cube.content.count("0"), "1": cube.content.count("1")}
def test_xor(self):
# Set the cube to be half 1 and half 0.
cube = Cube(cube_input="0" * 180 + "1" * 36, cube_side_length=3)
# Xor the cube and test result.
cube.xor()
assert cube.content == "1" * 216