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"""Bitwise operators

@see: https://www.w3schools.com/python/python_operators.asp

Bitwise operators manipulate numbers on bit level.

"""

def test_bitwise_operators():

"""Bitwise operators"""

# AND

# Sets each bit to 1 if both bits are 1.

#

# Example:

# 5 = 0b0101

# 3 = 0b0011

assert 5 & 3 == 1 # 0b0001

# OR

# Sets each bit to 1 if one of two bits is 1.

#

# Example:

# 5 = 0b0101

# 3 = 0b0011

assert 5 | 3 == 7 # 0b0111

# NOT

# Inverts all the bits.

assert ~5 == -6

# XOR

# Sets each bit to 1 if only one of two bits is 1.

#

# Example:

# 5 = 0b0101

# 3 = 0b0011

number = 5 # 0b0101

number ^= 3 # 0b0011

assert 5 ^ 3 == 6 # 0b0110

# Signed right shift

# Shift right by pushing copies of the leftmost bit in from the left, and let the rightmost

# bits fall off.

#

# Example:

# 5 = 0b0101

assert 5 >> 1 == 2 # 0b0010

assert 5 >> 2 == 1 # 0b0001

# Zero fill left shift

# Shift left by pushing zeros in from the right and let the leftmost bits fall off.

#

# Example:

# 5 = 0b0101

assert 5 << 1 == 10 # 0b1010

assert 5 << 2 == 20 # 0b10100