Possible tests examples:
# Do not forget to import the find_rectangle_perimeter function.
from addition import find_rectangle_perimeter
def test_find_rectangle_perimeter():
""" Tests if the function can handle two positive integer values as input.
"""
assert find_rectangle_perimeter(4, 5) == 18
def test_find_rectangle_perimeter_zero_width():
""" Tests if the function can handle width set to 0.
"""
assert find_rectangle_perimeter(0, 3) == 6