"""
Testing the QuAdder
"""
import os
import sys
# Add the parent directory to the system path
DIR_PATH = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.join(DIR_PATH, '..'))
import numpy as np
import itertools
from ariths_gen.wire_components import Bus
from ariths_gen.multi_bit_circuits.approximate_adders import QuAdder


def test_quadder():
    c = QuAdder(Bus("a", 8), Bus("b", 8), R=[4, 2, 2], P=[0, 2, 2], prefix="quad")
    c.get_v_code_hier(file_object=sys.stdout)

    x = np.arange(0, 256).reshape(-1, 1)
    y = np.arange(0, 256).reshape(1, -1)

    r = c(x, y)
    r2 = x + y

    assert np.abs(r - r2).max() == 64
    np.testing.assert_equal(np.abs(r - r2).mean(), 7.5)


if __name__ == "__main__":
    test_quadder()
    print("Quadder Python tests were successful!")