def test_array():
v1 = [1, 2, 3]
v2 = [2, 3, 4]
for i in range(0, len(v1)):
v1x = v1[i]
v2x = v2[i]
assert code_holder(v1x, v2x) == v1x + v2x
def test_second():
assert code_holder(0, 0) == 0
def test_answer():
assert code_holder(1, 3) == 3
def test_negatives():
assert code_holder(-12, -19) == -12 + -19
def test_third():
assert code_holder(15, 39) == 15 + 39
