import my_math

def test_add(): # konwencja nazwa test_nazwafunkcji

assert my_math.add(7, 3) == 10

assert my_math.add(7, -1) == 6

assert my_math.add(4.3, 5.3) == 9.6

def test_product():

assert my_math.product(7, 3) == 21

assert my_math.product(7, -1) == -7

assert my_math.product(4.3, 5.3) == 22.79

def test_reversal():

assert my_math.invert_string("tak") == "kat"

def test_sq():

assert my_math.sq(5) == 25

assert my_math.sq(-3) == 9

assert my_math.sq(0) == 0

def test_palindrom():

assert my_math.palindrom("ala") == True

assert my_math.palindrom("as") != True

assert not my_math.palindrom("as")

# test_add()

# test_product()

# test_reversal()

# test_palindrom()