def test_first_bracket():
assert tax(1.00) == 0.15
assert tax(2.00) == 0.30
def test_tax(income, taxes):
assert cantax.tax(income) == taxes
def test_negative_value():
assert tax(-100) == 0
def test_fifth_bracket():
assert tax(250000) == 61796.57
def test_fourth_bracket():
assert tax(150000) == 31211.57
def test_third_bracket():
assert tax(100000) == 18140.66
def test_second_bracket():
assert tax(50000) == 7630.85