def test_negetiveValues():
assert tax(-99) == 0
def test_tax1():
assert tax(1) == 0.15
def test_tax6():
assert tax(250000) == 61796.57
def test_tax5():
assert tax(150000) == 31211.57
def test_tax4():
assert tax(100000) == 18140.66
def test_tax3():
assert tax(50000) == 7630.85
def test_tax2():
assert tax(2) == 0.3