def test_format_usd(): assert format_usd(9.5) == "$9.50"
def test_format_usd(): #assert 2 == 4 #assert 2 == 2 assert format_usd(9.5) == "$9.50"
def test_format_usd(): #result = format_usd(1999.99) assert format_usd(1999.99) == "$1,999.99"