def test_func2(): assert conversion_func(5) == "V"
def test_func3(): assert conversion_func(310) == "CCCX"
def test_func9(): assert conversion_func(46) == "XLVI"
def test_func1(): assert conversion_func(4) == "IV"
def test_func8(): assert conversion_func(270) == "CCLXX"
def test_func7(): assert conversion_func(1998) == "MCMXCVIII"
def test_func6(): assert conversion_func(137) == "CXXXVII"
def test_func5(): assert conversion_func(500) == "D"
def test_func4(): assert conversion_func(17) == "XVII"