def test_call_descr_extra_info():
FUNC = ootype.StaticMethod([], ootype.Signed)
ARGS = ()
descr1 = CliCPU.calldescrof(FUNC, ARGS, ootype.Signed, "hello")
extrainfo = descr1.get_extra_info()
assert extrainfo == "hello"
descr2 = CliCPU.calldescrof(FUNC, ARGS, ootype.Signed, "hello")
assert descr2 is descr1
descr3 = CliCPU.calldescrof(FUNC, ARGS, ootype.Signed)
assert descr3 is not descr1
assert descr3.get_extra_info() is None
