add signature tests for new function duck-typing in Py3.4
add signature tests for new function duck-typing in Py3.4

--HG--
extra : amend_source : 1bdb5f011d5234a8631b04ac0e5f9df9fe6a4de0
extra : transplant_source : %A1Z%B1%2C%CE%B4%D6%20SMS%CA%12%7D%2B%1A%FC%00%E1%CD

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