test_pep3151.py 文件源码

def test_errno_mapping(self):
        # The OSError constructor maps errnos to subclasses
        # A sample test for the basic functionality
        e = OSError(EEXIST, "Bad file descriptor")
        self.assertIs(type(e), FileExistsError)
        # Exhaustive testing
        for errcode, exc in self._map.items():
            e = OSError(errcode, "Some message")
            self.assertIs(type(e), exc)
        othercodes = set(errno.errorcode) - set(self._map)
        for errcode in othercodes:
            e = OSError(errcode, "Some message")
            self.assertIs(type(e), OSError)