def METHOD_NAME(self):
    if libc_name is None:
        self.skipTest('could not find libc')
    if os.path.basename(libc_name) != 'libc.so.6':
        self.skipTest('wrong libc path for test')
    cdll.LoadLibrary("libc.so.6")
    # linux uses version, libc 9 should not exist
    self.assertRaises(OSError, cdll.LoadLibrary, "libc.so.9")
    self.assertRaises(OSError, cdll.LoadLibrary, self.unknowndll)