test_ffi_backend.py 文件源码

def test_callback_onerror(self):
        ffi = FFI(backend=self.Backend())
        seen = []
        def oops(*args):
            seen.append(args)
        def otherfunc():
            raise LookupError
        def cb(n):
            otherfunc()
        a = ffi.callback("int(*)(int)", cb, error=42, onerror=oops)
        res = a(234)
        assert res == 42
        assert len(seen) == 1
        exc, val, tb = seen[0]
        assert exc is LookupError
        assert isinstance(val, LookupError)
        assert tb.tb_frame.f_code.co_name == 'cb'
        assert tb.tb_frame.f_locals['n'] == 234