backend_tests.py 文件源码

def test_enum_in_struct(self):
        ffi = FFI(backend=self.Backend())
        ffi.cdef("enum foo { A, B, C, D }; struct bar { enum foo e; };")
        s = ffi.new("struct bar *")
        s.e = 0
        assert s.e == 0
        s.e = 3
        assert s.e == 3
        assert s[0].e == 3
        s[0].e = 2
        assert s.e == 2
        assert s[0].e == 2
        s.e = ffi.cast("enum foo", -1)
        assert s.e == 4294967295
        assert s[0].e == 4294967295
        s.e = s.e
        py.test.raises(TypeError, "s.e = 'B'")
        py.test.raises(TypeError, "s.e = '2'")
        py.test.raises(TypeError, "s.e = '#2'")
        py.test.raises(TypeError, "s.e = '#7'")