def test_SKIP(self):
        f = BytesIO()
        EliotFilter("SKIP", [b'{"a": 123}'], f).run()
        self.assertEqual(f.getvalue(), b"")
A result of C{SKIP} indicates nothing should be output.
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_filter.py/EliotFilterTests.test_SKIP