def test_pushMultiple(self):
        ctx = _ExecutionContext()
        a = object()
        b = object()
        ctx.push(a)
        ctx.push(b)
        self.assertIs(ctx.current(), b)
L{_ExecutionContext.current} returns the action passed to the last
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_action.py/ExecutionContextTests.test_pushMultiple