def test_popMultiple(self):
        ctx = _ExecutionContext()
        a = object()
        b = object()
        ctx.push(a)
        ctx.push(b)
        ctx.pop()
        self.assertIs(ctx.current(), a)
L{_ExecutionContext.pop} cancels the last L{_ExecutionContext.push},
dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_action.py/ExecutionContextTests.test_popMultiple