Add integration test cases

[seeflood]

What would you like to be added:
Add integration test cases for a certain type of API. Choose one type of API (such as state API, pubsub API) to add integration test cases for it.
Currently only the wasm module has integrated test cases, you can refer to the wasm configuration in the Makefile.
In theory, there is no need to develop additional code. We can just run the demo program in the Makefile

chinese:
为某类API添加集成测试用例。任选一类API(比如state API,pubsub API）为它添加集成测试用例。
目前只有wasm模块有集成测试用例，可以参考Makefile里wasm的配置。理论上不需要开发额外代码、在Makefile里运行demo程序就行

Why is this needed:
We need integration tests!