If you use [Redux DevTools Extension](https://github.com/zalmoxisus/redux-devtools-extension), [Remote Redux DevTools](https://github.com/zalmoxisus/remote-redux-devtools) or [RemoteDev](https://github.com/zalmoxisus/remotedev), it's already there, and no additional actions required.
With [`redux-devtools`](https://github.com/reduxjs/redux-devtools) and [`redux-devtools-inspector-monitor`](https://github.com/reduxjs/redux-devtools/packages/redux-devtools-inspector-monitor):
| `assertion` | String template or function with an object argument containing `action`, `prevState`, `curState` keys, which returns a string representing the assertion (see the [function](https://github.com/reduxjs/redux-devtools/blob/master/packages/redux-devtools-inspector-monitor-test-tab/src/redux/mocha/index.ts#L8-L9) or [template](https://github.com/reduxjs/redux-devtools/blob/master/packages/redux-devtools-inspector-monitor-test-tab/src/redux/mocha/template.ts#L5)). |
| [`wrap`] | Optional string template or function which gets `assertions` argument and returns a string (see the example [function](https://github.com/reduxjs/redux-devtools/blob/master/packages/redux-devtools-inspector-monitor-test-tab/src/redux/mocha/index.ts#L11-L13) or [template](https://github.com/reduxjs/redux-devtools/blob/master/packages/redux-devtools-inspector-monitor-test-tab/src/redux/mocha/template.ts#L7-L8)). |
| [`useCodemirror`] | Boolean. If specified will use codemirror styles. |
| [`theme`] | String. Name of [the codemirror theme](https://codemirror.net/demo/theme.html). |