Test coverage when using enhancer?

[raed667]

How would one go about testing adding this enhancer with jest?

I have this example (link)

something like this:

if (process.env.NODE_ENV === 'development') {
const devToolsExtension = window['__REDUX_DEVTOOLS_EXTENSION__'];
if (typeof devToolsExtension === 'function') { // this line
  enhancers.push(devToolsExtension()); // and this line 
}
}

[zalmoxisus]

You can include redux-devtools-extension npm package instead, so there will be no need to test the globals. The test should just check if devToolsEnhancer returns a noop function. Or in case of composeWithDevTools it returns the same function as require('redux').compose.

If you want, you can test the enhancer itself like here.

[raed667]

If we just need to check that the store exists, I think this should be enough?

https://github.com/RaedsLab/showcase-react/blob/master/src/redux/store.test.js
https://github.com/RaedsLab/showcase-react/blob/master/src/redux/store.js

[zalmoxisus]

Yes, just there will be not much difference in development. You could also try to add our instrumentation enhancer (maybe we could also export the other parts) and check if dispatch and getState doesn't break anything, but I guess for most of cases that's not necessary.