javascript - Test whether all reducers have been imported in the rootReducer -

i have rootreducer imports separate reducers so:

import { combinereducers } 'redux'; import departments './departments'; import indicators './indicators'; import versions './versions'; import projects './projects';  // combine reducers single reducer, state linked reducer via key used here const rootreducer = combinereducers({   versions,   departments,   indicators,   projects, });  export default rootreducer; 

since it's important reducer import everything, think makes sense test whether defined reducers in ./src/reducers imported. method can think of use fs check number of files in ./src/reducers (without index, or rootreducer) , check whether rootreducer contains many reducers.

seems ugly test, , bit fragile well. still nice notified failing test when forget include reducer. best way test whether reducers have been imported?

i hear you're coming don't think want dealing issue in tests. application grows you're want deeper reducer tree. e.g. projects reducer may come made of multiple sub-reducers , you'll have manage reducers need imported where. file system test become more , more brittle. in general, imports , file structures implementation details of project , want testing behavior of project.

but wanting immediate feedback on failing hook reducer totally makes sense. i'd try handle @ build level. assuming you're using webpack maybe see if this plugin can solve problem. detects unused exports. add plugins

new unusedfileswebpackplugin({ pattern: 'src/reducers/**' }) 

and build warn when have file isn't being imported. since works modules won't have worry directory structure (beyond ensuring pattern matches files want check).