## Description
Unit testing:
* [x] ext.wikilambda.app:
* [x] ext.wikilambda.app/mixins/api.js (with foreign api)
* [x] ext.wikilambda.app/store/stores/library.js (getDescription and lookupFunctions)
* [x] ext.wikilambda.app/store/stores/router.js (getWikilambdaConfig)
* [x] ext.wikilambda.app/store/stores/visualeditor.js
* [x] ext.wikilambda.app/components/visualeditor/FunctionCallSetup.vue
* [x] ext.wikilambda.app/components/visualeditor/FunctionSelect.vue
* [x ] ext.wikilambda.app/components/visualeditor/FunctionInputSetup.vue
* [x ] Remove ignore paths from jest.config.js
* [ ] ext.wikilambda.visualeditor
* [ ] Increase coverage threshold in jest.config.js
Integration testing:
* [ ] ext.wikilambda.visualeditor
Selenium testing:
* [ ] Visual Editor: add function call
* [ ] Visual Editor: edit function call
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## Completion checklist
* [ ] Before closing this task, review one by one the checklist available here: https://www.mediawiki.org/wiki/Abstract_Wikipedia_team/Definition_of_Done#Front-end_Task/Bug_Completion_Checklist