how to write unit testcases for vue.js database testing and form testing in laravel using Jest

how to write unit testcases for vue.js database testing and form testing in laravel using Jest for below components it is very urgent for me because i have to test lot of code with jest but i am new to vuejs jest testing any solution or resources or examples specially related to database testing and form testing with mocking will be very helpful please....below components are from a crud app in laravel using vue.js

https://github.com/LaravelDaily/Laravel-Vue-First-CRUD/blob/master/resources/assets/js/components/companies/CompaniesCreate.vue

https://github.com/LaravelDaily/Laravel-Vue-First-CRUD/blob/master/resources/assets/js/components/companies/CompaniesEdit.vue

https://github.com/LaravelDaily/Laravel-Vue-First-CRUD/blob/master/resources/assets/js/components/companies/CompaniesIndex.vue