Why there is no documentation on unit testing for Ext 5

Ext 4 had some documentation on how to do unit testing using Jasmine.

I am pretty sure that, Sencha team will be running thousands of test cases before pushing to finak package.

Can we expect to have some documentation on unit testing ?

Any one would like to share some pointers on unit testing ?

Thanks

Why there is no documentation on unit testing for Ext 5