Run Jest test and collect coverage from all files in a specific directory

Question

I am using the following code to run Jest test on specific file.

   jest utils.spec.js --collectCoverageFrom=**/utils.js

If i want to test whole directory i use

jest someDirectory --collectCoverageFrom=**/someDirectory

But the code coverage does not work here why is so?

Thanks.

Totten

Answer 1

You need to add this pattern /**/*.js, that match all the files in all sub directories:

jest someDirectory --collectCoverageFrom=**/someDirectory/**/*.js

Spendable

Although tests executed for specified directory the coverage is performed on all the available tests. – Totten