The jest object is automatically in scope within every test file. The methods
in the jest object help create mocks and let you control Jest's overall
behavior. It is therefore completely unnecessary to import in jest, as Jest
doesn't export anything in the first place.
This rule reports on any importing of Jest.
To name a few: var jest = require('jest'); const jest = require('jest');
import jest from 'jest'; import {jest as test} from 'jest';
There is no correct usage of this code, other than to not import jest in the
first place.