I would like to get rid of global variables in my Jest test code. Specifically describe
, it
and expect
:
describe('Welcome (Snapshot)', () => { it('Welcome renders hello world', () => { ... }); });
So I tried to add:
import {describe,it} from 'jest';
and
import jest from 'jest'; jest.describe( ... jest.it( ...
And other variations...
But no luck.
How should I get it working?
To mock an imported function with Jest we use the jest. mock() function. jest. mock() is called with one required argument - the import path of the module we're mocking.
In order to run a specific test, you'll need to use the jest command. npm test will not work. To access jest directly on the command line, install it via npm i -g jest-cli or yarn global add jest-cli . Then simply run your specific test with jest bar.
How to check if jest is installed. In addition to that npm is creating a shortcut in you local node_modules under the directory . bin son in there you should find a link to jest.
The simplest solution for this is adding jest: true
to your env
configuration in ESLint, like so:
"env": { "browser": true, "node": true, "jasmine": true, "jest": true, "es6": true },
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