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Jest Testing

To Run test app.test.js in a single folder Example:

$ jest ../12-integer-to-roma/ --watch

Mocha Testing

Mocha runs in the root directory and find a folder called Test and run test files in there

//package.json

"scripts": {
    "mocha": "mocha"

If test files are in a desired folder add the directory after the cmd Mocha will look for any files that contains the name test (I.G. app.test.js, test.js) Or even in a directory called test/test.js

$ npm run mocha
# or
$ npm run mocha ./<Folder>/