JEST

or:

yarn add jest babel-jest --dev

in package Json : "test": "jest --watch"

yarn start

mkdir tests touch count.test.js

the countWord.js file need to move to root folder

yarn add enzyme react-test-renderer enzyme-adapter-react-16 --dev

yarn test

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
__tests__		__tests__
src		src
.babelrc		.babelrc
.gitignore		.gitignore
hello.js		hello.js
index.html		index.html
package.json		package.json
readme.md		readme.md
webpack.config.js		webpack.config.js
yarn.lock		yarn.lock

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