jest test or tests code example
Example 1: what is jest
Jest is a JavaScript testing framework maintained by Facebook, Inc. with a
focus on simplicity.
It works with projects using: Babel, TypeScript, Node.js, React, Angular and
Vue.js.
It aims to work out of the box and config free.
Example 2: jest
const sum = require('./sum');
test('adds 1 + 2 to equal 3', () => {
expect(sum(1, 2)).toBe(3);
});
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