Jest Example

README

# Jest Example

This is directly from the jest website.

## Requirements

- node
- npm

## Install

```bash
git clone https://gist.github.com/236b5201251fea96b640.git
cd 236b5201251fea96b640
npm install
mkdir __tests__
mv sum-test.js __tests__/
```

## Run

```bash
npm test
```

package.json

{
   "scripts" : {
      "test" : "jest"
   },
   "devDependencies": {
    "jest-cli": "0.4.0"
   }
}

sum-test.js

jest.dontMock('../sum');

describe('sum', function() {
     it('adds 1 + 2 to equal 3', function() {
            var sum = require('../sum');
               expect(sum(1, 2)).toBe(3);
                });
});

sum.js

function sum(value1, value2) {
      return value1 + value2;
}
module.exports = sum;