Mocha quick start

1.Install nodejs latest version(v8.7)

2.Install mocha

3.Create app js and test js files.

//calc.js to be tested by mocha

module.exports = function (...rest) {

var sum = 0;

for (let n of rest) {

sum += n;

}

return sum;

};

//calc-test.js

const assert = require('assert');

const sum = require('./calc');

describe('#calc.js', () => {

describe('#sum()', () => {

it('sum() should return 0', () => {

assert.strictEqual(sum(), 0);

});

it('sum(1) should return 1', () => {

assert.strictEqual(sum(1), 1);

});

it('sum(1, 2) should return 3', () => {

assert.strictEqual(sum(1, 2), 3);

});

it('sum(1, 2, 3) should return 6', () => {

assert.strictEqual(sum(1, 2, 3), 6);

});

});

});

4.Run the test.