Mocha Example

testeq.js

'use strict';
var assert = require('assert');

var EqModule = function () {};
EqModule.prototype.solve = function (a) {
  var val = 0;

  a.forEach(function (n) {
    val += n;
  });

  return val;
};

var eqModule = new EqModule();

// Defining a suite of tests
describe('EQ Module', function () {
  it('should be a function', function () {
    assert.equal(typeof EqModule, 'function'); // should returns true
  });

  it('should be an instance of EqModule', function () {
    assert.equal(eqModule instanceof EqModule, true); // should returns true
  });

  it('should return the correct value', function () {
    var val = eqModule.solve([1,2,3]);
    assert.equal(val, 6); // should returns 6
  });
});