Mocha and chai example

runt_test.sh

#!/usr/bin/env bash
# make soure you have mocha installed
npm i mocha -g

# run tests with mocha

mocha --reporter=spec test.spec.js

test.spec.js

var chai = require('chai');

var expect = chai.expect;
var assert = chai.assert;

var testObj = {
  name: "test",
  sub: {
    name: 'test sub'
  },
  numbers: [1, 2, 3, 4],
  hasNumbers : true
};

describe ('Test Suite', function () {
  describe('expect tests', function () {
    it ('should be a valid testObject', function () {
      expect(testObj).to.be.an('object').and.is.ok;
      expect(testObj).to.have.property('sub').that.is.an('object').and.is.ok;
      expect(testObj.sub).to.have.property('name').that.is.a('string').and.to.equal('test sub');
      expect(testObj).to.have.property('numbers').that.deep.equals([1, 2, 3, 4]);
      expect(testObj).to.have.property('hasNumbers', true);
    });

  });

  describe('assert tests', function () {
    it ('should be a valid testObject', function () {
      assert.isOk(testObj);
      assert.isObject(testObj);
      assert.propertyVal(testObj, 'name', 'test');
      assert.property(testObj, 'sub');
      assert.propertyVal(testObj.sub, 'name', 'test sub');
      assert.deepEqual(testObj.numbers, [1, 2, 3, 4]);
      assert.typeOf(testObj.hasNumbers, 'boolean');
      assert.isTrue(testObj.hasNumbers);
    });
  });

});

Thank you ! i was searching for some query about property and propertyVal , this one helped me. One question though, why do you check property 'sub' on 'testobj' on line 32 and 34 again.

@ YagneshP this is a bit of old code, but there is no reason to check again, this is an accidental leftover I guess :-)
Update, thank you for noticing.

@mrister how would you handle the imports if you had multiple test suites that all required to import chai? e.g. so we don't repeat requires in each file?

var chai = require('chai');
var expect = chai.expect;
var assert = chai.assert;

@lonely-caat, That depends on your setup and test runner however you could try as described here and register them as globals chaijs/chai#1140 (comment)
A quite common approach if you are using mocha is to set up a mocha.opt or .mocharc config file and in it require a module where you import chai (and any other helpers you would like) and then those are globally available for usage in test files
https://github.com/mochajs/mocha/blob/master/example/config/.mocharc.js#L34

@mrister, while globals might be confusing for someone who's coming to the project to figure out where those variables are coming from, a config file sounds cool, thank you!

@lonely-cat. Yes that might be true, bit a little bit of documentation in project/s readme goes long way ;-). Glad to help!