Should JS Testing Framework

• In my previous post we have learnt about MochaJS framework.We will learn ShouldJS in this post.
• ShouldJS is a behavioral driven test framework.
• ShouldJS is an expressive framework and makes the test cases simple and keeps it cleaner.
• In this Demo,”We will learn to use MochaJS with ShouldJS for testing Asynchronous calls”.
• The ShouldJS can be installed using npm install should –save-dev command.The following screenshot shows ShouldJS installation.

• Mocha installation can be installed using npm install Mocha –save-dev command.The following screenshot shows the of MochaJS installation .

• For demonstration of ShouldJS we have created ShouldJSDemo directory.The following screenshot shows the structure of ShouldJSDemo directory.

• After installation the package.json has the entries for Mocha and Should.An entry to script property is added to run Mocha test framework.

{
  "name": "should-test-demo",
  "version": "1.0.0",
  "scripts": {
    "test": "mocha"
  },
  "devDependencies": {
    "mocha": "^2.3.2",
    "should": "^7.1.0"
  }
}

• The number-operation.js file contains the  code for adding two number and export the object contains the addTwoNumber() method.

var operation ={
    addTwoNumber : function(number1, number2){
        return number1 + number2;
    }
};
module.exports = operation;

• The test/test.js file contains  the code testing the addTwoNumber() method.It has used should.be.exactly() method to test addition of 2 numbers.

var assert = require("assert"),
    should = require("should")
    operation = require('../number-operation');

describe('Testing addTwoNumber', function() {
    it('should return 4 when the input number are 1 and 3', function () {
        operation.addTwoNumber(1,3).should.be.exactly(4);
    });
});

• Now we can run the test case using npm run test command.The following screenshot  shows the terminal with test case executed and passed.

• The demo code can be downloaded from the following link:-

https://github.com/saan1984/ShouldJSDemo