#Mocha Mocha is a testing library for Node.js, created to be a simple, extensible, and fast testing suite, making asynchronous testing simple and fun. Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases.
This repo shows its usage by implementing a color converter that can translate from RGB (red, green, blue) to hexadecimal color representation. As well as creating a web server that exposes the above converter, and demonstrates how to test asynchronous code.
Mocha Repository: https://github.com/mochajs/mocha Source: https://semaphoreci.com/community/tutorials/getting-started-with-node-js-and-mocha ##Installation Install with npm:
$ npm install mocha
##Usage We will update the test command in package.json to contain the following command.
{
"scripts": {
"test": "mocha test/mocha.js"
}
}In order to run the tests simply execute
$npm test
##Syntaxis ###describe Describe the features that we are implementing by giving us a describe function that encapsulates our expectations.
describe("Feature", function() {
});###it The it function is very similar to the describe function, except that we can only put expectations in the body of the it function.
describe("Feature", function() {
it("Expectation", function() {
});
});#####done For every it that needs to wait for a response value, inject a done callback function and call it only when the expectations were executed.
var expect = require('chai').expect;
var request = require('request');
//...
describe("Feature", function() {
it("Expectation", function() {
request(url, function(error, response, body) {
//Expectation
done();
});
});
});
//...