Chai-Mugshot

Chai plugin for the Mugshot Visual regression testing lib.

Install

npm install --save-dev chai-mugshot

Usage

var chai = require('chai');
var expect = require('chai').expect;
var chaiMugshot = require('chai-mugshot');
var Mugshot = require('mugshot');
var WebdriverIOAdapter = Mugshot.adapters.WebdriverIO;
var webdriverio = require('webdriverio');
 
describe('Suite', function() {
  var webdriverioInstance;
 
  before(function(done) {
    var options = {
      desiredCapabilities: {
        browserName: 'firefox'
      }
    };
 
    webdriverioInstance = webdriverio.remote(options).init()
      .url('http://example.com')
      .then(function() {
      
        var browser = new WebdriverIOAdapter(webdriverioInstance);
        var mugshot = new Mugshot(browser);
        
        chai.use(chaiMugshot(mugshot));
        
        done();
      });
  });
 
  it('should always look the same', function() {
    var captureItem = {
      name: 'myComponent',
      selector: '#myComponent'
    };
    
    return expect(captureItem).to.be.identical;
  });
  
  it('should always differ', function() {
  // see https://github.com/uberVU/mugshot#methods for details
    var captureItem = {
      name: 'component',
      selector: '#component'
    };
    
    return expect(captureItem).to.not.be.identical;
  });
 
  after(function() {
    return webdriverio.end();
  });
});

API

For the plugin to function, you must pass a Mugshot instance as in the example provided above.

Properties

The assertion properties return a promise that tells Mocha or other test runners, that the test is async.

• identical - asserts that the baseline on disk of the capturItem is identical to the current screenshot