npm:klassi-js | Skypack (2024)

klassi-Js is a debuggable BDD Javascript test automation framework. Built on webdriver.io (Next-gen browser and mobile automation test framework for Node.js) and cucumber-js with integrated Visual, accessibility and API Testing, your test can run locally or in the cloud using Lambdatest, BrowserStack or Sauce Labs

Installation

yarn add klassi-jsnpm install klassi-js

Usage

node ./node_modules/klassi-js/index.js # path to the module within your project

Options

--help output usage information--version output the version number--browser <name> name of browser to use (chrome, firefox). defaults to chrome--tags <@tagName> name of cucumber tags to run - Multiple TAGS usage--steps <path> path to step definitions. defaults to ./step-definitions--featureFiles <path> path to feature definitions. defaults to ./features--pageObjects <path> path to page objects. defaults to ./page-objects--sharedObjects <paths> path to shared objects - repeatable. defaults to ./shared-objects--reports <path> output path to save reports. defaults to ./reports--disableReport disables the test report from opening after test completion--email sends email reports to stakeholders--env <path> name of environment to run the framework/test in. default to dev--reportName <optional> name of what the report would be called i.e. 'Automated Test'--remoteService <optional> which remote driver service, if any, should be used e.g. browserstack--extraSettings <optional> further piped configs split with pipes--updateBaselineImages automatically update the baseline image after a failed comparison or new images--wdProtocol the switch to change the browser option from using devtools to webdriver--closeBrowser <optional> this closes the browser after each scenario, defaults to always, use 'no' if you want to want to keep the browser open

Directory Structure

To help with usage of the built in functionality, we have added a .envConfigrc.js file at the base of the project. You can check out the template here

.└── features └── search.feature└── page-objects └── search.js└── shared-objects └── searchData.js└── step_definitions └── search-steps.js└── reports # folder and content gets created automatically on test run └── chrome ├── reportName-01-01-1900-235959.html └── reportName-01-01-1900-235959.json.envConfigrc.js # this file will contain all your environment variables #projectName, emailAddresses, environments, browserstack/lambdatest config

Step definitions

The following variables are available within the Given(), When() and Then() functions:

Variable	Description
`browser`	an instance of webdriverio (the browser)
`wdio`	the raw webdriverio module, providing access to static properties/methods
`pageObjects`	collection of page objects loaded from disk and keyed by filename
`sharedObjects`	collection of shared objects loaded from disk and keyed by filename
`helpers`	a collection of helper methods things webdriver.io does not provide but really should!
`expect`	instance of chai expect to `expect('something').to.equal('something')`
`assert`	instance of chai assert to `assert.isOk('everything', 'everything is ok')`
`trace`	handy trace method to log console output with increased visibility
`got`	exposes the GOT subroutine for API testing

Helpers

Klassi-js contains a few helper methods to help along the way, these methods are:

// Load a URL, returning only when the <body> tag is presentawait helpers.loadPage('https://duckduckgo.com', 10);// take image for comparissonawait helpers.takeImage('flower_1-0.png', 'div.badge-link--serp.ddg-extension-hide.js-badge-link');// compare taken image with baseline imageawait helpers.compareImage('flower_1-0.png');// get the content of an endpointawait helpers.apiCall('http://httpbin.org/', 'get');// writing content to a text fileawait helpers.writeToTxtFile(filepath, output);// reading content froma text fileawait helpers.readFromFile(filepath);// applying the current date to filesawait helpers.currentDate();// get current date and time (dd-mm-yyyy-00:00:00)await helpers.getCurrentDateTime()// clicks an element (or multiple if present) that is not visible, useful in situations where a menu needs a hover before a child link appearsawait helpers.clickHiddenElement(selector, textToMatch)// This method is useful for dropdown boxes as some of them have default 'Please select' option on index 0await helpers.getRandomIntegerExcludeFirst(range)// Get the href link from an elementawait helpers.getLink(selector)//wait until and element is visible and click itawait helpers.waitAndClick(selector)// wait until element to be in focus and set the valueawait helpers.waitAndSetValue(selector, value)// function to get element from frame or framesetawait helpers.getElementFromFrame(frameName, selector)// This will assert 'equal' text being returnedawait helpers.assertText(selector, expected)// This will assert text being returned includesawait helpers.expectToIncludeText(selector, expectedText)// this asserts that the returned url is the correct oneawait helpers.assertUrl(expected)

Browser usage

By default, the test run using Google Chrome/devtools protocol, to run tests using another browser locally you'll need a local selenium server running, supply the browser name along with the --wdProtocol --browser switch

Browser	Example
Chrome	`--wdProtocol --browser chrome`
Firefox	`--wdProtocol --browser firefox`

All other browser configurations are available via 3rd party services (i.e. browserstack | lambdatest)

Visual Regression with Resemble JS

Visual regression testing, the ability to compare a whole page screenshots or of specific parts of the application / page under test.If there is dynamic content (i.e. a clock), hide this element by passing the selector (or an array of selectors) to the takeImage function.

// usage within page-object file: await helpers.takeImage(fileName, [elementsToHide, elementsToHide]); await helpers.compareImage(fileName);

API Testing with got

Getting data from a JSON REST API

 function apiCall(url, method, auth, body, fileName, fileData, statusCode) { let endPoint = ('http://endpoint.com'); let options = { url: endPoint, method: 'GET' || 'PUT' || 'POST' || 'DELETE', headers: { Authorization: auth, 'Content-Type': 'application/json', }, body, time: true, resolveWithFullResponse: true, }; return gotApi(options) if ('GET') { return res; } if ('DELETE' && fileName != null || 'PUT' && fileName != null) { return fs.readFileSync(fileName, 'utf8'); } if ('POST' && fileName != null) { return res.json().then(async function (res) { const data = await res.id; await fs.writeFileSync(fileName, data); }); } }

Accessibility Testing with Axe

Automated accessibility testing feature has been introduced using the Axe-Core OpenSource library.

Sample code

All the accessibility fuctions can be accessed through the global variable accessibilityLib.| function | Description ||----------------------------|-----------------------------------------------------------------|| accessibilityLib.getAccessibilityReport('PageName')| generates the accessibility report with the given page name || accessibilityLib.getAccessibilityError() | returns the total number of error count for a particular page. || accessibilityLib.getAccessibilityTotalError() | returns the total number of error count for all the pages in a particilar execution |

// usage within page-object file:When('I run the accesibility analysis for {string}', async function (PageName) { // After navigating to a particular page, just call the function to generate the accessibility report await accessibilityLib.getAccessibilityReport(PageName);});Then('there should not be any violation in the accessibility report', function () {// This will return the total accessibility error count for a particular page.let violationcount=accessibilityLib.getAccessibilityError();assert.equal(violationcount, 0);});

Test Execution Reports

HTML and JSON reports will be automatically generated and stored in the default ./reports folder. This location can bechanged by providing a new path using the --reports command line switch:

Accessibility Report

HTML and JSON reports will be automatically generated and stored in the default ./reports/accessibility folder.This location can be changed by providing a new path using the --reports command line switch:

Event handlers

You can register event handlers for the following events within the cucumber lifecycle.

const {After, Before, AfterAll, BeforeAll, BeforeStep, AfterStep} = require('@cucumber/cucumber');

Event	Example
Before	`Before(function() { // This hook will be executed before all scenarios})`
After	`After(function() {// This hook will be executed after all scenarios});`
BeforeAll	`BeforeAll(function() {// perform some shared setup});`
AfterAll	`AfterAll(function() {// perform some shared teardown});`
BeforeStep	`BeforeStep(function() {// This hook will be executed before all steps in a scenario with tagname;`
AfterStep	`AfterStep(function() {// This hook will be executed after all steps, and take a screenshot on step failure;`

How to debug

Most webdriverio methods return a JavaScript Promise that is resolved when the method completes. The easiest way to step in with a debugger is to add a .then method to the function and place a debugger statement within it, for example:

 When(/^I search DuckDuckGo for "([^"]*)"$/, function (searchQuery, done) { elem = browser.$('#search_form_input_homepage').then(function(input) { expect(input).to.exist; debugger; // <<- your IDE should step in at this point, with the browser open return input; }) done(); // <<- let cucumber know you're done });

Demo

To demo the framework without installing it into your project use the following commands:

 # download this example code git clone https://github.com/larryg01/klassi-js.git # browser to the new directory cd klassi-js # run the search feature yarn install node index.js --tags @search

Bugs

Please raise bugs via the klassi-js issue tracker, please provide enough information for bug reproduction.

Contributing

Anyone can contribute to this project, PRs are welcome. In lieu of a formal styleguide, please take care to maintain the existing coding style.

Credits

John Doherty