codeceptjs

What is codeceptjs?

CodeceptJS is an end-to-end testing framework for Node.js that simplifies the process of writing and running tests for web applications. It supports various testing engines like WebDriver, Puppeteer, TestCafe, and more, allowing for flexible and powerful test automation.

What are codeceptjs's main functionalities?

End-to-End Testing

CodeceptJS allows you to write end-to-end tests in a simple and readable format. This example demonstrates a basic login test where the user navigates to the login page, fills in the username and password, clicks the login button, and verifies that the welcome message is displayed.

const { I } = inject();

Feature('Login');

Scenario('test login', (I) => {
  I.amOnPage('/login');
  I.fillField('Username', 'user');
  I.fillField('Password', 'password');
  I.click('Login');
  I.see('Welcome, user');
});

Page Object Model

CodeceptJS supports the Page Object Model (POM) design pattern, which helps in organizing and maintaining test code. This example shows a LoginPage class that encapsulates the elements and actions related to the login page, making the test code more modular and reusable.

class LoginPage {
  constructor() {
    this.fields = {
      username: 'input[name="username"]',
      password: 'input[name="password"]'
    };
    this.buttons = {
      login: 'button[type="submit"]'
    };
  }

  login(username, password) {
    I.fillField(this.fields.username, username);
    I.fillField(this.fields.password, password);
    I.click(this.buttons.login);
  }
}

module.exports = new LoginPage();

Data-Driven Testing

CodeceptJS supports data-driven testing, allowing you to run the same test with different sets of data. This example demonstrates how to create a data table with multiple user credentials and run the login test for each set of credentials.

const { I } = inject();

Feature('Login');

const users = new DataTable(['username', 'password']);
users.add(['user1', 'password1']);
users.add(['user2', 'password2']);

Data(users).Scenario('test login with multiple users', (I, current) => {
  I.amOnPage('/login');
  I.fillField('Username', current.username);
  I.fillField('Password', current.password);
  I.click('Login');
  I.see('Welcome, ' + current.username);
});

Other packages similar to codeceptjs

cypress

Cypress is a popular end-to-end testing framework that provides a fast, reliable, and easy-to-use testing experience. It offers features like time travel, real-time reloads, and automatic waiting. Compared to CodeceptJS, Cypress has a more modern and user-friendly interface but is limited to running tests in a browser environment.

nightwatch

Nightwatch.js is an end-to-end testing framework that uses the W3C WebDriver API to perform browser automation. It is known for its simplicity and ease of setup. Compared to CodeceptJS, Nightwatch.js is more focused on WebDriver-based testing and may require more configuration for advanced use cases.

webdriverio

WebdriverIO is a versatile testing framework that supports both WebDriver and DevTools protocols. It offers a wide range of plugins and integrations, making it highly customizable. Compared to CodeceptJS, WebdriverIO provides more flexibility and control over the testing process but may have a steeper learning curve.

README

CodeceptJS

Reference: Helpers API | Demo

Modern Era Acceptance Testing Framework for NodeJS

CodeceptJS is a new testing framework for end-to-end testing with WebDriver (or others). It abstracts browser interaction to simple steps which is written from a user perspective. A simple test that verifies that "Welcome" text is present on a main page of a site will look like:

Feature('CodeceptJS demo');

Scenario('check Welcome page on site', (I) => {
  I.amOnPage('/');
  I.see('Welcome');
});

CodeceptJS tests are:

• Synchronous. You don't need to care about callbacks, or promises, test scenarios are linear, your test should be too.
• Written from user's perspective. Every action is a method of I. That makes test easy to read, write and maintain even for non-tech persons.
• Backend API agnostic. We don't know which WebDriver implementation is running this test. We can easily switch from WebDriverIO to Protractor or PhantomJS.

CodeceptJS uses Helper modules to provide actions to I object. Currently CodeceptJS has these helpers:

• Puppeteer - uses Google Chrome's Puppeteer for fast headless testing.
• WebDriver - uses webdriverio to run tests via WebDriver protocol.
• Protractor - helper empowered by Protractor to run tests via WebDriver protocol.
• TestCafe - cheap and fast cross-browser test automation.
• Nightmare - uses Electron and NightmareJS to run tests.
• Appium - for mobile testing with Appium

And more to come...

Why CodeceptJS?

CodeceptJS is a successor of Codeception, a popular full-stack testing framework for PHP. With CodeceptJS your scenario-driven functional and acceptance tests will be as simple and clean as they can be. You don't need to worry about asynchronous nature of NodeJS or about various APIs of Selenium, Puppeteer, Protractor, TestCafe etc, as CodeceptJS unifies them and makes them work as they were synchronous.

Features

• Based on Mocha testing framework.
• Designed for scenario driven acceptance testing in BDD-style
• Uses ES6 natively without transpiler.
• Also plays nice with TypeScript.
• Smart locators: use names, labels, matching text, CSS or XPath to locate elements.
• Interactive debugging shell: pause test at any point and try different commands in a browser.
• Easily create tests, pageobjects, stepobjects with CLI generators.

Install

npm install codeceptjs --save

Move to directory where you'd like to have your tests (and codeceptjs config) stored, and run

npx codeceptjs init

to create and configure test environment. It is recommended to select WebDriverIO from the list of helpers, if you need to write Selenium WebDriver tests.

After that create your first test by executing:

npx codeceptjs generate:test

Now test is created and can be executed with

npx codeceptjs run

If you want to write your tests using TypeScript just generate standard Type Definitions by executing:

npx codeceptjs def .

Later you can even automagically update Type Definitions to include your own custom helpers methods.

Note that CodeceptJS requires Node.js version 6.11 or later.

Usage

Learn CodeceptJS by examples. Let's assume we have CodeceptJS installed and WebDriverIO helper enabled.

Basics

Let's see how we can handle basic form testing:

Feature('CodeceptJS Demonstration');

Scenario('test some forms', (I) => {
  I.amOnPage('http://simple-form-bootstrap.plataformatec.com.br/documentation');
  I.fillField('Email', '[e-mail]');
  I.fillField('Password', '123456');
  I.checkOption('Active');
  I.checkOption('Male');
  I.click('Create User');
  I.see('User is valid');
  I.dontSeeInCurrentUrl('/documentation');
});

All actions are performed by I object; assertions functions start with see function. In this examples all methods of I are taken from WebDriver helper, see reference to learn how to use them.

Let's execute this test with run command. Additional option --steps will show us the running process. We recommend use --steps or --debug during development.

codeceptjs run --steps

This will produce an output:

CodeceptJS Demonstration --
 test some forms
 • I am on page "http://simple-form-bootstrap.plataformatec.com.br/documentation"
 • I fill field "Email", "[e-mail]"
 • I fill field "Password", "123456"
 • I check option "Active"
 • I check option "Male"
 • I click "Create User"
 • I see "User is valid"
 • I dont see in current url "/documentation"
 ✓ OK in 17752ms

CodeceptJS has an ultimate feature to help you develop and debug you test. You can pause execution of test in any place and use interactive shell to try different actions and locators. Just add pause() call at any place in a test and run it.

Interactive shell can be started outside test context by running:

codeceptjs shell

Actions

We filled form with fillField methods, which located form elements by their label. The same way you can locate element by name, CSS or XPath locators in tests:

// by name
I.fillField('user_basic[email]', '[e-mail]');
// by CSS
I.fillField('#user_basic_email', '[e-mail]');
// don't make us guess locator type, specify it
I.fillField({css: '#user_basic_email'}, '[e-mail]');

Other methods like checkOption, and click work in a similar manner. They can take labels or CSS or XPath locators to find elements to interact.

Assertions

Assertions start with see or dontSee prefix. In our case we are asserting that string 'User is valid' is somewhere in a webpage. However, we can narrow the search to particular element by providing a second parameter:

I.see('User is valid');
// better to specify context:
I.see('User is valid', '.alert-success');

In this case 'User is valid' string will be searched only inside elements located by CSS .alert-success.

Grabbers

In case you need to return a value from a webpage and use it directly in test, you should use methods with grab prefix. They are expected to be used inside async/await functions, and their results will be available in test:

var assert = require('assert');

Feature('CodeceptJS Demonstration');

Scenario('test page title', async (I) => {
  I.amOnPage('http://simple-form-bootstrap.plataformatec.com.br/documentation');
  var title = await I.grabTitle();
  assert.equal(title, 'Example application with SimpleForm and Twitter Bootstrap');
});

The same way you can grab text, attributes, or form values and use them in next test steps.

Before/After

Common preparation steps like opening a web page, logging in a user, can be placed in Before or Background:

Feature('CodeceptJS Demonstration');

Before((I) => { // or Background
  I.amOnPage('http://simple-form-bootstrap.plataformatec.com.br/documentation');
});

Scenario('test some forms', (I) => {
  I.click('Create User');
  I.see('User is valid');
  I.dontSeeInCurrentUrl('/documentation');
});

Scenario('test title', (I) => {
  I.seeInTitle('Example application');
});

PageObjects

CodeceptJS provides the most simple way to create and use page objects in your test. You can create one by running

codeceptjs generate pageobject

It will create a page object file for you and add it to config. Let's assume we created one named docsPage:

const { I } = inject();

module.exports = {
  fields: {
    email: '#user_basic_email',
    password: '#user_basic_password'
  },
  submitButton: {css: '#new_user_basic input[type=submit]'},

  sendForm(email, password) {
    I.fillField(this.fields.email, email);
    I.fillField(this.fields.password, password);
    I.click(this.submitButton);
  }
}

You can easily inject it to test by providing its name in test arguments:

Feature('CodeceptJS Demonstration');

Before((I) => { // or Background
  I.amOnPage('http://simple-form-bootstrap.plataformatec.com.br/documentation');
});

Scenario('test some forms', (I, docsPage) => {
  docsPage.sendForm('[e-mail]','123456');
  I.see('User is valid');
  I.dontSeeInCurrentUrl('/documentation');
});

License

MIT © CodeceptJS Team