Enhancing Test Automation with Playwright: A Custom Page Object Model Approach

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Enhancing Test Automation with Playwright: A Custom Page Object Model Approach
Zeeshan Mukhtar Global Head
Zeeshan Mukhtar
Global Head

March 13, 2025

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Table of Contents
Abstract
This article explores the implementation of Playwright as a test automation framework, leveraging a Custom Page Object Model (POM) in TypeScript. We discuss the framework’s architecture, benefits, and key features, including cross-browser support, API testing integration, and CI/CD automation. The document provides insights into authentication setup, API testing, test execution, and reporting, followed by an in-depth analysis of challenges encountered and their resolutions. The paper concludes with key takeaways and future improvements for enhancing automated testing efficiency.
Introduction

In our journey to automate UI and backend testing efficiently, we opted for Playwright as our automation framework. Playwright offers a robust, scalable, and flexible environment for end-to-end testing, supporting modern web applications with enhanced reliability. Additionally, it allows us to test backend API calls under the same framework, reducing dependencies on separate API testing tools.

To improve maintainability and readability, we implemented a Custom Page Object Model (POM) in TypeScript. This approach ensures modularity, as each page in our web application has a dedicated locator class containing all relevant elements.

The Problem
Modern web applications require reliable, scalable, and efficient test automation to ensure software quality. Traditional testing frameworks often struggle with race conditions, slow execution times, and lack of cross-browser support. Additionally, maintaining UI and API test cases separately increases complexity and redundancy. To address these challenges, an optimized test automation framework that seamlessly integrates UI and API testing with efficient test execution strategies is needed.

key Objectives

The Playwright Automation Framework is designed to:
  • Provide a scalable and maintainable test automation solution.
  • Integrate UI and API testing into a single framework.
  • Enhance test execution speed through parallelization.
  • Ensure cross-browser compatibility for web applications.
  • Automate authentication processes to improve efficiency.
  • Simplify debugging with built-in tracing and reporting.

Why Playwright?

Playwright provides several key advantages, making it our preferred choice for test automation:

  • Cross-browser and cross-platform support: Enables testing on Chromium, Firefox, and WebKit browsers across multiple OS platforms.
  • Parallel execution: Runs tests in parallel, reducing execution time significantly.
  • Race condition handling: The framework is capable of running parallel tests without race conditions, ensuring test stability and reliability.
  • API testing integration: Allows us to test backend API calls alongside UI testing within the same framework.
  • Auto-waiting mechanism: Ensures stable test execution by automatically waiting for elements to be available.
  • Rich debugging capabilities: Offers video recording, tracing, and console logs for enhanced debugging.

Playwright Automation Framework

The Playwright Automation Framework is structured as follows:

Data Management

  • Includes credentials.json and secret.json for managing login credentials and secure keys such as OAuth tokens.

Page Object Model (POM)

  • UI – PageObjectManager.ts: Manages all page objects in a centralized class.
  • UI – DashboardPage.ts: Contains locators for dashboard interactions.
  • UI – CreateCardPage.ts: Contains locators for card creation interactions.

API Payloads

  • CreateCardPayload.json: Defines request body data for creating a card.
  • UpdateCardPayload.json: Defines request body data for updating a card.
Test Organization
  • API Test: Maintains backend API test cases.
  • UI Test: Manages frontend test cases, including end-to-end testing.
Environment and Configuration
  • .env.secret: Stores environment variables.
  • .gitignore: Lists files to be excluded from version control.
  • globalSetup.ts: Contains global methods executed before test runs.
  • playwright.config.ts: Holds Playwright test configurations such as browser options and test settings.
Test Reporting and Results
  • test-result: Stores test traces and snapshots, logged only in case of failures.
  • XML and HTML reports are generated for test analysis.

Custom Page Object Model (POM)

To improve code reusability, scalability, and maintainability, we structured our framework using a Custom Page Object Model. Each page in our web application is represented by a separate locator class, encapsulating all the elements and their interactions.

Page Object Model
Page Locator Class
  • A TypeScript class that defines a login automation script using Playwright. It includes locators for the username, password fields, and a login button.
Page Locator Class
Authentication Setup
  • For efficiency, we set up login at the beginning of the test and use storage state to persist authentication across test cases. This eliminates the need to log in repeatedly, enhancing test performance.
Auth Setup
Playwright API Testing

  • Playwright provides built-in support for API testing, allowing us to make HTTP requests and validate responses directly within our test cases.

API Test for Creating a Card

API Test

API Test for Fetching a Card

API Fetch

API Test for Updating a Card

API Update

API Test for Deleting a Card

API Delete

These tests demonstrate how Playwright can be used for API testing alongside UI automation, making it a powerful tool for full-stack testing.

Test Execution & Reporting

To maintain test execution records, we generate XML and HTML reports post-test execution. This helps in analyzing test results and debugging failures efficiently.

Test Report
Jenkins Integration for CI/CD

We have integrated Playwright tests into our Jenkins pipeline, enabling daily automated test runs. This ensures continuous monitoring of our application’s health and allows early detection of regressions.

Advanced Jenkinsfile for Playwright Pipeline

Below is an advanced Jenkinsfile that supports parallel execution, test reporting, and integration with Jenkins:

Jenkins file

Challenges and Resolutions

Challenge Resolution
Handling race conditions Implemented Playwright’s auto-waiting mechanism and retry strategies.
Managing large test data Used environment-specific test data storage and dynamic test data generation.
CI/CD pipeline failures Added retry mechanisms, improved logging, and optimized test parallelization.
Test execution delays Enabled parallel execution, optimized selectors, and reduced unnecessary UI interactions.
Debugging complex failures Integrated Playwright’s tracing and video recording for better diagnostics.
Browser compatibility issues Conducted rigorous cross-browser testing with real device simulation.

Key Takeaways

The successful automation of the custom POM and automated API testing led to several valuable insights:

  • Scalability & Maintainability: Custom POM enhances modularity and reusability.
  • Unified UI & API Testing: Playwright eliminates the need for separate API testing tools.
  • Cross-Browser & Parallel Execution: Faster and more reliable test runs across environments.
  • CI/CD Ready: Seamless integration with Jenkins ensures continuous delivery.
Final Words

By adopting Playwright and a Custom Page Object Model, we achieved a scalable, maintainable, and robust automation framework. The ability to test both UI and backend API calls within the same framework, along with parallel execution, race condition handling, auto-waiting, and debugging capabilities, makes Playwright a powerful tool for modern web application testing.

 

This automation has significantly improved our test reliability, execution speed, and CI/CD efficiency, ensuring high software quality and better user experience.

Author

Zeeshan Mukhtar

 

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