Understanding Playwright Assertions | Advanced Playwright TypeScript Tutorial | Part V | LambdaTest

About The Video

Dive into the world of Playwright with TypeScript in this detailed tutorial by 𝐕𝐢𝐠𝐧𝐞𝐬𝐡 𝐒𝐫𝐢𝐧𝐢𝐯𝐚𝐬𝐚𝐧, a seasoned expert in automation testing. This session is a comprehensive guide to mastering Playwright’s assertion capabilities, a vital component to ensure the accuracy of your automated test scripts.

In this tutorial, you will learn everything from basic assertion concepts to advanced techniques, including verifying element visibility, presence, text matching, attribute validation, URL checks, and even screenshot-based comparisons for visual testing.

Vignesh also explains the role of hard and soft assertions in managing test execution effectively. With clear examples and practical demonstrations, this tutorial provides all the tools you need to enhance your end-to-end testing with Playwright.

Video Chapters

00:00 Introduction

02:15 What is Assertion

02:57 Assertions - Visible/Hidden

10:35 Assertions - Present/Not Present

14:55 Assertions - Enabled/Disabled

16:20 Assertions - Text Match/Mismatch

18:45 Assertions - Element Attributes

20:22 Assertions - URL and Title

26:50 Assertions - Screenshot

31:20 Closing Words

Key Topics Covered

Introduction to Assertions

Assertions are critical in verifying the correctness of applications. They ensure that the application behaves as expected, aiding in validation, error detection, and improving test automation quality. The video explains the difference between hard and soft assertions, emphasizing their impact on test execution.

Types of Assertions in Playwright

The tutorial discusses several assertion types:

Visible and Hidden Assertions: Check whether an element is visible or hidden.

Presence Assertions: Validate if elements are present or absent in the DOM.

Enabled and Disabled Assertions: Determine whether a button or field is functional or restricted.

Text Match and Mismatch Assertions: Compare text content of elements.

Attribute Assertions: Verify attributes like placeholder, name, or class.

URL and Title Assertions: Ensure correct navigation through URL and title checks.

Screenshot Assertions: Perform pixel-by-pixel visual comparisons for UI consistency.

Practical Demonstrations

The video includes hands-on examples of each assertion type, showing how to use locators effectively and write robust test scripts. Examples also cover handling unique and non-unique elements and debugging common issues.

Advanced Features

Screenshot assertions are highlighted as a powerful tool for visual regression testing. The pixel-by-pixel comparison ensures consistency, making it ideal for projects focusing on visual validation.

Debugging and Reporting

The video explains how to handle failures, debug issues, and interpret test reports. It also covers scenarios where intermittent failures occur due to website downtimes or locator mismatches.

Test Execution

Tests are demonstrated locally using Chromium, with step-by-step instructions for running and validating assertions. Tips for integrating tests into CI pipelines are also provided.

This tutorial is part of a Playwright with TypeScript playlist, offering a clear pathway for viewers to advance from beginner to expert in automation testing. Its practical examples and structured approach make it a valuable resource for developers and testers alike.

Related Blogs & Hubs

Playwright End To End Testing Tutorial: A Complete Guide

Playwright Tutorial: Getting Started With Playwright Framework

How to Perform Playwright Screenshot Comparison