Lightning Aura Components Developer Guide

What Is the Lightning Component Framework?
Quick Start
Creating Components
Using Components
Communicating with Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
Using JavaScript
Working with Salesforce Data
Testing Components with Lightning Testing Service
How Lightning Testing Service Works
Install Lightning Testing Service
Get Started with Lightning Testing Service
Explore the Example Test Suites
Write Your Own Tests
Use Other Frameworks
Debugging
Performance
Reference
PDF

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Testing Components with Lightning Testing Service

Use Lightning Testing Service (LTS) to ensure your components perform as expected. LTS is a full suite of tools and services integrated with Salesforce DX to make testing easy.

Automated tests are the best way to achieve predictable, repeatable assessments of the quality of your custom code. Writing automated tests for your custom components gives you confidence that they work as designed, and allows you to evaluate the impact of changes, such as refactoring, or of new versions of Salesforce or third-party JavaScript libraries.

LTS supports testing with standard JavaScript test frameworks. It provides easy-to-use wrappers for using Jasmine and Mocha. If you prefer to use an alternative test framework, you can wrap it yourself.