Writing Unit Tests for Extensions

Welcome! In this lesson, we'll dive into unit testing for browser extensions. Unit testing is a way to test small, isolated parts of your code, often called "units."

For extensions, this means testing individual functions or modules without needing to run the full browser environment. It's about ensuring each piece works correctly on its own.

Testing is crucial for building robust browser extensions. Here's why:

• Reliability: Catches bugs early, ensuring your extension works as expected.
• Maintainability: Makes future changes safer, preventing accidental breakage (regressions).
• API Changes: Helps adapt to updates in browser APIs (like Manifest V3 changes).
• Complex Logic: Ensures tricky background or content script logic is sound.