One of Copilot's most valuable features is generating unit tests — one of the most skipped but important parts of development.

How to Generate Tests

1. Open the function or class you want to test
2. Open Copilot Chat
3. Type /tests or "Write unit tests for this function"
4. Copilot generates a full test file

Best Practices

• Review generated tests — they're a starting point, not final
• Ask Copilot to add edge cases: "Add tests for null input and empty array"
• Ask for specific test frameworks: "Use Jest" or "Use pytest"

Reference:

Generating tests with Copilot

https://docs.github.com/en/copilot/using-github-copilot/best-practices-for-using-github-copilot