Last updated: Oct 16, 26 03:01 UTC | Permalink

10 - Tests With Larger Scope

Learning Objectives:

In this module, you will learn to:

• Design test cases for code using fakes, mocks and spies
• Explain why you might need a test double in your testing
• Explain why you might need tests that are larger than unit tests
• Explain how large, deployed systems lead to additional testing challenges

Lecture Slides:

• Testing Larger Things Slides PDF, PPT

Important Dates:

• Preliminary Project Plan Due Friday Oct 16, 2026 by 5pm (ET)
• Individual Project 3 Due Wednesday, Oct 21, 2026 by 5pm (ET)

Tutorials

• UI Testing with Playwright

Activity

• Testing Socket.io Controllers with Mocks and Spies

Resources

• Code from slides
• Software Engineering at Google: “Larger Testing”
• Martin Fowler on Fakes, Mocks, Spies and More
• Vitest cheat sheet — includes lots of coverage of Vitest mocking
• Aye Spy, visual regression testing