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Phase 13 · Testing the Full Stack

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Unit Testing (Backend)

Part of the Full Stack Developer Roadmap.

Summary

Testing individual backend functions — validation logic, utility functions, service-layer code — in isolation from the database and network.

How to Learn This

  • 1Write unit tests for 3-4 pure backend functions using Jest.
  • 2Mock a database call so the test doesn't need a real database.
  • 3Practice testing edge cases, not just the happy path.

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Unit Testing (Frontend)

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Integration Testing

More topics in Testing the Full Stack

Unit Testing (Frontend)Integration TestingAPI TestingEnd-to-End Testing (Playwright/Cypress)Testing Authentication Flows
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