Adding Tests to Your Base44 Project

Most Base44 projects ship with zero tests. This means every change is a gamble — you might fix one thing and break three others without knowing until a user reports it. Tests are automated checks that verify your app works correctly. They run in seconds and catch bugs before your users do.

Base44 generates no automated tests. After exporting the project, set up Jest or Vitest for unit tests and Supertest for API endpoint testing. Add a test database with seed data for integration tests. Set up Playwright for end-to-end testing of critical workflows

Prioritize testing authorization boundaries — verify that a user cannot access or modify another user's data. Test all CRUD operations against the actual database schema. Test that deleting records correctly cascades (or doesn't cascade) based on your data model's intent

Unit tests check individual functions in isolation — does this function calculate the right total? Integration tests check that multiple pieces work together — does submitting this form save to the database? End-to-end (E2E) tests simulate a real user — can someone sign up, log in, and complete a purchase? Start with E2E tests for your most critical flows, then add integration tests for your API endpoints.

Set up your tests to run automatically on every code push using GitHub Actions or a similar CI service. This way, you'll know immediately if a change breaks something. A basic CI pipeline runs your tests, checks for TypeScript errors, and builds the project. If any step fails, the push is flagged before it reaches production.