Test Database Not Resetting Between Tests in Windsurf Project
Tests in your Windsurf-generated project fail intermittently because the database retains data from previous test runs. Tests that pass individually fail when run together, test order matters, and adding a new test breaks existing ones. The test suite is unreliable and developers lose confidence in the results.
Cascade generates tests that create database records but doesn't clean them up afterward. Test A inserts a user, Test B expects an empty users table, and Test B fails because Test A's user is still there. The problem gets worse as more tests are added, creating an increasingly tangled web of data dependencies.
The failures are often non-deterministic — they depend on which tests run first, whether a previous test run completed fully, and sometimes even on timing. This makes them extremely hard to debug.
Error Messages You Might See
Common Causes
- No afterEach cleanup — Tests create database records but don't have afterEach hooks to clean up created data
- Shared database between test runs — Tests use the development database instead of a dedicated test database that gets reset
- No transaction rollback — Tests don't wrap operations in transactions that get rolled back, so changes persist
- Truncation order wrong — Tables with foreign keys must be truncated in the correct order, or truncation fails silently
- Seed data conflicts — Database seeds run before tests and create data with fixed IDs that conflict with test-created records
- Parallel tests sharing state — Tests running in parallel write to the same tables and interfere with each other
How to Fix It
- Use transactions with rollback — Wrap each test in a database transaction and roll it back in afterEach. This is the fastest and cleanest approach
- Add truncation in beforeEach — Truncate all tables before each test with TRUNCATE TABLE ... CASCADE (PostgreSQL) or DELETE FROM (SQLite)
- Use a dedicated test database — Configure a separate database for tests in .env.test. Never run tests against your development or production database
- Install a test cleanup library — Use libraries like pg-mem (in-memory PostgreSQL), or prisma's test utils that handle cleanup automatically
- Isolate parallel tests — If running tests in parallel, use separate schemas or databases per worker to prevent interference
- Reset sequences and IDs — After truncation, reset auto-increment sequences so tests don't depend on specific ID values
Real developers can help you.
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
Victor Denisov
Developer
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale.
In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals.
I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software.
Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
Nam Tran
10 years as fullstack developer
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
Bastien Labelle
Full stack dev w/ 20+ years of experience
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Should I use truncation or transaction rollback for test cleanup?
Transaction rollback is faster and cleaner — each test runs in a transaction that gets rolled back, leaving no trace. However, it doesn't work if your code commits transactions internally. Truncation is simpler but slower because it actually deletes and recreates data.
Why do my tests pass individually but fail together?
This is a classic sign of missing test isolation. One test creates data that another test doesn't expect. Add cleanup (truncation or rollback) in beforeEach or afterEach hooks so each test starts with a known database state.