ORM

Database Testing

ORM Testing Patterns: How to Test SQLAlchemy, Prisma, and TypeORM Correctly

ORMs hide SQL behind object abstractions, which makes application code cleaner but creates a testing trap: it's tempting to mock the ORM and test nothing real. Mock-based ORM tests can show 100% coverage while completely missing query logic bugs, N+1 problems, and constraint violations that only

Drizzle

Testing Drizzle ORM: Query Testing, Schema Validation, and CI Migrations

Drizzle ORM's SQL-first design makes it highly testable: you can run queries against in-memory SQLite for fast unit tests, swap in a real Postgres container for integration tests with minimal code changes, and validate your schema definitions statically. This post walks through all three layers and