Concurrent Testing in Elixir with Ecto Sandbox

Slow test suites stall development, yet running database-dependent tests in parallel often leads to race conditions and corrupted state. In Elixir, leveraging the database sandbox allows you to run your test suite concurrently without sacrificing data integrity. This text-based course guides you through configuring your database adapters to support isolated, concurrent testing. You will master how to manage database transactions so that each test runs in its own self-contained process. What you'll learn: Understand the core architecture of database sandboxing and connection ownership; Configure database pools and adapters for safe asynchronous test execution; Write concurrent tests that run in parallel without interfering with shared state; Share database connections explicitly when testing code that spawns separate processes; Debug common sandboxing issues and connection timeouts in test suites. The course begins with foundational concepts of database transactions and the connection ownership model, then moves systematically into practical setup, configuration, and advanced testing patterns. This course is designed for Elixir developers who understand basic database queries and want to optimize their test suites for speed and safety. Start writing faster, more reliable concurrent tests today.