ocaml-testing

Organize OCaml unit tests by maintaining a 1:1 mapping between lib/*.ml modules and test/test_*.ml files, keeping each test isolated and descriptively named within your Dune workflow.

Write isolated OCaml tests by ensuring each test runs independently without hidden state dependencies. Use clear, descriptive naming conventions for test functions and test suites to improve long-term maintainability.

Yes, Alcotest integrates with Eio for mock-based testing in OCaml projects. You can use Eio mocks within your Alcotest test suites to simulate effects and isolate unit tests from external dependencies.

Yes, you can use cram tests within a Dune workflow to verify OCaml library command-line behavior. Cram tests complement unit tests by capturing executable output and ensuring CLI interfaces remain stable.

Apply test-driven development to OCaml projects when transitioning a library to an application, ensuring scalable test suites. Adopt structured unit test patterns early to maintain reliability as module complexity increases.

OCaml test suites become hard to maintain without structured organization, consistent naming, and isolated tests. Adopting a 1:1 lib-to-test mapping and mock-based patterns prevents state coupling and ensures reliability.