Introducing new types to carry test and assertion results

Matthias Noback's blog provides insights into software architecture, design patterns, and clean code principles. With a focus on PHP and Symfony, Matthias shares practical advice, real-world experiences, and  reflections on software development. Developers can learn about domain-driven design, hexagonal architecture, and testing strategies, gaining  knowledge to build maintainable and scalable applications.

Matthias Noback

This post demonstrates refactoring a Fortran test framework to use custom types for returning test and assertion errors instead of simple boolean values. It introduces `assertion_failed_t` and `test_failed_t` types to carry error messages from assertions through tests to the test runner, enabling better error reporting. The implementation uses allocatable return types to make errors optional, type extension for compatibility, and optional custom messages for additional context in test failures.

Fortran - Testing - Returning test and assertion errors

Printing the test error using the progress printer