Daily Bulletin

Upcoming SEA Tutorial and Discussion: Fortran Unit Testing and pFUnit

January 21, 2026

Join the UCAR Software Engineering Assembly (SEA) at 2 pm on February 12th for a tutorial and open discussion on unit testing Fortran code with pFUnit, a Fortran testing framework developed by NASA’s Goddard Space Flight Center for testing high-performance Fortran libraries. In this session, NSF NCAR software engineer Andy Stokely will highlight how pFUnit simplifies the process of writing tests and lowers the barrier to adopting thorough testing practices in Fortran codebases. The session will begin with a tutorial demonstrating how pFUnit can be used to develop a Fortran library using Test-Driven Development (TDD).

Following the tutorial, the discussion will expand to examine the role of unit testing in scientific and high-performance Fortran development, including how testing can improve code quality, support long-term maintainability, and enable safer refactoring as requirements evolve. The conversation will also focus on how testing can facilitate more effective collaboration between software engineers and scientists. Participants are encouraged to share experiences, challenges, and perspectives related to adopting testing practices in scientific software projects.

Discussion topics will include:

  • Applying Test-Driven Development to Fortran libraries
  • Using unit tests to define expected behavior and verify correctness
  • How testing supports maintainability and safe refactoring
  • Ways unit testing can improve collaboration between scientists and software engineers

All are welcome, regardless of prior experience with pFUnit or unit testing. If you are UCAR/NCAR staff, please use this link to add the event to your Google Calendar. If you are not staff but would like to attend, email the SEA Committee for an invite link.