Automated tests are beneficial, but entail extra effort. We argue that this effort can be reduced by using a shared test suite between projects that implement the same behavior, such as standardized protocols. To benefit as many projects as possible, such a shared test suite is ideally usable by projects implemented in many different programming languages.

We propose Ports, a system for writing and using shared test suites for projects from different programming languages. In this demo, we will introduce the first Ports prototype by writing a small test suite and making it runnable in Python and Smalltalk. We then show how the approach scales by giving a tour of a full SMTP test suite runnable in Ruby, Python, and Smalltak.