There are some who treat the phrase "public interface" as meaning the parts of a class which use the `public` keyword. There are other people who treat the phr

There are some who treat the phrase "public interface" as meaning the parts of a class which use the `public` keyword. There are other people who treat the phrase "public interface" as meaning whichever way that users interact with the system, e.g. commandline arguments, HTTP request parameters, exposed modules of a library, etc. Sounds like you're using the first terminology and others are using the second. (I wrote about this at http://chriswarbo.net/blog/2017-11-10-unit_testing_terminology.html http://chriswarbo.net/blog/2017-11-10-unit_testing_terminolo... )