TL;DR
This post explains what is programmer testing according to Black Box Software Testing Foundations course (BBST) created by Rebecca Fiedler, Cem Kaner and James Bach.
Definition
In Agile lifecycle project, you could meet with Programmer tests term. Programmer tests are not just unit tests.
Programmer tests are tests written by programmers.
Example
So, programmer tests are implementation level tests:
- unit tests
- integration tests
- data flow tests
- performance tests of unit or several units (module)