Hello,
There weren't any tests for kmacro.el, so I have written some.

Two things that may yet need to be done:

1. These tests make extensive use of two macros, called
kmacro-tests-should-call and kmacro-tests-should-not-call. They are
context-creating macros which add advice to named functions for the
duration of a test. I think that these two macros would be a useful
addition to ERT, and I'll submit that idea as a separate patch.

2. I found several minor bugs in the process of writing these, leading
to tests marked as :expected-result :failed. One is a way to create an
empty keyboard macro using the mouse and the rest are ways to get
kmacro-step-edit-macro to behave oddly. I haven't sent them to
bug-gnu-emacs yet. When I do so would it be better to send them
individually or put all the step-edit ones in one report?

My copyright assignment paperwork was finished as of Nov 2.