Low level input parsers and such code should have unit tests excercizing it. Use the make check command to run all the tests. If you run it from a subdirectory only the tests in that directory will be run.

To check for memory errors or memory leaks, run make memcheck or make leakcheck respectively. This requires valgrind be installed.

Build adcli with the --enable-coverage configure option to build code coverage support.

Once you've done that you can either use make coverage to build code coverage information. Alternatively (and this is usually easier) you can use git coverage to easily check whether you've tested the lines changed by a patch.