Running tests is easy. Just change your working directory to the jsdoc folder and run the following command on Windows:
jsdoc -T
Or on OS X, Linux, and other POSIX-compliant platforms:
./jsdoc -T
If you can't get the short-form commands to work, try invoking Java directly:
java -cp lib/js.jar org.mozilla.javascript.tools.shell.Main \
-modules node_modules -modules rhino -modules lib -modules . \
jsdoc.js -T
Adding tests is pretty easy, too. You can write tests for JSDoc itself (to make sure tags and the parser, etc. are working properly), tests for plugins, and/or tests for templates.
JSDoc 3 uses Jasmine (https://github.com/pivotal/jasmine) as its testing framework. Take a look at that project's wiki for documentation on writing tests in general.
Take a look at the files in the test directory for many examples of
writing tests for JSDoc itself. The test\fixtures directory hold fixtures
for use in the tests, and the test\specs directory holds the tests themselves.
Tests for plugins are found in the plugins\test directory. Plugins containing
tests that were installed with the Jakefile install task will be run automatically.
TODO