Hi,
A few weeks ago I discovered the eclipse plugin for EMMA
(http://www.eclemma.org/). EMMA (http://emma.sourceforge.net/) is a Java
code coverage tool.
I used the tool to check the test coverage of the annotator projects in
the Sandbox.
The tool is fully integrated to eclipse and easy to use. It shows with
code highlighting and special view those places in the code that are not
covered by any test.
Given that it is easy to create missing tests and make an assumption
about how good the test coverage currently is.
The website http://www.eclemma.org/ has some nice screenshots so that
you can get an impression.
It is also possible to integrate EMMA to the build environment so that
you can get a test coverage for each build after running
the automated JUnit tests. Maybe something for the future. :-)
-- Michael