Just some quick notes on how to get the eclipse IDE together with its bazaar plugin and scons plugin working.
Of course, install eclipse and CDT. Either simply from their homepage or use the packages for your operating system.
Ubuntu Packages to Install would be:
for Unit testing:
If not done already you need to have a valid source directory of mixxx, as outlined here: compiling_on_linux or compiling_on_os_x or compiling_on_windows