The Galileo version of Eclipse doesn’t ship with a default keybinding for creating a unit test for the current class, but you can add one easily enough. Navigate to Preferences > General > Keys, and search for “junit test case”:

Click the “Binding” field, hit the keystroke (I used shift-control-option-command-t), and click Apply.

I haven’t found a way to jump to the referring test for a given class, though. IDEA’s JUnit plugin had that and I miss it. :-\