Additional rename refactoring that renames methods from camel cased names to underscored names.
'ThisIsATestMethod' will become 'This_Is_A_Test_Method'
I have personally mapped it to CMD+OPTION+R on my mac.
Recent change notes
v1.1 - New feature - applying the refactoring twice adds no extra underscore to already existing underscores. v1.0.1 - Refactor some classes. Avoid object creation for each test name refactoring. v1.0 - Can refactor test methods. Also adds additional suggestion with "test_" prefix. (Note that this plugin has only been tested on *.java files)