Replaced assertNotEquals with assertNotSame to fix compile error.

Sure hope I am using "Git" properly!  Sorry for any mistakes I might make! :->  I would like to contribute to this project, so I cloned the repository, created a NetBeans project, and saw right away that there was a problem with this file.  So I figured this would be a good way to A) contribute a fix, and B) test my knowledge of Git.