Writing a JUnit test in Eclipse is out-of-the-box a pain, because when you press CTRL + SHIFT + O to organize imports, Eclipse will remove:
import static org.junit.Assert.*;
Now when you want to use JUnit assert method, you either need to add correct import, or use it without import. Unless you know about configuring favorites in the preferences. Goto Window -> Preferences -> Java -> Editor -> Content Assist -> Favorites and add New Type:
Now when you type assert and press CTRL + SPACE, Eclipse content assist will also show proposals for static methods from org.junit.Assert.