Hi, I think it's sufficient to test the happy path for the range that currently works and defer testing error conditions for some other time. The point is to make sure we don't accidentally regress to a smaller range and break an app that starts relying on the fix that you've added.
http://gwt-code-reviews.appspot.com/1601805/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
