We have recently completed two examples that deal with different aspects of Google Docs:
Here the issue is whether you can easily create a new spreadsheet, or open an existing one, manipulate it easily, and validate results. You can see the results at this page: Testing Google Docs -- Spreadsheet Option.
- Text Documents
In this case the issue is similar, but now the job is just to be able to perform basic actions on a Google Docs document. Our example can be seen here: Testing Google Docs -- Document Option.