Create tests for SalesItem that test whether the findMostHelpfulComment method works as expected. Note that this method returns a Comment object. During your testing, you can use the Get button in the method result dialog to get the result object onto the object bench, which then allows you to make further method calls and add assertions for this object. This allows you to identify the comment object returned (e.g., by checking its author). You can also assert that the result is null or not null, depending on what you expect.