The test for "Greater Wishlists" has boolean values.
For example:

{:name=>"humming top", :size=>false, :clatters=>"a bit", :weight=>"light"}

But a present looks like this:

{:size=>"large", :clatters=>"a bit", :weight=>"medium"}

The description says, that only the values
"small", "medium", "large"
will appear.

So I have some trouble "mapping the boolean to a string".