Taking advantage of browse everything filename since box does not includ...

...e the file name in the url.
@mjgiarlo  The answer is no that is not the same...  If you remove the lambda you get:
Failure/Error: expect( post :create, selected_files: @json_from_browse_everything, batch_id: "sample:batch_id").to change(GenericFile, :count).by(2)
       expected #count to have changed by 2, but was not given a block