I'm getting a crash in -[NSTableView _isGroupRow:] in my unit tests if I try to 
run the main run loop.

In my document's window, I have an NSOutlineView with its delegate and 
dataSource set to the window controller. In some unit tests, I want to run the 
main event loop to give some bindings a chance to do their thing, but this 
causes a crash. Once, instead of crashing, there was a message logged that some 
random class (whose name I can't remember) doesn't respond to 
-[outlineView:isGroupItem:], as if the outline view's delegate were set wrong. 
I added a check for that in the unit test and it was fine. When I run the app 
normally everything works.

I create the document by calling [[NSDocumentController 
sharedDocumentsController] openUntitledDocument:YES error:&e]. Is there 
something else I need to do so that everything get set up correctly?

-- 
David Catmull
uncom...@uncommonplace.com
http://www.uncommonplace.com/

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