I'm trying to test an apex class that scans a chatter group for posts.  I have a query in my class that queries on the CollaborationGroupFeed object.  In my test class I have the following code:

Test.startTest();
     CollaborationGroup cg = new CollaborationGroup(Name='Test Group', CollaborationType='Public');
     insert cg;
            
     // Create Chatter Post
     FeedItem testFeed1 = new FeedItem(Body='Test Feed 1 Post', ParentId = cg.Id, Type='TextPost');
     insert testFeed1;
            
     // Create Chatter Comment
     FeedComment testFeed1Comment = new FeedComment(CommentBody='Test Feed 1 Comment', FeedItemId=testFeed1.Id, CommentType='TextComment');
     insert testFeed1Comment;
            
     // Create Chatter Post
     FeedItem testFeed2 = new FeedItem(Body='Test Feed 2 Post', ParentId = cg.Id, Type='TextPost');
     insert testFeed2;
            
     // Create Chatter Comment
     FeedComment testFeed2Comment = new FeedComment(CommentBody='#answer Test Feed 2 Comment', FeedItemId=testFeed2.Id, CommentType='TextComment');
     insert testFeed2Comment;
            
     List<CollaborationGroupFeed> feeds = [Select Body from CollaborationGroupFeed];
     system.debug('-------------- ' + feeds);
Test.stopTest();

 When I do a query on CollaborationGroupFeed to confirm the records, it returns 0 records.  What am I doing wrong?