foobarbaz
Success: window.getSelection() is ar.
Success: s.extend(span2.firstChild, 4) raised IndexSizeError: Failed to execute 'extend' on 'Selection': The offset 4 is larger than the node's length (3)..
Success: s.extend(span2.firstChild, -1) raised IndexSizeError: Failed to execute 'extend' on 'Selection': The offset 4294967295 is larger than the node's length (3)..
Success: window.getSelection() is b.
Success: window.getSelection() is arbaz.
Success: s.extend() raised TypeError: Failed to execute 'extend' on 'Selection': 1 argument required, but only 0 present..
Success: s.extend(null, 0) raised TypeError: Failed to execute 'extend' on 'Selection': parameter 1 is not of type 'Node'..