1080
1080
search = graph._make_breadth_first_searcher(['head'])
1082
1082
# NULL_REVISION and ghost1 have not been returned
1083
(set(['head']), (set(['head']), set(['child', 'ghost1']), 1),
1084
(set(['head']), set(['child', NULL_REVISION, 'ghost1']), 1),
1084
1085
['head'], None, [NULL_REVISION, 'ghost1']),
1085
1086
# ghost1 has been returned, NULL_REVISION is to be returned in the