def check(self):
    if not self.map[-3] < self.map[-1]:
      print self
      assert 0
This tests for an issue where if a site root page was moved, all
dataset/ETHPy150Open probcomp/bayeslite/external/plex/dist/Plex/Transitions.py/TransitionMap.check--crossover with--dataset/ETHPy150Open torchbox/wagtail/wagtail/wagtailcore/tests/tests.py/TestSiteRootPathsCache.test_cache_clears_when_site_root_moves