def METHOD_NAME(self):
    inp = (u'index.markdown\n'
           '\tsection.markdown\n'
           '\t\tsubsection.markdown')
    sitemap = self.parse(inp)
    all_sources = sitemap.get_all_sources()
    self.assertEqual(len(all_sources), 3)
    self.assertEqual(all_sources['index.markdown'],
                     ['section.markdown'])
    self.assertEqual(all_sources['section.markdown'],
                     ['subsection.markdown'])