http://example.com/no/anchor, branches: (None, []) http://example.com/an/anchor, branches: ('foo', []) http://example.com/no/anchor/branches, branches: (None, ['foo']) http://example.com/an/anchor/branches, branches: ('bar', ['foo']) http://example.com/an/anchor/branches-None, branches: ('foo', []) http://example.com/, branches: (None, []) http://example.com/, branches: (None, []) http://example.com/, branches: ('foo', [])