def test_make_tree(self):
        """Test make_tree method."""
        node = self.vgw.make_tree(self.root.id, '/a/b/c')
        self.assertEqual(node.full_path, '/a/b/c')
        node = self.vgw.make_tree(self.root.id, '/')
        self.assertEqual(node.id, self.root.id)