Add test for error case publishing markdown-with-index

doorstop/cli/tests/test_all.py

@@ -815,13 +815,19 @@ def test_publish_tree_no_path(self):
         self.assertRaises(SystemExit, main, ["publish", "all"])
 
     def test_publish_tree_markdown_with_index(self):
+        """Verify 'doorstop publish' can create Markdown output for a tree,
+        with an index."""
+        path = tempfile.mkdtemp()
+        os.remove(path)
+        self.assertRaises(SystemExit, main(["publish", "all", path, "--markdown", "--index"]))
+
+    def test_publish_tree_markdown_with_index_no_tree(self):
         """Verify 'doorstop publish' can create Markdown output for a tree,
         with an index."""
         path = os.path.join(self.temp, "all")
         self.assertIs(None, main(["publish", "all", path, "--markdown", "--index"]))
         self.assertTrue(os.path.isdir(path))
-        self.assertFalse(os.path.isfile(os.path.join(path, "index.html")))
-
+        self.assertFalse(os.path.isfile(os.path.j
 
 
 class TestPublishCommand(TempTestCase):