Log warnings about files that would have been processed by disabled readers

pelican/tests/test_pelican.py

@@ -9,10 +9,11 @@ import unittest
 from collections.abc import Sequence
 from shutil import rmtree
 from tempfile import TemporaryDirectory, mkdtemp
-from unittest.mock import patch
+from unittest.mock import PropertyMock, patch
 
 from rich.console import Console
 
+import pelican.readers
 from pelican import Pelican, __version__, main
 from pelican.generators import StaticGenerator
 from pelican.settings import read_settings
@@ -303,3 +304,24 @@ class TestPelican(LoggedTestCase):
                     main(["-o", temp_dir, "pelican/tests/simple_content"])
             self.assertIn("Processed 1 article", out.getvalue())
             self.assertEqual("", err.getvalue())
+
+    def test_main_on_content_markdown_disabled(self):
+        """Invoke main on simple_content directory."""
+        with patch.object(
+            pelican.readers.MarkdownReader, "enabled", new_callable=PropertyMock
+        ) as attr_mock:
+            attr_mock.return_value = False
+            out, err = io.StringIO(), io.StringIO()
+            with contextlib.redirect_stdout(out), contextlib.redirect_stderr(err):
+                with TemporaryDirectory() as temp_dir:
+                    # Don't highlight anything.
+                    # See https://rich.readthedocs.io/en/stable/highlighting.html
+                    with patch("pelican.console", new=Console(highlight=False)):
+                        main(["-o", temp_dir, "pelican/tests/simple_content"])
+                self.assertIn("Processed 0 articles", out.getvalue())
+                self.assertLogCountEqual(
+                    1,
+                    ".*article_with_md_extension.md: "
+                    "Could not import markdown.Markdown.  "
+                    "Have you installed the markdown package?",
+                )