chore: add tests for per-page rss.feed_description

Author: meysam81

tests/fixtures/docs/page_with_meta_override_rss_description.md

@@ -0,0 +1,19 @@
+---
+title: Page with overridden rss feed description
+authors:
+  - Guts
+  - Tim Vink
+  - liang2kl
+date: 2020-03-20 10:20
+update: 2022-03-30 10:20
+description: First test page of mkdocs-rss-plugin test suite
+image: "https://svgsilh.com/png-512/97849.png"
+rss:
+  feed_description: This is a custom override of the feed description
+tags:
+  - test
+---
+
+# Test page with meta
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

tests/test_build.py

@@ -679,6 +679,40 @@ def test_simple_build_custom_title_description(self):
             self.assertEqual(feed_parsed.feed.title, "My custom RSS title")
             self.assertEqual(feed_parsed.feed.description, "My custom RSS description")
 
+    def test_simple_build_override_per_page_rss_feed_description(self):
+        """
+        Test per-page rss.feed_description overrides the config  site_description and rss.feed_description
+
+        How to run this test:
+            pytest tests/test_build.py::TestBuildRss::test_simple_build_override_per_page_rss_feed_description
+        """
+        with tempfile.TemporaryDirectory() as tmpdirname:
+            cli_result = self.build_docs_setup(
+                testproject_path="docs",
+                mkdocs_yml_filepath=Path(
+                    "tests/fixtures/mkdocs_custom_title_description.yml"
+                ),
+                output_path=tmpdirname,
+            )
+            if cli_result.exception is not None:
+                e = cli_result.exception
+                logger.debug(format_exception(type(e), e, e.__traceback__))
+
+            self.assertEqual(cli_result.exit_code, 0)
+            self.assertIsNone(cli_result.exception)
+
+            # created items
+            feed_parsed = feedparser.parse(Path(tmpdirname) / OUTPUT_RSS_FEED_CREATED)
+            for feed_item in feed_parsed.entries:
+                if feed_item.title == "Page with overridden rss feed description":
+                    self.assertEqual(
+                        feed_item.description,
+                        "This is a custom override of the feed description",
+                    )
+                    break
+            else:
+                self.fail("Page with overridden rss feed description not found")
+
     def test_rss_feed_validation(self):
         with tempfile.TemporaryDirectory() as tmpdirname:
             cli_result = self.build_docs_setup(