make the feed ID be a valid URL for compliance

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

incorporealcms/feed.py

@@ -32,7 +32,7 @@ def serve_feed(feed_type):
         abort(404)
 
     fg = FeedGenerator()
-    fg.id(f'{app.config["DOMAIN_NAME"]}')
+    fg.id(f'https://{app.config["DOMAIN_NAME"]}/')
     fg.title(f'{app.config["TITLE_SUFFIX"]}')
     fg.link(href=f'https://{app.config["DOMAIN_NAME"]}/feed/{feed_type}', rel='self')
     fg.link(href=f'https://{app.config["DOMAIN_NAME"]}', rel='alternate')

tests/test_feed.py

@@ -29,4 +29,5 @@ def test_rss_type_is_200(client):
 def test_feed_generator(app):
     """Test the root feed generator."""
     with app.test_request_context():
-        serve_feed('atom')
+        content = serve_feed('atom')
+    assert b'<id>https://example.com/</id>' in content