Initial commit

tests/test_merge.py

@@ -0,0 +1,50 @@
+from datetime import datetime, timezone
+from pathlib import Path
+import sys
+import unittest
+import xml.etree.ElementTree as ET
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from merge import FeedItem, build_rss, sort_and_limit
+
+
+def item(title, link, hour, description=""):
+    return FeedItem(
+        title=title,
+        link=link,
+        guid=link,
+        published=datetime(2026, 1, 1, hour, tzinfo=timezone.utc),
+        description=description,
+        source_title="Test Feed",
+        source_url="https://example.com/feed.xml",
+    )
+
+
+class MergeTests(unittest.TestCase):
+    def test_sorts_keeps_duplicates_and_limits(self):
+        values = [
+            item("Older", "https://example.com/old", 1),
+            item("Newest", "https://example.com/new", 3),
+            item("Duplicate title", "https://example.com/new#comments", 2),
+        ]
+        merged = sort_and_limit(values, 2)
+        self.assertEqual([value.title for value in merged], ["Newest", "Duplicate title"])
+
+    def test_builds_valid_rss(self):
+        group = {
+            "title": "Merged",
+            "sources": ["https://example.com/feed.xml"],
+            "self_url": "https://example.com/all.xml",
+        }
+        document = build_rss("all", group, [item("Hello", "https://example.com/hello", 1, "<p>Body</p>")])
+        root = ET.fromstring(document)
+        self.assertEqual(root.tag, "rss")
+        self.assertEqual(root.findtext("channel/title"), "Merged")
+        self.assertEqual(root.findtext("channel/item/title"), "Hello")
+        self.assertEqual(root.findtext("channel/item/description"), "<p>Body</p>")
+        self.assertEqual(root.find("channel/item/source").get("url"), "https://example.com/feed.xml")
+
+
+if __name__ == "__main__":
+    unittest.main()