Add domain-wide blacklist and whitelist functionality

tests/test_whitelist.py

@@ -184,3 +184,33 @@ def test_regex_should_be_sent() -> None:
     assert should_be_sent(reader, first_entry[0]) is True, "Entry should be sent with newline-separated patterns"
     reader.delete_tag(feed, "regex_whitelist_author")
     assert should_be_sent(reader, first_entry[0]) is False, "Entry should not be sent"
+
+
+def test_domain_whitelist_should_be_sent() -> None:
+    """Domain-wide whitelist should apply to feeds on the same domain."""
+    reader: Reader = get_reader()
+
+    reader.add_feed(feed_url)
+    feed: Feed = reader.get_feed(feed_url)
+    reader.update_feeds()
+
+    entries: Iterable[Entry] = reader.get_entries(feed=feed)
+    first_entry: Entry | None = next(iter(entries), None)
+    assert first_entry is not None, "Expected at least one entry"
+
+    assert has_white_tags(reader, feed) is False, "Feed should not have whitelist tags"
+    assert should_be_sent(reader, first_entry) is False, "Entry should not be sent"
+
+    reader.set_tag(
+        (),
+        "domain_whitelist",
+        {
+            "lovinator.space": {
+                "whitelist_author": "TheLovinator",
+                "regex_whitelist_title": r"fvnnn\\w+",
+            },
+        },
+    )  # pyright: ignore[reportArgumentType]
+
+    assert has_white_tags(reader, feed) is True, "Domain whitelist should count as whitelist tags"
+    assert should_be_sent(reader, first_entry) is True, "Entry should be sent by domain whitelist"