Add initial Restreamer implementation for YouTube-to-Jellyfin live restreaming

tests/test_resolver.py

@@ -0,0 +1,23 @@
+from datetime import UTC, datetime
+
+from restreamer.resolver import parse_expiry_from_url
+
+
+def test_parse_expiry_from_url_reads_expire_param() -> None:
+    url = "https://r.googlevideo.com/videoplayback?id=abc&expire=1700000000&itag=96"
+
+    result = parse_expiry_from_url(url)
+
+    assert result == datetime.fromtimestamp(1700000000, tz=UTC)
+
+
+def test_parse_expiry_from_url_returns_none_without_param() -> None:
+    url = "https://example.com/stream.m3u8?token=abc"
+
+    assert parse_expiry_from_url(url) is None
+
+
+def test_parse_expiry_from_url_ignores_non_numeric_value() -> None:
+    url = "https://example.com/stream.m3u8?expire=not-a-number"
+
+    assert parse_expiry_from_url(url) is None