Добавить основную функциональность загрузки YouTube Shorts с использованием файла сессии и обработкой ошибок

tests/test_session.py

@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from yt_shorts_downloader.session import validate_session_file
+
+
+def test_validate_session_file_accepts_valid_youtube_session(tmp_path: Path) -> None:
+    session_file = tmp_path / "cookies.txt"
+    session_file.write_text(
+        "\n".join(
+            [
+                "# Netscape HTTP Cookie File",
+                ".youtube.com\tTRUE\t/\tFALSE\t9999999999\tSID\tvalue1",
+                ".youtube.com\tTRUE\t/\tTRUE\t9999999999\tSAPISID\tvalue2",
+                ".youtube.com\tTRUE\t/\tTRUE\t9999999999\tLOGIN_INFO\tvalue3",
+            ]
+        ),
+        encoding="utf-8",
+    )
+
+    validation = validate_session_file(session_file)
+
+    assert validation.exists is True
+    assert validation.structurally_valid is True
+    assert validation.fresh is True
+    assert validation.is_usable is True
+
+
+def test_validate_session_file_rejects_invalid_format(tmp_path: Path) -> None:
+    session_file = tmp_path / "cookies.txt"
+    session_file.write_text("broken\trow", encoding="utf-8")
+
+    validation = validate_session_file(session_file)
+
+    assert validation.exists is True
+    assert validation.structurally_valid is False
+    assert validation.is_usable is False