Retry rate-limited HLS segments

test_app.py

@@ -8,6 +8,7 @@ import sys
 import tempfile
 import threading
 import unittest
+import urllib.error
 from http import HTTPStatus
 from pathlib import Path
 from unittest import mock
@@ -4356,6 +4357,33 @@ seg-3.ts
             )
         )
 
+    def test_fetch_bytes_with_retries_recovers_from_segment_rate_limit(self):
+        error = urllib.error.HTTPError(
+            "https://cdn.example/video/raw-segment",
+            429,
+            "Too Many Requests",
+            hdrs={},
+            fp=None,
+        )
+
+        try:
+            with mock.patch.object(
+                provider_downloader,
+                "fetch_bytes",
+                side_effect=[error, b"video"],
+            ) as fetch_bytes, mock.patch.object(provider_downloader.time, "sleep") as sleep:
+                data = provider_downloader.fetch_bytes_with_retries(
+                    "https://cdn.example/video/raw-segment",
+                    retries=1,
+                    retry_label="segment",
+                )
+        finally:
+            error.close()
+
+        self.assertEqual(data, b"video")
+        self.assertEqual(fetch_bytes.call_count, 2)
+        sleep.assert_called_once()
+
 
 class DockerfilePackagingTests(unittest.TestCase):
     def test_provider_updates_module_is_copied_into_image(self):