fix: clarify stale release token recovery (#37)

tests/test_release_engine.py

@@ -1,4 +1,6 @@
 import json
+import threading
+from http.server import BaseHTTPRequestHandler, HTTPServer
 from pathlib import Path
 
 import pytest
@@ -6,6 +8,7 @@ import pytest
 from src.release_engine import (
     CommandResult,
     EngineConfig,
+    GiteaClient,
     Issue,
     ReleaseEngine,
     RunState,
@@ -15,6 +18,28 @@ from src.release_engine import (
 )
 
 
+def test_stale_token_error_explains_how_to_restore_cron_authentication():
+    class UnauthorizedHandler(BaseHTTPRequestHandler):
+        def do_GET(self):
+            self.send_response(401)
+            self.end_headers()
+            self.wfile.write(b'{"message":"user does not exist [uid: 0, name: ]"}')
+
+        def log_message(self, format, *args):
+            pass
+
+    server = HTTPServer(("127.0.0.1", 0), UnauthorizedHandler)
+    thread = threading.Thread(target=server.handle_request)
+    thread.start()
+    try:
+        client = GiteaClient(f"http://127.0.0.1:{server.server_port}", "stale-token")
+        with pytest.raises(RuntimeError, match="refresh the cron GITEA_TOKEN"):
+            client.list_open_issues("stackchain/stackchain-dashboard")
+    finally:
+        thread.join(timeout=2)
+        server.server_close()
+
+
 class FakeClient:
     def __init__(self, issues, verified_assignee="timmy", existing_pr=None):
         self.issues = issues