fix(events): keep registration status reads nonblocking

config/tests/unit/test_api_errors.py

@@ -0,0 +1,35 @@
+import json
+
+import pytest
+from django.db import OperationalError
+
+from config.api_errors import handle_database_operational_error
+
+pytestmark = pytest.mark.unit
+
+
+class PostgresError(Exception):
+    def __init__(self, sqlstate):
+        super().__init__(sqlstate)
+        self.sqlstate = sqlstate
+
+
+def test_database_lock_timeout_returns_retryable_service_unavailable():
+    error = OperationalError("canceling statement due to lock timeout")
+    error.__cause__ = PostgresError("55P03")
+
+    response = handle_database_operational_error(None, error)
+
+    assert response.status_code == 503
+    assert response["Retry-After"] == "2"
+    assert json.loads(response.content) == {
+        "detail": "درخواست به‌دلیل شلوغی موقت پایگاه داده انجام نشد؛ کمی بعد دوباره تلاش کنید."
+    }
+
+
+def test_unrelated_database_operational_error_is_not_hidden():
+    error = OperationalError("database unavailable")
+    error.__cause__ = PostgresError("08006")
+
+    with pytest.raises(OperationalError, match="database unavailable"):
+        handle_database_operational_error(None, error)