Fix serialization error when TB is installed but not configured

taskbadger/celery.py

@@ -102,15 +102,18 @@ def scrape_urls(self, urls):
 
     def apply_async(self, *args, **kwargs):
         headers = kwargs.setdefault("headers", {})
-        headers["taskbadger_track"] = True
         tb_kwargs = self._get_tb_kwargs(kwargs)
         if kwargs.get("kwargs"):
             # extract taskbadger options from task kwargs when supplied as keyword argument
             tb_kwargs.update(self._get_tb_kwargs(kwargs["kwargs"]))
         elif len(args) > 1 and isinstance(args[1], dict):
             # extract taskbadger options from task kwargs when supplied as positional argument
             tb_kwargs.update(self._get_tb_kwargs(args[1]))
-        headers[TB_KWARGS_ARG] = tb_kwargs
+
+        if Badger.is_configured():
+            headers["taskbadger_track"] = True
+            headers[TB_KWARGS_ARG] = tb_kwargs
+
         result = super().apply_async(*args, **kwargs)
 
         tb_task_id = result.info.get(TB_TASK_ID) if result.info else None
@@ -150,13 +153,13 @@ def taskbadger_task(self):
 @before_task_publish.connect
 def task_publish_handler(sender=None, headers=None, body=None, **kwargs):
     headers = headers if "task" in headers else body
+    header_kwargs = headers.pop(TB_KWARGS_ARG, {})  # always remove TB headers
     if sender.startswith("celery.") or not Badger.is_configured():
         return
 
     celery_system = Badger.current.settings.get_system_by_id("celery")
     auto_track = celery_system and celery_system.track_task(sender)
     manual_track = headers.get("taskbadger_track")
-    header_kwargs = headers.pop(TB_KWARGS_ARG, {})
     if not manual_track and not auto_track:
         return
 

tests/test_celery.py

@@ -171,7 +171,14 @@ def add_no_tb(self, a, b):
     with mock.patch("taskbadger.celery.create_task_safe") as create, mock.patch(
         "taskbadger.celery.update_task_safe"
     ) as update:
-        result = add_no_tb.delay(2, 2)
+        result = add_no_tb.delay(
+            2,
+            2,
+            taskbadger_kwargs={
+                # add an action here to test serialization failure when Badger is not configured
+                "actions": [Action("stale", integration=EmailIntegration(to="test@test.com"))]
+            },
+        )
         assert result.get(timeout=10, propagate=True) == 4
 
     create.assert_not_called()

tests/test_session.py

@@ -71,6 +71,8 @@ def test_session_multiple_threads():
 
 
 class TestThread(threading.Thread):
+    __test__ = False
+
     def __init__(self, name, barrier, clients):
         threading.Thread.__init__(self, name=name)
         self.barrier = barrier