Adds timeout and reincarnation test

Also found a bug because of this.

django_q/tests/tasks.py

@@ -1,4 +1,7 @@
 # simple countdown, returns nothing
+from time import sleep
+
+
 def countdown(n):
     while n > 0:
         n -= 1
@@ -23,6 +26,11 @@ def word_multiply(x, word=''):
     return len(word) * x
 
 
+def count_forever():
+    while True:
+        sleep(0.5)
+
+
 def get_task_name(task):
     return task.name
 

django_q/tests/test_cluster.py

@@ -1,6 +1,8 @@
 import sys
 import os
 from multiprocessing import Queue, Event, Value
+import threading
+from time import sleep
 
 import pytest
 
@@ -181,6 +183,20 @@ def test_async(r):
     assert result(h) == 12
     r.delete(list_key)
 
+@pytest.mark.django_db
+def test_timeout(r):
+    # set up the Sentinel
+    list_key = 'timeout_test:q'
+    async('django_q.tests.tasks.count_forever', list_key=list_key)
+    start_event = Event()
+    stop_event = Event()
+    # Set a timer to stop the Sentinel
+    threading.Timer(3, stop_event.set).start()
+    s = Sentinel(stop_event, start_event, list_key=list_key, timeout=1)
+    assert start_event.is_set()
+    assert s.status() == Conf.STOPPED
+    assert s.reincarnations == 1
+
 
 @pytest.mark.django_db
 def assert_result(task):