cached result backend

first version of a result backend using django's cache framework

django_q/tests/test_cached.py

@@ -0,0 +1,52 @@
+from multiprocessing import Event
+
+import pytest
+
+from django_q.cluster import Sentinel
+from django_q.conf import Conf
+from django_q.tasks import async, result, fetch, count_group, result_group, fetch_group, delete_group
+from django_q.brokers import get_broker
+
+
+@pytest.fixture
+def broker():
+    Conf.DISQUE_NODES = None
+    Conf.IRON_MQ = None
+    Conf.SQS = None
+    Conf.ORM = None
+    Conf.MONGO = None
+    Conf.DJANGO_REDIS = 'default'
+    return get_broker()
+
+
+@pytest.mark.django_db
+def test_cached(broker):
+    broker.purge_queue()
+    broker.cache.clear()
+    group = 'cache_test'
+    # queue the tests
+    task_id = async('math.copysign', 1, -1, cached=True, broker=broker)
+    async('math.copysign', 1, -1, cached=True, broker=broker, group=group)
+    async('math.copysign', 1, -1, cached=True, broker=broker, group=group)
+    async('math.copysign', 1, -1, cached=True, broker=broker, group=group)
+    async('math.copysign', 1, -1, cached=True, broker=broker, group=group)
+    async('math.copysign', 1, -1, cached=True, broker=broker, group=group)
+    # run a single cluster
+    start_event = Event()
+    stop_event = Event()
+    stop_event.set()
+    Sentinel(stop_event, start_event, broker=broker)
+    # assert results
+    assert result(task_id, wait=500, cached=True) == -1
+    assert fetch(task_id,wait=500, cached=True).result == -1
+    # make sure it's not in the db backend
+    assert fetch(task_id) is None
+    # assert group
+    assert count_group(group, cached=True) == 5
+    assert count_group(group, cached=True, failures=True) == 0
+    assert result_group(group, cached=True) == [-1, -1, -1, -1, -1]
+    assert len(fetch_group(group, cached=True)) == 5
+    assert len(fetch_group(group, cached=True, failures=False)) == 5
+    delete_group(group, cached=True)
+    assert count_group(group, cached=True) is None
+    broker.cache.clear()