Add very basic test for stats worker

workers/globalpromstats/test/test_globalpromstats.py

@@ -0,0 +1,15 @@
+from mock import patch, Mock
+
+from workers.globalpromstats.globalpromstats import GlobalPrometheusStatsWorker
+
+from test.fixtures import *
+
+def test_reportstats(initialized_db):
+  mock = Mock()
+  with patch('workers.globalpromstats.globalpromstats.metric_queue', mock):
+    worker = GlobalPrometheusStatsWorker()
+    worker._report_stats()
+
+  mock.repository_count.Set.assert_called_once()
+  mock.org_count.Set.assert_called_once()
+  mock.robot_count.Set.assert_called_once()