Remove initialisation warning from the boiler

tests/test_boilerclimate.py

@@ -467,16 +467,31 @@ class WatchdogTests(unittest.TestCase):
         a = object.__new__(BoilerWatchdog)
         a.base, a.mqtt_namespace, a.timeout = 'appdaemon/test', 'mqtt', 180
         a.last_heartbeat, a.fault = None, False
+        a.waiting_since, a.warned = 1000, False
         a.call_service, a.log = Mock(), Mock()
         a.initialize_logger_interface(a, ascii_encode=False)
         return a
 
     def test_missing_heartbeat_publishes_offline_once(self):
         a = self.app()
-        a._check()
-        a._check()
+        with patch('boilerwatchdog.time.monotonic', return_value=1000):
+            a._check()
+            a._check()
         a.call_service.assert_called_once_with('mqtt/publish', namespace='mqtt',
                                               topic=a.base + '/availability', payload='offline', qos=0, retain=True)
+        a.log.assert_not_called()
+        a._mqtt_event('', {'topic': a.base + '/heartbeat'}, {})
+        a.log.assert_not_called()
+
+    def test_first_heartbeat_missing_beyond_timeout_warns_once(self):
+        a = self.app()
+        with patch('boilerwatchdog.time.monotonic', return_value=1000):
+            a._check()
+        with patch('boilerwatchdog.time.monotonic', return_value=1180):
+            a._check()
+            a._check()
+        self.assertEqual(a.log.call_count, 1)
+        self.assertEqual(a.log.call_args.kwargs['level'], 'WARNING')
 
     def test_timeout_and_recovery_do_not_override_sensor_availability(self):
         a = self.app()
@@ -488,6 +503,7 @@ class WatchdogTests(unittest.TestCase):
         with patch('boilerwatchdog.time.monotonic', return_value=1180):
             a._check()
         self.assertTrue(a.fault)
+        self.assertTrue(a.warned)
         a.call_service.reset_mock()
         a._mqtt_event('', {'topic': a.base + '/heartbeat'}, {})
         self.assertFalse(a.fault)
@@ -500,6 +516,7 @@ class WatchdogTests(unittest.TestCase):
         self.assertIsNone(a.last_heartbeat)
         self.assertTrue(a.fault)
         self.assertEqual(a.call_service.call_args.kwargs['payload'], 'offline')
+        a.log.assert_not_called()
 
 
 if __name__ == '__main__':