Fix bug in locative logic

homeassistant/components/device_tracker/locative.py

@@ -49,10 +49,9 @@ def _handle_get_api_locative(hass, see, handler, path_match, data):
         handler.write_text("Setting location to {}".format(location_name))
 
     elif direction == 'exit':
-        current_state = hass.states.get(
+        current_state = hass.states.get("{}.{}".format(DOMAIN, device))
-            "{}.{}".format(DOMAIN, device)).state
 
-        if current_state == location_name:
+        if current_state is None or current_state.state == location_name:
             see(dev_id=device, location_name=STATE_NOT_HOME)
             handler.write_text("Setting location to not home")
         else:

tests/components/device_tracker/test_locative.py

@@ -203,3 +203,21 @@ class TestLocative(unittest.TestCase):
 
         state = hass.states.get('{}.{}'.format('device_tracker', data['device']))
         self.assertEqual(state.state, 'work')
+
+    def test_exit_first(self, update_config):
+        """ Test when an exit message is sent first on a new device """
+
+        data = {
+            'latitude': 40.7855,
+            'longitude': -111.7367,
+            'device': 'new_device',
+            'id': 'Home',
+            'trigger': 'exit'
+        }
+
+        # Exit Home
+        req = requests.get(_url(data))
+        self.assertEqual(200, req.status_code)
+
+        state = hass.states.get('{}.{}'.format('device_tracker', data['device']))
+        self.assertEqual(state.state, 'not_home')