L2SS-480: Do patch DeviceProxy in lofar_base_device as well

tangostationcontrol/tangostationcontrol/test/devices/test_beam_device.py

@@ -9,8 +9,9 @@
 
 from tango import DevState
 from tango.test_context import DeviceTestContext
+import tango
 
-from tangostationcontrol.devices import beam
+from tangostationcontrol.devices import beam, lofar_device
 
 import numpy
 import mock
@@ -25,10 +26,11 @@ class TestBeamDevice(base.TestCase):
 
         # Patch DeviceProxy to allow making the proxies during initialisation
         # that we otherwise avoid using
-        proxy_patcher = mock.patch.object(
-            beam, 'DeviceProxy')
-        self.m_init = proxy_patcher.start()
-        self.addCleanup(proxy_patcher.stop)
+        for device in [beam, lofar_device]:
+            proxy_patcher = mock.patch.object(
+                device, 'DeviceProxy')
+            proxy_patcher.start()
+            self.addCleanup(proxy_patcher.stop)
     
     def test_get_pointing_directions(self):
         """Verify can read pointings attribute and length matches without err"""