def test_get_external_source_fail(self, external_system):
     external_system.get = MagicMock(return_value="ePMA")
     with self.assertRaises(ValueError):
         gloss_api.get_external_source("Appointment")
 def test_get_external_source(self, external_system):
     external_system.get = MagicMock(return_value="ePMA")
     self.assertEqual(gloss_api.get_external_source("demographics"), "ePMA")