@Test
 public void shouldUnAssingPatientFromBed() throws Exception {
   PatientService patientService = Context.getPatientService();
   Patient patient = patientService.getPatient(4);
   BedDetails bedDetails = bedManagementService.getBedAssignmentDetailsByPatient(patient);
   assertEquals(Integer.valueOf(12), bedDetails.getBed().getId());
   BedDetails unAssignedBed = bedManagementService.unAssignPatientFromBed(patient);
   assertEquals(Integer.valueOf(12), unAssignedBed.getBed().getId());
   bedDetails = bedManagementService.getBedAssignmentDetailsByPatient(patient);
   assertNull(bedDetails);
 }