/**
  * Delete a department from database with the passed ID.
  */
 public static function delDepartment($departmentId)
 {
     $dept = new Department($departmentId);
     if ($dept->id == 0) {
         // Department wasn't loaded correctly
         NQ::simple('intern', INTERN_ERROR, "Error occurred while loading department from database.");
         return;
     }
     $name = $dept->getName();
     try {
         // Try to delete department.
         if (!$dept->delete()) {
             // Something bad happend. This should have been caught in the check above...
             NQ::simple('intern', INTERN_SUCCESS, "Error occurred deleting department from database.");
             return;
         }
     } catch (Exception $e) {
         NQ::simple('intern', INTERN_ERROR, $e->getMessage());
         return;
     }
     // Department deleted successfully.
     NQ::simple('intern', INTERN_SUCCESS, "Deleted department <i>{$name}</i>");
 }
 function test_delete()
 {
     //Arrange
     $name = "Biology";
     $address = "346 Stupid Avenue";
     $test_department = new Department($name, $address);
     $test_department->save();
     $name2 = "Chemiology";
     $address2 = "55 Bo Ct";
     $test_department2 = new Department($name2, $address2);
     $test_department2->save();
     //Act
     $test_department->delete();
     //Assert
     $result = Department::getAll();
     $this->assertEquals([$test_department2], $result);
 }