public void REMOVE_DRIVER_DECREASE_ITEMS_COUNT() { _service.CreateDriver(_mockDriver); _service.CreateDriver(_mockDriver); var countBeforeRemove = _service.GetDrivers().Count; _service.DeleteDriver(_mockDriver.DriverId.ToString()); var countAfterRemove = _service.GetDrivers().Count; Assert.IsTrue(countAfterRemove == countBeforeRemove - 1, "countAfterRemove == countBeforeRemove"); _service.ClearDrivers(); }