def METHOD_NAME(self):
    sg = self._sequence_generator()
    update_value = next(sg)
    self.sheet.update_acell("A1", update_value)
    cell = self.sheet.acell("A1")
    self.assertEqual(cell.value, update_value)
    self.assertEqual(cell.row, 1)
    self.assertEqual(cell.col, 1)