public int size() {
                return 20;
            }
        };
        qrList.allRecordCount = 41;
        qrList.calculatePageInfo();
        assertEquals(20, qrList.getPageSize());
        assertEquals(1, qrList.getCurrentPageNumber());
        assertEquals(41, qrList.getAllRecordCount());
        assertEquals(3, qrList.getAllPageCount());
        assertEquals(false, qrList.isExistPrevPage());