assertEquals(0, charmappingpager.getAllPageCount());
        assertEquals(false, charmappingpager.isExistPrePage());
        assertEquals(false, charmappingpager.isExistNextPage());
        assertEquals(25, charmappingpager.getPageSize());
        assertEquals(1, charmappingpager.getCurrentPageNumber());
        assertNull(charmappingpager.id);

        assertEquals(0, accesstokenpager.getAllPageCount());
        assertEquals(false, accesstokenpager.isExistPrePage());
        assertEquals(false, accesstokenpager.isExistNextPage());
        assertEquals(25, accesstokenpager.getPageSize());
        assertEquals(1, accesstokenpager.getCurrentPageNumber());
        assertNull(accesstokenpager.id);
        assertNull(accesstokenpager.name);

        assertEquals(0, badwordpager.getAllRecordCount());
        assertEquals(0, badwordpager.getAllPageCount());
        assertEquals(false, badwordpager.isExistPrePage());
        assertEquals(false, badwordpager.isExistNextPage());
        assertEquals(25, badwordpager.getPageSize());
        assertEquals(1, badwordpager.getCurrentPageNumber());
        assertNull(badwordpager.id);
        assertNull(badwordpager.suggestWord);

        assertFalse(searchRenderData.isExistNextPage());

        // Test with true
        searchRenderData.setExistNextPage(true);
        assertTrue(searchRenderData.isExistNextPage());

        // Toggle back to false
        searchRenderData.setExistNextPage(false);
        assertFalse(searchRenderData.isExistNextPage());
    }

    public void test_setAndIsExistPrevPage() {

        assertEquals(0, dataconfigpager.getAllRecordCount());
        assertEquals(0, dataconfigpager.getAllPageCount());
        assertEquals(false, dataconfigpager.isExistPrePage());
        assertEquals(false, dataconfigpager.isExistNextPage());
        assertEquals(25, dataconfigpager.getPageSize());
        assertEquals(1, dataconfigpager.getCurrentPageNumber());
        assertNull(dataconfigpager.id);
        assertNull(dataconfigpager.name);

        assertEquals(0, qrList.getAllRecordCount());
        assertEquals(1, qrList.getAllPageCount());
        assertEquals(false, qrList.isExistPrevPage());
        assertEquals(false, qrList.isExistNextPage());
        assertEquals(0, qrList.getCurrentStartRecordNumber());
        assertEquals(0, qrList.getCurrentEndRecordNumber());
    }

    public void test_calculatePageInfo_page1() {
        QueryResponseList qrList;

        assertEquals(0, boostdocpager.getAllRecordCount());
        assertEquals(0, boostdocpager.getAllPageCount());
        assertEquals(false, boostdocpager.isExistPrePage());
        assertEquals(false, boostdocpager.isExistNextPage());
        assertEquals(25, boostdocpager.getPageSize());
        assertEquals(1, boostdocpager.getCurrentPageNumber());
        assertNull(boostdocpager.id);
        assertNull(boostdocpager.urlExpr);

        assertEquals(0, crawlinginfopage.getAllPageCount());
        assertEquals(false, crawlinginfopage.isExistPrePage());
        assertEquals(false, crawlinginfopage.isExistNextPage());
        assertEquals(25, crawlinginfopage.getPageSize());
        assertEquals(1, crawlinginfopage.getCurrentPageNumber());
        assertNull(crawlinginfopage.id);
        assertNull(crawlinginfopage.sessionId);

        assertEquals(0, duplicatehostpager.getAllPageCount());
        assertEquals(false, duplicatehostpager.isExistPrePage());
        assertEquals(false, duplicatehostpager.isExistNextPage());
        assertEquals(25, duplicatehostpager.getPageSize());
        assertEquals(1, duplicatehostpager.getCurrentPageNumber());
        assertNull(duplicatehostpager.id);

        this.existPrePage = existPrePage;
    }

    /**
     * Returns true if a next page exists.
     *
     * @return True if a next page exists.
     */
    public boolean isExistNextPage() {
        return existNextPage;
    }

    /**
     * Sets whether a next page exists.
     *
     * @param existNextPage True if a next page exists.
     */