assertEquals(0, groupPager.getAllPageCount());
        assertFalse(groupPager.isExistPrePage());
        assertFalse(groupPager.isExistNextPage());
    }

    public void test_defaultValues() {
        GroupPager groupPager = new GroupPager();
        assertEquals(GroupPager.DEFAULT_PAGE_SIZE, 20);
        assertEquals(GroupPager.DEFAULT_CURRENT_PAGE_NUMBER, 1);
    }

        assertEquals(0, rolePager.getAllPageCount());
        assertFalse(rolePager.isExistPrePage());
        assertFalse(rolePager.isExistNextPage());
    }

    public void test_defaultValues() {
        RolePager rolePager = new RolePager();
        assertEquals(RolePager.DEFAULT_PAGE_SIZE, 20);
        assertEquals(RolePager.DEFAULT_CURRENT_PAGE_NUMBER, 1);
    }

        assertEquals(0, userPager.getAllPageCount());
        assertFalse(userPager.isExistPrePage());
        assertFalse(userPager.isExistNextPage());
    }

    public void test_defaultValues() {
        assertEquals(20, UserPager.DEFAULT_PAGE_SIZE);
        assertEquals(1, UserPager.DEFAULT_CURRENT_PAGE_NUMBER);
    }