@Test
public void noItems() {
pg.setItems(0);
pg.setPage(1);
assertEquals(0, pg.getPages());
assertEquals(10, pg.getItemsPerPage());
assertEquals(0, pg.getPage());
assertEquals(0, pg.getFirstPage());
assertEquals(0, pg.getPreviousPage());
assertEquals(0, pg.getPreviousPage(10));
assertEquals(0, pg.getNextPage());
assertEquals(0, pg.getNextPage(10));
assertEquals(0, pg.getBeginIndex());
assertEquals(0, pg.getEndIndex());
assertEquals(0, pg.getOffset());
assertEquals(0, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertTrue(pg.isDisabledPage(1));
assertTrue(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(21));
assertTrue(pg.isDisabledPage(22));
assertTrue(pg.isDisabledPage(26));
}
@Test
public void setItems() {
pg.setItems(123);
pg.setPage(11);
pg.setItems(133); // 改变items
assertEquals(14, pg.getPages());
assertEquals(133, pg.getItems());
assertEquals(10, pg.getItemsPerPage());
assertEquals(11, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(10, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(12, pg.getNextPage());
assertEquals(14, pg.getNextPage(10));
assertEquals(101, pg.getBeginIndex());
assertEquals(110, pg.getEndIndex());
assertEquals(100, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(11));
assertFalse(pg.isDisabledPage(13));
assertFalse(pg.isDisabledPage(14));
assertTrue(pg.isDisabledPage(15));
}
@Test
public void setItemsPerPage() {
pg.setItems(123);
pg.setPage(11);
// 变大itemsPerPage
pg.setItemsPerPage(20);
assertEquals(7, pg.getPages());
assertEquals(123, pg.getItems());
assertEquals(20, pg.getItemsPerPage());
assertEquals(6, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(5, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(7, pg.getNextPage());
assertEquals(7, pg.getNextPage(10));
assertEquals(101, pg.getBeginIndex());
assertEquals(120, pg.getEndIndex());
assertEquals(100, pg.getOffset());
assertEquals(20, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(6));
assertFalse(pg.isDisabledPage(7));
assertTrue(pg.isDisabledPage(8));
// 变小itemsPerPage
pg.setItemsPerPage(5);
assertEquals(25, pg.getPages());
assertEquals(123, pg.getItems());
assertEquals(5, pg.getItemsPerPage());
assertEquals(21, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(20, pg.getPreviousPage());
assertEquals(11, pg.getPreviousPage(10));
assertEquals(22, pg.getNextPage());
assertEquals(25, pg.getNextPage(10));
assertEquals(101, pg.getBeginIndex());
assertEquals(105, pg.getEndIndex());
assertEquals(100, pg.getOffset());
assertEquals(5, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(21));
assertFalse(pg.isDisabledPage(22));
assertTrue(pg.isDisabledPage(26));
}
@Test
public void setItem() {
pg.setItems(123);
// 13页
pg.setItem(122);
assertEquals(13, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(12, pg.getPreviousPage());
assertEquals(3, pg.getPreviousPage(10));
assertEquals(13, pg.getNextPage());
assertEquals(13, pg.getNextPage(10));
assertEquals(121, pg.getBeginIndex());
assertEquals(123, pg.getEndIndex());
assertEquals(120, pg.getOffset());
assertEquals(3, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertFalse(pg.isDisabledPage(11));
assertTrue(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
// 1页
pg.setItem(0);
assertEquals(1, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(1, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(2, pg.getNextPage());
assertEquals(11, pg.getNextPage(10));
assertEquals(13, pg.getLastPage());
assertEquals(1, pg.getBeginIndex());
assertEquals(10, pg.getEndIndex());
assertEquals(0, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertTrue(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertFalse(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
}
/** 测试无限多项。 */
@Test
public void unknownItems() {
assertEquals(Paginator.UNKNOWN_ITEMS, pg.getItems());
assertEquals(10, pg.getItemsPerPage());
// 初始状态，第1页
assertEquals(1, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(1, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(2, pg.getNextPage());
assertEquals(11, pg.getNextPage(10));
assertEquals(1, pg.getBeginIndex());
assertEquals(10, pg.getEndIndex());
assertEquals(0, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertTrue(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
// 下一页，第2页
pg.setPage(2);
assertEquals(2, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(1, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(3, pg.getNextPage());
assertEquals(12, pg.getNextPage(10));
assertEquals(11, pg.getBeginIndex());
assertEquals(20, pg.getEndIndex());
assertEquals(10, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertTrue(pg.isDisabledPage(2));
// 第11页
pg.setPage(11);
assertEquals(11, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(10, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(12, pg.getNextPage());
assertEquals(21, pg.getNextPage(10));
assertEquals(101, pg.getBeginIndex());
assertEquals(110, pg.getEndIndex());
assertEquals(100, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(11));
assertFalse(pg.isDisabledPage(12));
}
/** 测试有限多项。 */
@Test
public void limitedItems() {
pg.setItems(123);
assertEquals(13, pg.getPages());
assertEquals(123, pg.getItems());
assertEquals(10, pg.getItemsPerPage());
// 初始状态，第1页
assertEquals(1, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(1, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(2, pg.getNextPage());
assertEquals(11, pg.getNextPage(10));
assertEquals(13, pg.getLastPage());
assertEquals(1, pg.getBeginIndex());
assertEquals(10, pg.getEndIndex());
assertEquals(0, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertTrue(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertFalse(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
// 下一页，第2页
pg.setPage(2);
assertEquals(2, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(1, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(3, pg.getNextPage());
assertEquals(12, pg.getNextPage(10));
assertEquals(11, pg.getBeginIndex());
assertEquals(20, pg.getEndIndex());
assertEquals(10, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertTrue(pg.isDisabledPage(2));
assertFalse(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
// 第11页
pg.setPage(11);
assertEquals(11, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(10, pg.getPreviousPage());
assertEquals(1, pg.getPreviousPage(10));
assertEquals(12, pg.getNextPage());
assertEquals(13, pg.getNextPage(10));
assertEquals(101, pg.getBeginIndex());
assertEquals(110, pg.getEndIndex());
assertEquals(100, pg.getOffset());
assertEquals(10, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertTrue(pg.isDisabledPage(11));
assertFalse(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
// 第13页（最后一页）
pg.setPage(13);
assertEquals(13, pg.getPage());
assertEquals(1, pg.getFirstPage());
assertEquals(12, pg.getPreviousPage());
assertEquals(3, pg.getPreviousPage(10));
assertEquals(13, pg.getNextPage());
assertEquals(13, pg.getNextPage(10));
assertEquals(121, pg.getBeginIndex());
assertEquals(123, pg.getEndIndex());
assertEquals(120, pg.getOffset());
assertEquals(3, pg.getLength());
assertTrue(pg.isDisabledPage(0));
assertFalse(pg.isDisabledPage(1));
assertFalse(pg.isDisabledPage(2));
assertFalse(pg.isDisabledPage(11));
assertTrue(pg.isDisabledPage(13));
assertTrue(pg.isDisabledPage(14));
}