assertEquals("953.674GB", MemoryUtil.byteCountToDisplaySize(999_999_999_999L));
        assertEquals("953.674GB", MemoryUtil.byteCountToDisplaySize(1000_000_000_000L));
        assertEquals("1.024TB", MemoryUtil.byteCountToDisplaySize(FileUtils.ONE_TB));
        assertEquals("931.322TB", MemoryUtil.byteCountToDisplaySize(999_999_999_999_999L));

        assertNull(accesstokenpager.createdTime);
        assertNull(accesstokenpager.versionNo);

        accesstokenpager.setAllRecordCount(999);
        assertEquals(999, accesstokenpager.getAllRecordCount());
        accesstokenpager.setAllPageCount(999);
        assertEquals(999, accesstokenpager.getAllPageCount());
        accesstokenpager.setExistPrePage(true);
        assertTrue(accesstokenpager.isExistPrePage());

        assertNull(badwordpager.versionNo);

        assertEquals(1, badwordpager.getDefaultCurrentPageNumber());
        badwordpager.setAllRecordCount(999);
        assertEquals(999, badwordpager.getAllRecordCount());
        badwordpager.setAllPageCount(999);
        assertEquals(999, badwordpager.getAllPageCount());
        badwordpager.setExistPrePage(true);
        assertTrue(badwordpager.isExistPrePage());

        assertEquals(1, charmappingpager.getDefaultCurrentPageNumber());

        charmappingpager.setAllRecordCount(999);
        assertEquals(999, charmappingpager.getAllRecordCount());
        charmappingpager.setAllPageCount(999);
        assertEquals(999, charmappingpager.getAllRecordCount());
        charmappingpager.setExistPrePage(true);
        assertTrue(charmappingpager.isExistPrePage());

    assertThat(formatDuration(  -999_500_000L)).isEqualTo(" -1 s ")
    assertThat(formatDuration(  -999_499_999L)).isEqualTo("-999 ms")
    assertThat(formatDuration(  -998_500_000L)).isEqualTo("-999 ms")
    assertThat(formatDuration(  -998_499_999L)).isEqualTo("-998 ms")
    assertThat(formatDuration(    -1_499_999L)).isEqualTo(" -1 ms")
    assertThat(formatDuration(      -999_500L)).isEqualTo(" -1 ms")

        assertEquals(1, crawlinginfopage.getDefaultCurrentPageNumber());
        crawlinginfopage.setAllRecordCount(999);
        assertEquals(999, crawlinginfopage.getAllRecordCount());
        crawlinginfopage.setAllPageCount(999);
        assertEquals(999, crawlinginfopage.getAllPageCount());
        crawlinginfopage.setExistPrePage(true);
        assertTrue(crawlinginfopage.isExistPrePage());

        assertNull(boostdocpager.createdTime);
        assertNull(boostdocpager.versionNo);

        boostdocpager.setAllRecordCount(999);
        assertEquals(999, boostdocpager.getAllRecordCount());
        boostdocpager.setAllPageCount(999);
        assertEquals(999, boostdocpager.getAllPageCount());
        boostdocpager.setExistPrePage(true);
        assertTrue(boostdocpager.isExistPrePage());

        assertNull(dataconfigpager.versionNo);

        assertEquals(1, dataconfigpager.getDefaultCurrentPageNumber());
        dataconfigpager.setAllRecordCount(999);
        assertEquals(999, dataconfigpager.getAllRecordCount());
        dataconfigpager.setAllPageCount(999);
        assertEquals(999, dataconfigpager.getAllPageCount());
        dataconfigpager.setExistPrePage(true);
        assertTrue(dataconfigpager.isExistPrePage());

        assertEquals(1, duplicatehostpager.getDefaultCurrentPageNumber());
        duplicatehostpager.setAllRecordCount(999);
        assertEquals(999, duplicatehostpager.getAllRecordCount());
        duplicatehostpager.setAllPageCount(999);
        assertEquals(999, duplicatehostpager.getAllPageCount());
        duplicatehostpager.setExistPrePage(true);
        assertTrue(duplicatehostpager.isExistPrePage());

 */
fun formatDuration(ns: Long): String {
  val s =
    when {
      ns <= -999_500_000 -> "${(ns - 500_000_000) / 1_000_000_000} s "
      ns <= -999_500 -> "${(ns - 500_000) / 1_000_000} ms"
      ns <= 0 -> "${(ns - 500) / 1_000} µs"
      ns < 999_500 -> "${(ns + 500) / 1_000} µs"
      ns < 999_500_000 -> "${(ns + 500_000) / 1_000_000} ms"
      else -> "${(ns + 500_000_000) / 1_000_000_000} s "
    }