@Test
 public void commitTest() throws Exception {
   dataTable.put(
       "1", tableProvider.deserialize(dataTable, "<row><col>98</col><col>bear</col></row>"));
   dataTable.put(
       "3", tableProvider.deserialize(dataTable, "<row><col>5</col><col>pig</col></row>"));
   dataTable.remove("3");
   Assert.assertEquals(dataTable.commit(), 1);
 }