harness2.checkPoint("remove update children added");
harness2.check(childrenAdded.length == 1);
harness2.check(childrenAdded[0].getStartOffset() == 0);
harness2.check(childrenAdded[0].getEndOffset() == 57);
harness2.checkPoint("remove udpate childrem removed");
harness2.check(childrenRemoved.length == 2);
harness2.check(childrenRemoved[0].getStartOffset() == 0);
harness2.check(childrenRemoved[0].getEndOffset() == 5);
harness2.check(childrenRemoved[1].getStartOffset() == 5);
harness2.check(childrenRemoved[1].getEndOffset() == 57);