list.addOrMerge(400, 500, true, false);
assertEquals(1, list.get().listSize());
assertEquals(500, list.get().getTotalLength());
list = new CreateHelper();
list.addOrMerge(0, 100, false, false);
list.addOrMerge(400, 500, false, false);
assertEquals(5, list.get().listSize());
assertEquals(500, list.get().getTotalLength());
list = new CreateHelper();
list.addOrMerge(0, 100, true, false);
list.addOrMerge(400, 500, true, false);
assertEquals(2, list.get().listSize());
assertEquals(500, list.get().getTotalLength());