@Test
public void testLoopAndReopen() throws IOException, ClassNotFoundException {

	long createdTime = System.nanoTime();
	int loop =  32 * 1024;
	mapTable = new FCMapTable(testDir, 1, createdTime, loop);
	assertTrue(mapTable.getLevel() == 1);
	assertTrue(mapTable.getCreatedTime() == createdTime);
	assertTrue(mapTable.getAppendedSize() == 0);
	assertTrue(mapTable.isEmpty());
	assertTrue(mapTable.getBackFileSize() == HashMapTable.INIT_INDEX_FILE_SIZE + HashMapTable.INIT_DATA_FILE_SIZE  + HashMapTable.INDEX_ITEM_LENGTH);
	assertFalse(mapTable.isUsable());
	List<byte[]> list = new ArrayList<byte[]>();
	for(int i = 0; i < loop; i++) {
		list.add(("key" + i).getBytes());
	}
	Collections.sort(list, new Comparator<byte[]>() {
		@Override
		public int compare(byte[] arg0, byte[] arg1) {
			int hash0 = Arrays.hashCode(arg0);
			int hash1 = Arrays.hashCode(arg1);
			if (hash0 < hash1) return -1;
			else if (hash0 > hash1) return 1;
			else return 0;
		}
	});
	for(int i = 0; i < loop; i++) {
		mapTable.appendNew(list.get(i), ("value" + i).getBytes(), -1);
	}
	assertTrue(mapTable.getAppendedSize() == loop);
	long start = System.currentTimeMillis();
	for(int i = 0; i < loop; i++) {
		GetResult result = mapTable.get(("key" + i).getBytes());
		assertTrue(result.isFound());
	}
	long time = System.currentTimeMillis() - start;
	System.out.printf("Get %,d K ops per second%n",
			(int) (loop / time));
	GetResult result = mapTable.get(("key" + loop).getBytes());
	assertFalse(result.isFound());
	assertFalse(result.isDeleted() || result.isExpired());
	mapTable.markUsable(true);
	mapTable.saveMetadata();
	mapTable.close();
	mapTable = new FCMapTable(testDir, mapTable.getFileName());
	assertTrue(mapTable.isUsable());
	assertTrue(mapTable.getAppendedSize() == loop);
	for(int i = 0; i < loop; i++) {
		result = mapTable.get(("key" + i).getBytes());
		assertTrue(result.isFound());
	}
	result = mapTable.get(("key" + loop).getBytes());
	assertFalse(result.isFound());
	assertFalse(result.isDeleted() || result.isExpired());
	mapTable.markUsable(false);
	mapTable.saveMetadata();
	mapTable.close();
	mapTable = new FCMapTable(testDir, mapTable.getFileName());
	assertFalse(mapTable.isUsable());
	assertTrue(mapTable.getAppendedSize() == loop);
	for(int i = 0; i < loop; i++) {
		result = mapTable.get(("key" + i).getBytes());
		assertTrue(result.isFound());
	}
}