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

	long createdTime = System.nanoTime();
	mapTable = new FCMapTable(testDir, 1, createdTime, 1000);
	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());
	try {
		@SuppressWarnings("unused")
		GetResult result = mapTable.get("empty".getBytes());
		fail();
	} catch (IllegalArgumentException iae) {
	}
	try {
		mapTable.getMapEntry(-1);
		fail();
	} catch (IllegalArgumentException iae) {
	}
	try {
		mapTable.getMapEntry(0);
	} catch (IllegalArgumentException iae) {
	}
}