@Test
	public void deletetest() throws Exception{
		int count =0;
		bookcollectb.delete(book1);
		try{
			ObjectInputStream osi = new ObjectInputStream(new FileInputStream("bookcollectiontest.txt"));///óϾ , Ͼ׳ϴ° ҽ߰
			bookcollectb.setBookCount(osi.readInt());
			bookcollectb.collectionb.clear();
			for( int i= 0; i< bookcollectb.getBookCount();i++){
				Book bk = (Book)osi.readObject();
				if(bk.title.equals("Ʈũ") == true)
					count++;
			}
			assertTrue(count == bookcollectb.getBookCount());
		}catch(Exception e){
		}
	}