#vulnerable code 
                                @Test
    public void testEndOfFileBehaviorCSV() throws Exception {
        String[] codes = {
                "hello,\r\n\r\nworld,\r\n",
                "hello,\r\n\r\nworld,",
                "hello,\r\n\r\nworld,\"\"\r\n",
                "hello,\r\n\r\nworld,\"\"",
                "hello,\r\n\r\nworld,\n",
                "hello,\r\n\r\nworld,",
                "hello,\r\n\r\nworld,\"\"\n",
                "hello,\r\n\r\nworld,\"\""
        };
        String[][] res = {
                {"hello", ""},  // CSV format ignores empty lines
                {"world", ""}
        };
        for (String code : codes) {
            CSVParser parser = new CSVParser(new StringReader(code));
            String[][] tmp = parser.getRecords();
            assertEquals(res.length, tmp.length);
            assertTrue(tmp.length > 0);
            for (int i = 0; i < res.length; i++) {
                assertTrue(Arrays.equals(res[i], tmp[i]));
            }
        }
    } 
                            #location 20 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void testEndOfFileBehaviorCSV() throws Exception {
        String[] codes = {
                "hello,\r\n\r\nworld,\r\n",
                "hello,\r\n\r\nworld,",
                "hello,\r\n\r\nworld,\"\"\r\n",
                "hello,\r\n\r\nworld,\"\"",
                "hello,\r\n\r\nworld,\n",
                "hello,\r\n\r\nworld,",
                "hello,\r\n\r\nworld,\"\"\n",
                "hello,\r\n\r\nworld,\"\""
        };
        String[][] res = {
                {"hello", ""},  // CSV format ignores empty lines
                {"world", ""}
        };
        for (String code : codes) {
            CSVParser parser = new CSVParser(new StringReader(code));
            List<CSVRecord> records = parser.getRecords();
            assertEquals(res.length, records.size());
            assertTrue(records.size() > 0);
            for (int i = 0; i < res.length; i++) {
                assertTrue(Arrays.equals(res[i], records.get(i).values()));
            }
        }
    }