assertTrue("Should find tab item", foundTab);
        assertTrue("Should find newline item", foundNewline);
        assertTrue("Should find test3", foundTest3);
    }

    public void test_update_fromInputStream() throws IOException {
        // Create test input stream
        String content = "updated1\n" + "updated2\n";
        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));