final Map<String, String> params = new HashMap<>();
        params.put(ExtractData.RESOURCE_NAME_KEY, "test-document.pdf");

        final ExtractData result = filenameExtractor.getText(in, params);

        assertNotNull(result);
        assertEquals("test-document.pdf", result.getContent());
    }

    /**
     * Test extraction with null parameters map.
     */

        int matchCount = 0;
        for (int i = 0; i < tokens.size(); i++) {
            final String term = tokens.get(i).getTerm();
            final String reading = readingTokens.get(i).getTerm();
            switch (term) {
            case "fess":
                matchCount++;
                assertEquals("fess", reading);
                break;
            case "検索":

        final ExtractData result = textExtractor.getText(in, null);

        assertNotNull(result);
        assertNotNull(result.getContent());
    }

    /**
     * Test that null input stream throws CrawlerSystemException with correct message.
     */
    public void test_getText_nullInputStream_throwsWithMessage() {
        try {
            textExtractor.getText(null, null);

        SuggestResponse response = new SuggestResponse("test-index", 100, words, 10, items);

        assertNotNull(response.getItems());
        assertEquals(2, response.getItems().size());
    }

    @Test
    public void test_emptyResponse() throws Exception {
        List<String> words = new ArrayList<>();
        List<SuggestItem> items = new ArrayList<>();

        assertNull(data.getMethod());
        assertNull(data.getUrl());
        assertEquals(1.0f, data.getWeight(), 0.001f);
    }

    public void test_methodGetterSetter() {
        // Test Method enum getter/setter
        RequestData data = new RequestData();

        data.setMethod(Method.GET);
        assertEquals(Method.GET, data.getMethod());

        data.setMethod(Method.POST);

        final String content = xmlExtractor.getText(in, null).getContent();
        CloseableUtil.closeQuietly(in);
        logger.info(content);
        assertTrue(content.contains("テスト"));
    }

    public void test_getXml_entity() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/test_entity.xml");
        final String content = xmlExtractor.getText(in, null).getContent();

        }
    }

    /**
     * Test that validateInputStream is called during getText execution.
     */
    public void test_validateInputStream_calledDuringGetText() {
        final InputStream in = new ByteArrayInputStream("test data".getBytes());

        extractor.getText(in, null);

        assertTrue("validateInputStream should be called", extractor.isValidateCalled());

        PopularWordsResponse response = new PopularWordsResponse("test-index", 100, words, 10, items);

        assertNotNull(response.getItems());
        assertEquals(2, response.getItems().size());
    }

    @Test
    public void test_emptyResponse() throws Exception {
        List<String> words = new ArrayList<>();
        List<SuggestItem> items = new ArrayList<>();

    }

    public void test_getText() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/csv/test.csv");
        final ExtractData extractData = csvExtractor.getText(in, null);
        CloseableUtil.closeQuietly(in);

        final String content = extractData.getContent();
        logger.info(content);

        // Verify header extraction

        CloseableUtil.closeQuietly(in);

        final String content = extractData.getContent();

        // Verify array element extraction
        assertTrue(content.contains("tags[0]"));
        assertTrue(content.contains("crawler"));
    }

    public void test_getText_null() {
        try {
            jsonExtractor.getText(null, null);
            fail();