}
        try (final ResponseData responseData = s3Client.doHead("s3://fess/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = s3Client.doHead("s3://fess/dir1/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = s3Client.doHead("s3://fess/dir1/dir2/")) {

public class ExtractDataTest extends PlainTestCase {

    public void test_defaultConstructor() {
        // Test default constructor
        ExtractData data = new ExtractData();
        assertNotNull(data);
        assertNull(data.getContent());
        assertNotNull(data.getKeySet());
        assertTrue(data.getKeySet().isEmpty());
    }

    public void test_constructorWithContent() {
        // Test constructor with content

        // Set to null
        CrawlingParameterUtil.setUrlQueue(null);

        // Should be null now
        assertNull(CrawlingParameterUtil.getUrlQueue());
    }

    public void test_crawlerContext_setAndGet() {
        // Initially should be null
        assertNull(CrawlingParameterUtil.getCrawlerContext());

        // Create and set a CrawlerContext

            assertNull(responseData.getResponseBody());
            assertNull(responseData.getMetaDataMap().get("label"));
        }
        try (final ResponseData responseData = storageClient.doHead("storage://fess/")) {
            assertNull(responseData);
        }
        try (final ResponseData responseData = storageClient.doHead("storage://fess/dir1/")) {
            assertNull(responseData);
        }

        assertNull(((SitemapUrl) sitemaps[1]).getChangefreq());
        assertNull(((SitemapUrl) sitemaps[1]).getPriority());

        assertNull(sitemaps[2].getLastmod());
        assertEquals("http://www.example.com/catalog?item=73&desc=vacation_new_zealand", sitemaps[2].getLoc());
        assertNull(((SitemapUrl) sitemaps[2]).getChangefreq());
        assertNull(((SitemapUrl) sitemaps[2]).getPriority());

        final ExtractData extractData = jsonExtractor.getText(in, null);
        CloseableUtil.closeQuietly(in);

        // Verify no metadata extracted
        assertNull(extractData.getValues("title"));
        assertNull(extractData.getValues("author"));

        // But content should still be present
        final String content = extractData.getContent();
        assertTrue(content.contains("Sample Document"));

            assertNull(responseData.getResponseBody());
            assertNull(responseData.getMetaDataMap().get("label"));
        }
        try (final ResponseData responseData = gcsClient.doHead("gcs://fess/dir3/file4.txt")) {
            assertEquals("gcs://fess/dir3/file4.txt", responseData.getUrl());
            assertEquals("application/octet-stream", responseData.getMimeType());
            assertNull(responseData.getResponseBody());

        assertEquals(Method.GET, request.method());
        assertEquals("UTF-8", request.encoding());
        assertEquals(1024 * 1024, request.threshold());
        assertNull(request.proxy());
        assertNull(request.body());
    }

    @Test
    public void testConstructorWithNullUrl() {
        // URL can be null with the two-argument constructor

        Handler.GcsURLConnection conn = (Handler.GcsURLConnection) handler.openConnection(url);

        // Verify GCS Storage client is not initialized before connect() is called
        assertNull(getField(conn, "storage"));
    }

    /**
     * Test that connect() method fails when GCS_PROJECT_ID is not set.
     */
    public void test_connect_failsWithoutProjectId() throws Exception {

        final ExtractData extractData = markdownExtractor.getText(in, null);
        CloseableUtil.closeQuietly(in);

        // Verify no front matter metadata
        assertNull(extractData.getValues("frontmatter.title"));
        assertNull(extractData.getValues("frontmatter.author"));

        // But content should still be present
        final String content = extractData.getContent();