void testCaseInsensitiveExtensions() throws IOException {
            assertEquals("application/pdf", mimeMap.getMimeType("PDF"));
            assertEquals("application/pdf", mimeMap.getMimeType("Pdf"));
            assertEquals("application/pdf", mimeMap.getMimeType("pDf"));
            assertEquals("text/html", mimeMap.getMimeType("HTML"));
            assertEquals("text/html", mimeMap.getMimeType("HtMl"));

    }

    @Test
    public void test_add_overwrite() {
        fileTypeHelper.add("application/pdf", "pdf");
        assertEquals("pdf", fileTypeHelper.get("application/pdf"));

        fileTypeHelper.add("application/pdf", "document");
        assertEquals("document", fileTypeHelper.get("application/pdf"));
    }

    @Test
    public void test_add_withNullMimetype() {
        fileTypeHelper.add(null, "test");

    private static final String WEB_FILE_RULE_PATTERN = "(application/xml" //
            + "|application/xhtml\\+xml" //
            + "|application/rdf\\+xml" //
            + "|application/pdf" //
            + "|application/x-freemind" //
            + "|text/xml" //
            + "|text/xml-external-parsed-entity)";

    // Pattern from fsFileRule in rule.xml

        "fe012443-6ba9-4ef2-bb94-b729d2060c78/test123/testw3c.pdf/xl.meta": {"Versions":[{"Type":1,"V2Obj":{"ID":"aGEA/ZUOR4ueRIZsAgfDqA==","DDir":"9MMwM47bS+K6KvQqN3hlDw==","EcAlgo":1,"EcM":2,"EcN":2,"EcBSize":1048576,"EcIndex":1,"EcDist":[4,1,2,3],"CSumAl...

	testCases := []struct {
		objectName string
		sipHash    int
	}{
		// cases which should pass the test.
		// passing in valid object name.
		{"object", 37},
		{"The Shining Script <v1>.pdf", 38},
		{"Cost Benefit Analysis (2009-2010).pptx", 59},
		{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", 35},
		{"SHØRT", 49},
		{"There are far too many object names, and far too few bucket names!", 8},
		{"a/b/c/", 159},

        final ResponseData responseData = new ResponseData();

        responseData.setUrl("http://example.com/document.pdf");
        assertEquals("http://example.com/document.pdf", responseData.getUrl());

        responseData.setMimeType("application/pdf");
        assertEquals("application/pdf", responseData.getMimeType());

        responseData.setCharSet("UTF-8");
        assertEquals("UTF-8", responseData.getCharSet());

  if [[ -z "${im_cmd}" ]] ; then
    echo "ImageMagick (convert or magick) does not exist."
    exit 1
  fi
  check_command pdftoppm
  check_command unoconv
  tmp_pdf_file=/tmp/thumbnail.$$.pdf
  unoconv -e PageRange=1-1 -o ${tmp_pdf_file} -f pdf "${target_file}"
  if [[ ! -f ${tmp_pdf_file} ]] ; then
    echo "unoconv does not work."
    exit 1
  fi
  tmp_png_prefix=/tmp/thumbnail.png.$$

		</postConstruct>
		<postConstruct name="addRule">
			<arg>"mimeType"</arg>
			<!-- Supported MIME type -->
			<arg>
  "(application/xml"
+ "|application/xhtml\+xml"
+ "|application/rdf\+xml"
+ "|application/pdf"
+ "|application/x-freemind"
+ "|text/xml"
+ "|text/xml-external-parsed-entity)"
			</arg>
		</postConstruct>
	</component>

	<component name="fsFileRule" class="org.codelibs.fess.crawler.rule.impl.RegexRule" >

		<property name="commandList">
			["${path}/generate-thumbnail",
			"pdf",
			"${url}",
			"${outputFile}"]
		</property>
		<property name="generatorList">
			["${path}/generate-thumbnail"]
		</property>
		<postConstruct name="addCondition">
			<arg>"mimetype"</arg>
			<arg>"application/pdf"
			</arg>
		</postConstruct>
		<postConstruct name="register"></postConstruct>
	</component>

        }
    }

    /**
     * Adds or updates a MIME type to file type mapping.
     *
     * @param mimetype the MIME type to map (e.g., "application/pdf")
     * @param filetype the file type classification (e.g., "pdf")
     */
    public void add(final String mimetype, final String filetype) {
        mimetypeMap.put(mimetype, filetype);
    }

    /**