if (date == null || date.isEmpty()) {
            return true; // Date is optional
        }
        // Basic validation for W3C Datetime format (YYYY-MM-DD or YYYY-MM-DDThh:mm:ss+00:00)
        // This is a simplified validation
        if (date.length() < 10) {
            if (logger.isDebugEnabled()) {
                logger.debug("Invalid date format (too short): {}", date);
            }

    public void testCreateBulkLineWithNullId() {
        // Test that null ID causes exception
        SuggestItem item = new SuggestItem(new String[] { "text" }, new String[0][0], new String[0], 0, 0, 1.0f, new String[0],
                new String[0], new String[0], SuggestItem.Kind.DOCUMENT);
        // Explicitly set ID to null (constructor auto-generates ID)
        item.setId(null);

        assertNotNull(tempFile);
        assertTrue(tempFile.exists());
        assertEquals(10000, tempFile.length());

        // Verify content
        try (FileInputStream fis = new FileInputStream(tempFile)) {
            byte[] buffer = new byte[10000];
            int bytesRead = fis.read(buffer);
            assertEquals(10000, bytesRead);
            for (int i = 0; i < largeData.length; i++) {

        assertEquals("010203", StringUtil.toHex(new byte[] { 1, 2, 3 }));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex2() throws Exception {
        assertEquals("0001", StringUtil.toHex(1));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testAppendHex() throws Exception {
        final StringBuilder buf = new StringBuilder();

-XX:G1HeapRegionSize=1m\n\
-XX:MaxGCPauseMillis=60000\n\
-XX:G1NewSizePercent=5\n\
-XX:G1MaxNewSizePercent=5\n\
-Djcifs.smb.client.responseTimeout=30000\n\
-Djcifs.smb.client.soTimeout=35000\n\
-Djcifs.smb.client.connTimeout=60000\n\
-Djcifs.smb.client.sessionTimeout=60000\n\
-Djcifs.smb1.smb.client.connTimeout=60000\n\
-Djcifs.smb1.smb.client.soTimeout=35000\n\
-Djcifs.smb1.smb.client.responseTimeout=30000\n\
-Dio.netty.noUnsafe=true\n\

        <match value="\nContent-Type:" type="string" offset="0:1000"/>
        <match value="\nContent-Length:" type="string" offset="0:1000"/>
        <match value="\nContent-Disposition:" type="string" offset="0:1000"/>
        <match value="\nDate:" type="string" offset="0:1000"/>
        <match value="\nServer:" type="string" offset="0:1000"/>
      </match>