assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withWhitespaceType() {
        // Test constructor with whitespace in type
        String type = "  Bearer Token  ";
        String message = "Whitespace in token type";
        InvalidAccessTokenException exception = new InvalidAccessTokenException(type, message);

        assertEquals("  Bearer Token  ", exception.getType());

        tags = PrunedTag.parse(null);
        assertEquals(0, tags.length);

        // Test whitespace only
        tags = PrunedTag.parse("   ");
        assertEquals(0, tags.length);

        // Test commas only
        tags = PrunedTag.parse(",,,");
        assertEquals(0, tags.length);

        // Test mixed whitespace and commas
        tags = PrunedTag.parse(" , , , ");
        assertEquals(0, tags.length);
    }

        assertEquals(ChatIntent.UNCLEAR, ChatIntent.fromValue(null));
    }

    @Test
    public void test_fromValue_empty() {
        // Defaults to UNCLEAR when value is empty or whitespace
        assertEquals(ChatIntent.UNCLEAR, ChatIntent.fromValue(""));
        assertEquals(ChatIntent.UNCLEAR, ChatIntent.fromValue("   "));
    }

    @Test
    public void test_fromValue_unknown() {

        RescorerBuilder<?> result = ltrQueryRescorer.evaluate(params);
        assertNull(result);
    }

    @Test
    public void test_evaluate_withWhitespaceModelName() {
        // Test when model name contains only whitespace
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override
            public String getLtrModelName() {
                return "   ";
            }

            @Override

        assertEquals("", basePath);

        basePath = virtualHostHelper.getVirtualHostBasePath("  ", new HtmlNext("/test"));
        assertEquals("", basePath); // StringUtil.isBlank considers whitespace as blank
    }

    @Test
    public void test_getVirtualHostKey() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

        item.setNewInput(newSpecialInput);
        assertEquals(newSpecialInput, item.toLineString());
    }

    @Test
    public void test_whitespaceHandling() {
        // Test with various whitespace
        StopwordsItem item1 = new StopwordsItem(1, " ");
        assertEquals(" ", item1.getInput());
        assertEquals(" ", item1.toLineString());

        StopwordsItem item2 = new StopwordsItem(2, "\t\n\r");

        assertProvideThrowsException("Test'Classification'");
    }

    @Test
    public void test_provide_withWhitespace() {
        // Test classification names with whitespace
        assertProvideThrowsException(" ");
        assertProvideThrowsException("  ");
        assertProvideThrowsException("\t");
        assertProvideThrowsException("\n");
        assertProvideThrowsException("\r");

        }
        return false;
    }

    /**
     * Checks if the password contains at least one special character.
     * A special character is defined as any character that is not a letter, digit, or whitespace.
     *
     * @param password the password to check
     * @return true if the password contains a special character, false otherwise
     */
    protected boolean containsSpecialChar(final String password) {

        item.setNewInput(newSpecialInput);
        assertEquals(newSpecialInput, item.toLineString());
    }

    @Test
    public void test_whitespaceHandling() {
        // Test with various whitespace scenarios
        ProtwordsItem item1 = new ProtwordsItem(1, "  word  ");
        assertEquals("  word  ", item1.getInput());
        assertEquals("  word  ", item1.toLineString());

        corsFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

        assertTrue(mockFilterChain.wasDoFilterCalled());
        assertFalse(corsHandlerFactory.wasGetCalled());
    }

    // Test with whitespace-only Origin header
    @Test
    public void test_doFilter_whitespaceOriginHeader() throws IOException, ServletException {
        mockRequest.setHeader("Origin", "   ");