mockFilterChain = new TestFilterChain();
    }

    // Test with no Origin header
    @Test
    public void test_doFilter_noOriginHeader() throws IOException, ServletException {
        mockRequest.setHeader("Origin", null);

        corsFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

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

        }

        // Set SSE headers
        response.setContentType("text/event-stream");
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Cache-Control", "no-cache");
        response.setHeader("Connection", "keep-alive");
        response.setHeader("X-Accel-Buffering", "no"); // Disable nginx buffering

        try (final PrintWriter writer = response.getWriter()) {

                if (StringUtil.isBlank(responseContentType)) {
                    response.setHeader("Content-Type", "application/json");
                } else {
                    response.setHeader("Content-Type", responseContentType);
                }
                CopyUtil.copy(in, out);
            } catch (final ClientAbortException e) {

        public void process(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            response.setHeader("Content-Type", "application/json");
            response.setHeader("Cache-Control", "no-cache");
        }
    }

    private static class PatternWebApiManager implements WebApiManager {
        private final String pattern;

        }
    }

    @Override
    protected void writeHeaders(final HttpServletResponse response) {
        ComponentUtil.getFessConfig().getApiJsonResponseHeaderList().forEach(e -> response.setHeader(e.getFirst(), e.getSecond()));
    }

    /**
     * Writes a JSON response.
     * @param status The status code.
     * @param t The throwable.
     */

            }

            @Override
            public void addDateHeader(String name, long date) {
            }

            @Override
            public void setHeader(String name, String value) {
            }

            @Override
            public void addHeader(String name, String value) {
            }

            @Override

            options.setEncoding("utf-8");
            options.setDocEncoding("utf-8");
            options.setCharSet("utf-8");

            options.addBooleanOption("-allow-script-in-comments", true);
            options.setHeader(
                "<link id=\"hljs-theme\" rel=\"stylesheet\" href=\"https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.11.1/styles/stackoverflow-light.min.css\">" +
                    "<script>" +

            }

            @Override
            public void addDateHeader(String name, long date) {
            }

            @Override
            public void setHeader(String name, String value) {
                List<String> values = new ArrayList<>();
                values.add(value);
                responseHeaders.put(name, values);
            }

            @Override

        }

        @Override
        public void setContentType(String type) {
            this.contentType = type;
        }

        @Override
        public void setHeader(String name, String value) {
            headers.put(name, value);
        }

        @Override
        public PrintWriter getWriter() {
            return writer;
        }

        @Override