headers.put("Content-Type", Arrays.asList("application/json"));
        headers.put("Content-Length", Arrays.asList("100"));

        response.setHeaders(headers);

        Map<String, List<String>> result = response.getHeaders();
        assertNotNull(result);
        // Headers should be stored in lowercase
        assertTrue(result.containsKey("content-type"));

            return null;
        }

        @Override
        public long getDateHeader(String name) {
            return -1;
        }

        @Override
        public java.util.Enumeration<String> getHeaders(String name) {
            return java.util.Collections.emptyEnumeration();
        }

        @Override
        public java.util.Enumeration<String> getHeaderNames() {

        public long getDateHeader(String name) {
            return -1;
        }

        @Override
        public String getHeader(String name) {
            return null;
        }

        @Override
        public java.util.Enumeration<String> getHeaders(String name) {
            return java.util.Collections.emptyEnumeration();
        }

        @Override

                return 0;
            }

            @Override
            public String getHeader(String name) {
                return null;
            }

            @Override
            public java.util.Enumeration<String> getHeaders(String name) {
                return null;
            }

            @Override

                return 0;
            }

            @Override
            public String getHeader(String name) {
                return null;
            }

            @Override
            public java.util.Enumeration<String> getHeaders(String name) {
                return null;
            }

            @Override

            return new Cookie[0];
        }

        @Override
        public long getDateHeader(String name) {
            return -1;
        }

        @Override
        public Enumeration<String> getHeaders(String name) {
            return null;
        }

        @Override
        public Enumeration<String> getHeaderNames() {
            return null;
        }

        @Override

            throw new UnsupportedOperationException();
        }

        @Override
        public String getHeader(String name) {
            throw new UnsupportedOperationException();
        }

        @Override
        public java.util.Enumeration<String> getHeaders(String name) {
            throw new UnsupportedOperationException();
        }

        @Override

            searchLog.setClientIp(StringUtils.abbreviate(ComponentUtil.getViewHelper().getClientIp(req), 100));
            searchLog.setReferer(StringUtils.abbreviate(req.getHeader("referer"), 1000));
            searchLog.setUserAgent(StringUtils.abbreviate(req.getHeader("user-agent"), 255));
            final Object accessType = req.getAttribute(Constants.SEARCH_LOG_ACCESS_TYPE);

        // Initialize filter first
        initializeFilter();

        // Test request without Authorization header should challenge client
        when(request.getHeader("Authorization")).thenReturn(null);
        when(httpSession.getAttribute("NtlmHttpAuth")).thenReturn(null);

        filter.doFilter(request, response, filterChain);

     * @throws IOException
     */
    @Test
    void testService_NoAuthHeader_NoSession() throws ServletException, IOException {
        ntlmServlet.init(servletConfig);
        when(request.getHeader("Authorization")).thenReturn(null);
        when(request.getSession(false)).thenReturn(null);
        lenient().when(request.isSecure()).thenReturn(true);

        ntlmServlet.service(request, response);