User user = createTestUser("testuser");
        for (int i = 0; i < chains.size(); i++) {
            User nextUser = createTestUser("user" + (i + 1));
            chains.get(i).loadResult = nextUser;
        }

        authenticationManager.load(user);

        // Verify chains were called in order
        assertEquals(user.getName(), chains.get(0).lastLoadedUser.getName());

        // Pattern with single backslash (14 chars): should match
        String singleBackslash = "image/svg" + "\\" + "+xml";
        assertEquals("Single backslash pattern should be 14 chars", 14, singleBackslash.length());
        assertTrue(svgMimetype.matches(singleBackslash));

        // Pattern with double backslash (15 chars): should NOT match
        String doubleBackslash = "image/svg" + "\\\\" + "+xml";

        assertTrue(result.contains("field1field2"));
        assertTrue(result.contains("exclude1exclude2"));

        // Count separators
        long separatorCount = result.chars().filter(ch -> ch == '\n').count();
        assertEquals(4, separatorCount);
    }

    @Test
    public void test_getCacheKey_nullParameters() {
        String seed = "test_seed";
        String[] tags = null;

    @Test
    public void test_execute_withSpecialCharactersInConfig() {
        // Configure field and index names with special characters
        expiresFieldName = "expires-field.with@special#chars";
        documentUpdateIndex = "fess.update-index$special%chars";

        // Re-register FessConfig with updated values
        fessConfig = new TestFessConfig() {
            @Override
            public String getIndexFieldExpires() {

                return "u0020u3000";
            }
        };

        int[] chars = fessConfig.getCrawlerDocumentSpaceCharsAsArray();
        assertEquals(2, chars.length);
        assertEquals(32, chars[0]);
        assertEquals(12288, chars[1]);
    }

    @Test
    public void test_getCrawlerDocumentFullstopCharsAsArray() {
        FessProp.propMap.clear();

    @Test
    public void test_getSAXHandlerMethods() throws SAXException {
        GsaConfigParser parser = new GsaConfigParser();

        parser.startDocument();

        char[] chars = "test".toCharArray();
        parser.characters(chars, 0, chars.length);

        parser.endDocument();
    }

        assertEquals("abc", permissionHelper.encode("abc"));
        assertEquals("abc", permissionHelper.decode("abc"));

        assertEquals("special@chars", permissionHelper.encode("special@chars"));
        assertEquals("special@chars", permissionHelper.decode("special@chars"));
    }

        String[] values = { "value with spaces", "value@special#chars", "日本語" };
        RequestParameter param = new RequestParameter(name, values);

        assertEquals(name, param.getName());
        assertNotNull(param.getValues());
        assertEquals(3, param.getValues().length);
        assertEquals("value with spaces", param.getValues()[0]);
        assertEquals("value@special#chars", param.getValues()[1]);

        }

        String details = testableJob.testFormatDetails(events);

        assertNotNull(details);
        // Max 50 events displayed, message truncated to 200 chars
        assertTrue(details.contains("Total: 100 event(s) (showing 50)"));
        assertTrue(details.contains("... and 50 more"));
        // Long messages should be truncated with "..."

        assertNull(result);
    }

    @Test
    public void test_smartSummary_exactlyAtBudget() {
        // omitMarker = "\n...[omitted]...\n" (18 chars), suffix="" (no sources), bodyBudget = 500 - 0 - 18 = 482
        // Content of 482 chars is <= bodyBudget, so returned with suffix (empty) appended as-is
        final String content = "X".repeat(482);
        final ChatMessage msg = ChatMessage.assistantMessage(content);