ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testengine");
        assertNotNull(retrieved);
        assertEquals(engine, retrieved);
    }

    // Test add method with mixed case name
    public void test_add_mixedCaseName() {
        TestScriptEngine engine = new TestScriptEngine();
        scriptEngineFactory.add("TestEngine", engine);

        // Should be accessible with lowercase

          // 1-byte UTF-8 sequences - "American" ASCII text
          return 0x80;
        } else if (userFriendly.matches("(?i)(?:French|Latin|Western.*European)")) {
          // Mostly 1-byte UTF-8 sequences, mixed with occasional 2-byte
          // sequences - "Western European" text
          return 0x90;
        } else if (userFriendly.matches("(?i)(?:Branch.*Prediction.*Hostile)")) {

    "input": "xn--tešla",
    "output": null
  },
  {
    "comment": "Valid Punycode",
    "input": "xn--zca.xn--zca",
    "output": "xn--zca.xn--zca"
  },
  {
    "comment": "Mixed",
    "input": "xn--zca.ß",
    "output": "xn--zca.xn--zca"
  },
  {
    "input": "ab--c.xn--zca",
    "output": "ab--c.xn--zca"
  },
  {
    "input": "ab--c.ß",
    "output": "ab--c.xn--zca"
  },

        assertEquals(2, paramMap.size());
        assertEquals("value1", paramMap.get("key1"));
        assertEquals("value2", paramMap.get("key2"));

        // Test with empty lines and mixed whitespace
        value = "key1=value1\n\n\t\nkey2=value2\n \n";
        paramMap = ParameterUtil.parse(value);
        assertEquals(2, paramMap.size());
        assertEquals("value1", paramMap.get("key1"));

        @ParameterizedTest
        @DisplayName("getBytes should handle various string inputs")
        @NullAndEmptySource
        @ValueSource(strings = { "Simple ASCII", "Special chars: !@#$%^&*()", "Unicode: ñöt ascii ℃", "Mixed: ASCII + 中文 + Русский",
                "Emojis: 🎉🌟💻", "Very long string with multiple words and various characters 1234567890" })
        void testGetBytesWithVariousInputs(String input) {
            // When

            public String getQueryBrowserLangParameterName() {
                return "lang";
            }
        };
        ComponentUtil.setFessConfig(mockConfig);

        // Setup mock request manager with mixed case
        // LocaleUtils.toLocale is strict about case - it will throw exception for invalid format
        RequestManager mockRequestManager = createMockRequestManager("En_Us");

        // Execute

  @Test
  fun publicSuffixDotOrgTestCases() {
    // Any copyright is dedicated to the Public Domain.
    // https://creativecommons.org/publicdomain/zero/1.0/

    // Mixed case.
    checkPublicSuffix("COM", null)
    checkPublicSuffix("example.COM", "example.com")
    checkPublicSuffix("WwW.example.COM", "example.com")
    // Leading dot.
    checkPublicSuffix(".com", null)

        assertNotNull(str);
        assertTrue(str.contains("test"));
        assertTrue(str.contains("CLOSED"));
        assertTrue(str.contains("100.00%"));
    }

    @Test
    @DisplayName("Test mixed success and failure pattern")
    void testMixedPattern() throws Exception {
        // Success
        circuitBreaker.call(() -> "success");

        // Two failures (not enough to open)

        Kerb5Authenticator b = new Kerb5Authenticator((Subject) null);

        // Both null subjects -> equal
        assertEquals(a, b);
        assertEquals(a.hashCode(), b.hashCode());

        // Mixed null/non-null -> not equal
        Kerb5Authenticator c = new Kerb5Authenticator(new Subject());
        assertNotEquals(a, c);

        // Same subject instance -> equal
        Subject shared = new Subject();

        }
    }

    @Nested
    @DisplayName("Edge Case Tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("UUID with mixed case should parse correctly")
        void testMixedCaseUuid() {
            // Arrange
            String mixedCaseUuid = "00112233-4455-6677-8899-AaBbCcDdEeFf";

            // Act