StringBuffer sb2 = new StringBuffer("beta");
        String result = StringUtil.join("-", sb1, sb2);
        assertEquals("alpha-beta", result);
    }

    @Test
    @DisplayName("Should handle mixed CharSequence types")
    void testJoinWithMixedCharSequenceTypes() {
        String str = "string";
        StringBuilder builder = new StringBuilder("builder");
        StringBuffer buffer = new StringBuffer("buffer");

        assertNotNull(results);
        // Should use Japanese analyzer and transliterator
    }

    @Test
    public void testConvertWithMixedLanguageText() throws IOException {
        // Test convert with mixed language text
        String text = "test テスト";
        String field = "content";

        List<String> results = converter.convert(text, field, "en", "ja");

        assertNotNull(results);
    }

		{
			ipList:       []string{"hostname", "127.0.0.1", "192.168.1.106"},
			sortedIPList: []string{"hostname", "192.168.1.106", "127.0.0.1"},
		},
		// Non parsable ip is assumed to be hostname, with a mixed input of ip and hostname.
		// gets preserved and moved into left most elements, regardless of
		// IP based sorting.
		{
			ipList:       []string{"hostname1", "10.0.0.13", "hostname2", "127.0.0.1", "192.168.1.106"},

        assertEquals(builder, result); // Test method chaining
        assertEquals("test_index", builder.settingsIndexName);

        // Test setting index name with mixed case
        builder.setSettingsIndexName("TeSt_InDeX_NaMe");
        assertEquals("test_index_name", builder.settingsIndexName);

        // Test setting index name that's already lowercase

        assertEquals("オオサカ", ((TestAnalyzeToken) tokens.get(1)).getReading());
    }

    @Test
    public void testAnalyzeAndReadingWithMixedContent() {
        // Test analyzeAndReading with mixed content (numbers, letters, special chars)
        String text = "Test123 ABC-456";
        String field = "content";
        String lang = "en";

        } catch (SmbException e) {
            // Expected
        }

        try {
            validator.validatePath("\\share\\Con");
            fail("Should block mixed case reserved name");
        } catch (SmbException e) {
            // Expected
        }
    }

    @Test
    public void testValidFileExtensions() throws Exception {

        // Test with Unicode characters
        testTransformer.setName("変換器の名前");
        assertEquals("変換器の名前", testTransformer.getName());

        // Test with mixed characters
        testTransformer.setName("Transformer-変換器-123");
        assertEquals("Transformer-変換器-123", testTransformer.getName());
    }

    /**
     * Test name with very long string
     */

    val contentType: MediaType = multipartBody.contentType()
    val contentLength: Long = multipartBody.contentLength()
    multipartBody.writeTo(Buffer())
    val mixed: MediaType = MultipartBody.MIXED
    val alternative: MediaType = MultipartBody.ALTERNATIVE
    val digest: MediaType = MultipartBody.DIGEST
    val parallel: MediaType = MultipartBody.PARALLEL
    val form: MediaType = MultipartBody.FORM

        }
    }

    @Test
    public void testRollingWindowMetrics() throws Exception {
        SmbCircuitBreaker cbWithWindow = new SmbCircuitBreaker("window-test");

        try {
            // Execute mixed operations
            for (int i = 0; i < 10; i++) {
                final int iteration = i; // Make effectively final for lambda
                try {
                    cbWithWindow.executeWithCircuitBreaker(() -> {

  fun checkLowercase(name: ByteString): ByteString {
    for (i in 0 until name.size) {
      if (name[i] in 'A'.code.toByte()..'Z'.code.toByte()) {
        throw IOException("PROTOCOL_ERROR response malformed: mixed case name: ${name.utf8()}")
      }
    }
    return name
  }