assertFalse(d.getParametersDone(), "parametersDone should be false for partial read");
        assertFalse(d.getDataDone(), "dataDone should be false for partial read");
        assertTrue(d.getHasMore(), "hasMore should remain true for partial read");
    }

    /**
     * Test scenario with no data to read
     */
    @Test
    public void readBytesWireFormat_noData_succeeds() {
        DummyResponse d = new DummyResponse();

        doc.put("content", "コンテンツ");

        languageHelper.updateDocument(doc);

        assertEquals("ja", doc.get("lang"));
        assertEquals("既存のタイトル", doc.get("title_ja")); // Should remain unchanged
        assertEquals("コンテンツ", doc.get("content_ja"));
    }

    public void test_detectLanguage_blank() {
        assertNull(languageHelper.detectLanguage(null));

            assertEquals(0x12345 & 0xFFFF, req.getMaxCount(), "maxCount should contain lower 16 bits");
            assertEquals(0x12345, req.getMinCount(), "minCount should remain original full value");
        }

        @Test
        @DisplayName("Named pipe request uses fixed 1024 hints")
        void namedPipeRequestHints() throws Exception {

        // When
        int bytesWritten = response.writeBytesWireFormat(buffer, 10);

        // Then
        assertEquals(0, bytesWritten);
        assertArrayEquals(originalBuffer, buffer); // Buffer should remain unchanged
    }

    @Test
    @DisplayName("Should handle null configuration gracefully")
    void testNullConfiguration() {
        // When - constructor accepts null config without throwing

        byte[] originalRequestBuffer = negotiation.getRequestRaw();
        byte[] originalResponseBuffer = negotiation.getResponseRaw();

        // Verify fields remain unchanged on subsequent calls
        assertSame(originalRequest, negotiation.getRequest());
        assertSame(originalResponse, negotiation.getResponse());
        assertSame(originalRequestBuffer, negotiation.getRequestRaw());

      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including

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        assertDoesNotThrow(() -> emptyIterator.remove(), "remove() should be safe to call");

        // Verify still empty after operations
        assertFalse(emptyIterator.hasNext(), "Should remain empty after operations");
    }

      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including

      editorial revisions, annotations, elaborations, or other modifications
      represent, as a whole, an original work of authorship. For the purposes
      of this License, Derivative Works shall not include works that remain
      separable from, or merely link (or bind by name) to the interfaces of,
      the Work and Derivative Works thereof.

      "Contribution" shall mean any work of authorship, including