assertNull(generator.expandPath(null));

        // Test with exact match mappings (expandPath only replaces exact matches)
        generator.filePathMap.put("${home}/file", "/home/user/file");
        assertEquals("/home/user/file", generator.expandPath("${home}/file"));
        assertEquals("other/path", generator.expandPath("other/path"));

        // Test another exact mapping
        generator.filePathMap.put("${temp}", "/tmp");

        assertNull(negotiationAllNull.getResponseRaw());
    }

    @Test
    @DisplayName("getRequest should return the same request instance")
    void testGetRequest() {
        // Verify getRequest returns the exact same instance
        SmbNegotiationRequest request = negotiation.getRequest();
        assertSame(mockRequest, request);

        // Verify multiple calls return the same instance

                () -> assertEquals(6118, WinError.ERROR_NO_BROWSER_SERVERS_FOUND));
    }

    @Test
    @DisplayName("Arrays: non-null, same length, and exact contents")
    void arrays_are_well_formed_and_match() {
        // Validate arrays existence and alignment (edge and structure checks)
        assertNotNull(WinError.WINERR_CODES, "WINERR_CODES should not be null");

        assertEquals(bytes1, bytes2);
        assertEquals(4, bytes1);
    }

    @Test
    @DisplayName("Should verify exact structure size value")
    void testExactStructureSizeValue() throws SMBProtocolDecodingException {
        // Given
        byte[] buffer = new byte[256];

        // Write exact structure size value (4)
        buffer[0] = 0x04;
        buffer[1] = 0x00;
        buffer[2] = 0x00;

        when(locator.handleDFSReferral(referral, reqPath)).thenReturn(resolved);

        String out = locator.handleDFSReferral(referral, reqPath);
        assertEquals(resolved, out);

        // Verify exact argument interaction
        verify(locator, times(1)).handleDFSReferral(referral, reqPath);
        verifyNoMoreInteractions(locator);
    }

    // Edge / invalid: null referral or empty/blank path
    @Test

        // Test with short string
        ace.appendCol(sb, "test", 10);
        assertEquals("test      ", sb.toString());

        // Test with exact width string
        sb = new StringBuffer();
        ace.appendCol(sb, "exact", 5);
        assertEquals("exact", sb.toString());

        // Test with longer string than width
        sb = new StringBuffer();
        ace.appendCol(sb, "longer string", 5);

        @DisplayName("Should handle structure size exactly 17")
        void testExactStructureSize() throws SMBProtocolDecodingException {
            byte[] buffer = new byte[64];
            SMBUtil.writeInt2(17, buffer, 0); // Exact required size
            SMBUtil.writeInt2(0, buffer, 2);
            SMBUtil.writeInt4(1000, buffer, 4);
            SMBUtil.writeInt4(500, buffer, 8);
            SMBUtil.writeInt4(0, buffer, 12);

        assertThrows(PACDecodingException.class, () -> new PacCredentialType(null));
    }

    /**
     * Tests the isCredentialTypeCorrect method with a byte array of exact minimal buffer size.
     * This test is also indirect.
     */
    @Test
    void testIsCredentialTypeCorrectWithExactSizeData() {
        // The constructor check `if (!isCredentialTypeCorrect())` handles this case.

            e.decode(buffer, bufferIndex, len);

            /*
             * lastNameOffset ends up pointing to either to
             * the exact location of the filename(e.g. Win98)
             * or to the start of the entry containing the
             * filename(e.g. NT). Ahhrg! In either case the
             * lastNameOffset falls between the start of the

        assertArrayEquals(machineId, actualMachineId);
    }

    /**
     * Test with customData and machineId that are not exactly 8 and 32 bytes respectively.
     * The constructor requires exact sizes, so we need to pad them manually.
     */
    @Test
    void testAvSingleHostCustomDataMachineIdConstructor_ShorterInputs() {
        // Prepare padded arrays
        byte[] customData = new byte[8];