/**
 * Test class for StringUtil utility methods
 */
class StringUtilTest {

    @Test
    @DisplayName("Should join single element without delimiter")
    void testJoinSingleElement() {
        String result = StringUtil.join(",", "hello");
        assertEquals("hello", result);
    }

    @Test
    @DisplayName("Should join two elements with delimiter")
    void testJoinTwoElements() {

        assertNotNull(avFlags, "AvFlags object should not be null");
        assertEquals(0x04030201, avFlags.getFlags(), "Flags should match the raw bytes (little-endian)");

        // Test with zero
        byte[] zeroBytes = new byte[] { 0x00, 0x00, 0x00, 0x00 };
        AvFlags zeroAvFlags = new AvFlags(zeroBytes);
        assertNotNull(zeroAvFlags, "AvFlags object should not be null for zero bytes");

        assertTrue(exception instanceof RuntimeCIFSException, "Should extend RuntimeCIFSException");
        assertTrue(exception instanceof RuntimeException, "Should be a RuntimeException");
    }

    @Test
    @DisplayName("Message constructor should create exception with specified message")
    void testMessageConstructor() {
        // Given & When

        }

        @Test
        @DisplayName("Should initialize with SMB2_WRITE command")
        void testCommandInitialization() {
            Smb2WriteRequest writeRequest = new Smb2WriteRequest(mockConfig, testFileId);
            // Command is set in parent constructor
            assertNotNull(writeRequest);
        }

        @Test
        @DisplayName("Should accept null file ID in constructor")

        assertEquals(mid, request.getMid(), "MID should be set correctly");
        assertEquals(asyncId, request.getAsyncId(), "AsyncId should be set correctly");
        assertEquals(credits, request.getCredit(), "Credits should be set correctly");
        assertEquals(treeId, request.getTreeId(), "Tree ID should be set correctly");
        assertTrue((request.getFlags() & SMB2_FLAGS_ASYNC_COMMAND) != 0, "Async flag should be set for non-zero asyncId");
    }

        assertEquals(message, ex.getMessage(), "Message should be preserved as provided");
        assertNull(ex.getCause(), "Cause should be null when only message is provided");

        // toString should include the class name and (if non-null) the message
        String ts = ex.toString();
        assertTrue(ts.contains("SMBProtocolDecodingException"), "toString should include class name");
        if (message != null && !message.isEmpty()) {

        assertTrue(session.isInUse(), "Session should be in use initially");
        try (SmbSessionImpl autoSession = session) {
            // Session is already in use due to transport acquisition
            assertTrue(autoSession.isInUse(), "Session should be in use");
        }

        // Session should be automatically released
        assertFalse(session.isInUse(), "Session should be released after try-with-resources");
    }

        }

        @Test
        @DisplayName("Should align size to 8-byte boundary")
        void testSizeAlignment() {
            int size = request.size();
            assertEquals(0, size % 8, "Size should be aligned to 8-byte boundary");
        }

        @ParameterizedTest
        @DisplayName("Should calculate size for various lock counts")

        // Test GoodBot - should parse valid directives and ignore invalid ones
        assertNotNull(robotsTxt.getDirective("goodbot"));
        assertFalse(robotsTxt.allows("/admin/", "GoodBot"));
        assertTrue(robotsTxt.allows("/public/", "GoodBot"));
        // Invalid directives should not cause parsing to fail

        // Test crawl-delay with invalid values
        // Invalid number should be ignored, valid ones should work

            // Assert - verify inheritance chain
            assertTrue(msg instanceof samr.SamrConnect2, "Should extend SamrConnect2");
            assertTrue(msg instanceof DcerpcMessage, "Should extend DcerpcMessage");
            assertTrue(msg instanceof NdrObject, "Should extend NdrObject");
        }

        @Test
        @DisplayName("should inherit getOpnum method")
        void testGetOpnumMethod() {
            // Arrange