if (!fatals.contains(req.getMessage())) {
                    fatals.add(req.getMessage());
                }
                break;
            case ERROR:
                if (!errors.contains(req.getMessage())) {
                    errors.add(req.getMessage());
                }
                break;
            case WARNING:
                if (!warnings.contains(req.getMessage())) {

            throw new TransferFailedException("Connection failed: " + e.getMessage(), e);
        } catch (AuthenticationException e) {
            throw new TransferFailedException("Authentication failed: " + e.getMessage(), e);
        } catch (AuthorizationException e) {
            throw new TransferFailedException("Authorization failed: " + e.getMessage(), e);
        } finally {

                UnresolvableModelException.class,
                () -> newModelResolver().resolveModel(parent),
                "Expected 'UnresolvableModelException' not thrown.");
        assertNotNull(e.getMessage());
        assertTrue(e.getMessage().contains("Could not find artifact ut.simple:artifact:pom:0 in repo"));
    }

    @Test
    public void testResolveParentThrowsUnresolvableModelExceptionWhenNoMatchingVersionFound() throws Exception {

        assertEquals(message, exception.getMessage());
        assertSame(cause, exception.getCause());
        assertTrue(exception instanceof RuntimeException);
    }

    @Test
    public void testConstructorWithNullMessage() {
        CurlException exception = new CurlException(null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test

        // Verify the exception message indicates name resolution failure
        assertTrue(exception.getMessage().contains("NONEXISTENT") || exception.getMessage().contains("unknown")
                || exception.getMessage().contains("not found"), "Exception message should indicate name resolution failure");
    }

    @Test

        try {
            processHelper.sendCommand("nonexistent", "test command");
            fail("Expected JobNotFoundException");
        } catch (JobNotFoundException e) {
            assertTrue(e.getMessage().contains("Job for nonexistent is not found"));
        }
    }

    @Test
    public void test_startProcess_basicCommand() {
        String sessionId = "test_session";

        assertTrue(exception.getMessage().contains("FILE_EXISTS"));
        assertTrue(exception.getMessage().contains("File already exists"));
        assertTrue(exception.getMessage().contains("document.pdf already exists"));

        // Without custom message
        exception = new SmbOperationException(SmbOperationException.ErrorCode.DISK_FULL, null);
        assertTrue(exception.getMessage().contains("DISK_FULL"));

        // Arrange & Act
        SMBProtocolDowngradeException ex = new SMBProtocolDowngradeException();

        // Assert - message and cause are null
        assertNull(ex.getMessage(), "Default constructor should have null message");
        assertNull(ex.getCause(), "Default constructor should have null cause");

        // Assert - toString shows class name when message is null

        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new Pac(emptyData, keys));
        // Any PACDecodingException is acceptable for this test
        assertNotNull(e.getMessage());
    }

    @Test
    void testTooSmallPac() {
        // Test that PAC smaller than 8 bytes is rejected
        byte[] smallData = new byte[4];

     * Test the default constructor.
     */
    @Test
    void testDefaultConstructor() {
        PACDecodingException e = new PACDecodingException();
        // Expect null message and null cause
        assertNull(e.getMessage());
        assertNull(e.getCause());
    }

    /**
     * Test the constructor with a message.
     */
    @Test
    void testMessageConstructor() {