assertNull(nullException.getMessage());
    }

    @Test
    @DisplayName("Test constructor with cause creates exception with specified cause")
    public void testConstructorWithCause() {
        // Create a root cause exception
        RuntimeException rootCause = new RuntimeException("Root cause error");
        TransportException exception = new TransportException(rootCause);

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    @DisplayName("Should create RuntimeCIFSException with cause")
    void testConstructorWithCause() {
        // Given
        Throwable cause = new IllegalArgumentException("Invalid argument");

        // When
        RuntimeCIFSException exception = new RuntimeCIFSException(cause);

        // Then