assertTrue(stringRep.contains("RuntimeCIFSException"));
        assertTrue(stringRep.contains(message));
    }

    @Test
    @DisplayName("Should handle various message types")
    void testVariousMessageTypes() {
        // Test empty message
        assertDoesNotThrow(() -> {
            RuntimeCIFSException exception = new RuntimeCIFSException("");
            assertEquals("", exception.getMessage());
        });