/**
     * Ensure toString includes the exception class name and message, providing a readable representation.
     */
    @Test
    @DisplayName("toString contains class name and message")
    void toString_containsClassAndMessage() {
        // Arrange
        String msg = "login denied";
        SmbAuthException ex = new SmbAuthException(msg);

        // Act
        String s = ex.toString();

        // Assert