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

    @Test
    public void test_getMessage_withWhitespaceMessage() {
        // Test constructor with whitespace-only message
        String whitespaceMessage = "   ";
        SsoProcessException exception = new SsoProcessException(whitespaceMessage);

Shinsuke Sugaya <******@****.***> 1768120985 +0900