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

    @Test
    public void test_constructor_withNullMessage() {
        // Test with null message
        UnsupportedSearchException exception = new UnsupportedSearchException(null);

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

        assertTrue(exception.getMessage().contains(cause.getClass().getName()));
        assertTrue(exception.getMessage().contains("Cause exception"));
    }

    @Test
    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        FessSystemException exception = new FessSystemException((String) null);

        assertNull(exception.getMessage());

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

    @Test
    public void test_constructor_withNullMessage() {
        // Test with null message
        LdapConfigurationException exception = new LdapConfigurationException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());

        assertEquals(cause, exception.getCause());
        assertEquals("Token validation failed", exception.getCause().getMessage());
    }

    @Test
    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        SsoLoginException exception = new SsoLoginException(null);

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

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

    @Test
    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        String type = "OAuth2";
        String message = null;
        InvalidAccessTokenException exception = new InvalidAccessTokenException(type, message);

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

    @Test
    public void test_constructor_withNullMessage() {
        // Setup
        final VaMessenger<FessMessages> messageCode = messages -> messages.addErrorsSsoLoginError(UserMessages.GLOBAL_PROPERTY_KEY);

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

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

    @Test
    public void test_constructor_withNullMessage() {
        // Test constructor with null message
        SsoProcessException exception = new SsoProcessException((String) null);

        assertNull(exception.getMessage());

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

    @Test
    public void test_constructor_withNullMessage() {
        // Setup
        final VaMessenger<FessMessages> messageCode = messages -> messages.addErrorsInvalidQueryUnknown(UserMessages.GLOBAL_PROPERTY_KEY);

Shinsuke Sugaya <******@****.***> 1773442886 +0900