DataStoreException withCustom = new DataStoreException("Custom Error", new FessSystemException("System error"));

        assertTrue(withIOException.getCause() instanceof java.io.IOException);
        assertTrue(withNPE.getCause() instanceof NullPointerException);
        assertTrue(withCustom.getCause() instanceof FessSystemException);
    }

    public void test_getLongMessage() {
        // Test with very long message

        assertTrue(exception instanceof FessSystemException);
    }

    public void test_constructorWithNullMessage() {
        // Test constructor with null message
        SearchQueryException exception = new SearchQueryException((String) null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
        assertTrue(exception instanceof FessSystemException);
    }

    }

    public void test_instanceOfFessSystemException() {
        // Test that GsaConfigException is an instance of FessSystemException
        GsaConfigException exception = new GsaConfigException("Test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);

        assertNull(exception.getCause());
    }

    public void test_inheritance() {
        // Test that LdapConfigurationException extends FessSystemException
        LdapConfigurationException exception = new LdapConfigurationException("test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);

    }

    public void test_inheritanceFromFessSystemException() {
        // Test that StorageException extends FessSystemException
        StorageException exception = new StorageException("Test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);

    }

    public void test_throwAndCatchAsFessSystemException() {
        // Test catching as parent class FessSystemException
        String expectedMessage = "Caught as FessSystemException";

        try {
            throw new ResultOffsetExceededException(expectedMessage);
        } catch (FessSystemException e) {
            assertEquals(expectedMessage, e.getMessage());

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.security.MessageDigestUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.app.service.CrawlingInfoService;
import org.codelibs.fess.exception.FessSystemException;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.opensearch.config.exentity.CrawlingConfig;

    }

    public void test_instanceOfFessSystemException() {
        // Test that ScriptEngineException is an instance of FessSystemException
        ScriptEngineException exception = new ScriptEngineException("test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);

        assertNull(exception.getCause());
    }

    public void test_inheritance() {
        // Test that ThemeException properly extends FessSystemException
        ThemeException exception = new ThemeException("Test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
        assertTrue(exception instanceof Exception);

        assertNotNull(exception);
        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
    }

    public void test_constructor_withMessageAndCause() {
        // Test constructor with message and cause