final Throwable[] causes = mcae.getCauses();
                if (causes.length > 0) {
                    t = causes[causes.length - 1];
                }
            }

            String errorName;
            final Throwable cause = t.getCause();
            if (cause != null) {
                errorName = cause.getClass().getCanonicalName();
            } else {

    }

    @Test
    public void test_constructor_withCause() {
        // Test with cause only
        Exception cause = new IllegalStateException("Underlying error");
        DataStoreException exception = new DataStoreException(cause);

        assertNotNull(exception);
        assertEquals(cause, exception.getCause());
        assertEquals("java.lang.IllegalStateException: Underlying error", exception.getMessage());

            executionOrder.clear();
        }
    }

    // Test class that causes NullPointerException
    private static class NullPointerScoreBooster extends ScoreBooster {
        @Override
        public long process() {
            // This will cause NullPointerException when auto-unboxing
            Long nullValue = null;
            return nullValue;
        }
    }

REM FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Djavax.net.ssl.trustStore=/tech/elastic/config/truststore.jks
REM FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -Djavax.net.ssl.trustStorePassword=changeit

REM Causes the JVM to dump its heap on OutOfMemory.
REM set FESS_JAVA_OPTS=%FESS_JAVA_OPTS% -XX:+HeapDumpOnOutOfMemoryError
REM The path to the heap dump location, note directory must exists and have enough
REM space for a full heap dump.

FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j2.disable.jmx=true"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j2.formatMsgNoLookups=true"
FESS_JAVA_OPTS="$FESS_JAVA_OPTS -Dlog4j.skipJansi=true"

# Causes the JVM to dump its heap on OutOfMemory.
#FESS_JAVA_OPTS="$FESS_JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError"
# The path to the heap dump location, note directory must exists and have enough
# space for a full heap dump.

        // Test constructor with message and cause
        String message = "Command execution failed with error";
        Throwable cause = new IllegalStateException("Invalid state");
        CommandExecutionException exception = new CommandExecutionException(message, cause);

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

        // Test constructor with message and Exception cause
        String message = "SSO token validation error";
        Exception cause = new RuntimeException("Invalid token format");
        SsoProcessException exception = new SsoProcessException(message, cause);

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

    @Test

        final Exception cause = new RuntimeException("Underlying error");

        // Execute
        final InvalidQueryException exception = new InvalidQueryException(null, message, cause);

        // Verify
        assertNotNull(exception);
        assertEquals(message, exception.getMessage());
        assertEquals(cause, exception.getCause());
        assertNull(exception.getMessageCode());

        } catch (Exception e) {
            fail("setError should handle valid parameter validation gracefully: " + e.getMessage());
        }

        // Test null exception separately since it causes NullPointerException
        try {
            WebApiUtil.setError(400, (Exception) null);
            fail("setError should throw NullPointerException when passed null exception");
        } catch (NullPointerException e) {

        assertEquals("original query", result);
    }

    @Test
    public void test_regenerateQuery_exception_returnsFailedQuery() {
        client.setChatResponse(null); // causes LlmException

        final String result = client.regenerateQuery("test question", "original query", "no_results", Collections.emptyList());

        assertEquals("original query", result);
    }

    @Test