} catch (Exception e) {
            fail("processDBFluteSystem should handle unlock/lock properly: " + e.getMessage());
        }
    }

    // Helper method to get TimeZoneProvider from DBFluteSystem using reflection
    private DfFinalTimeZoneProvider getDBFluteSystemTimeZoneProvider() {
        try {

        verifyNfold("kerberos", 8,
                new byte[] { (byte) 0x6b, (byte) 0x65, (byte) 0x72, (byte) 0x62, (byte) 0x65, (byte) 0x72, (byte) 0x6f, (byte) 0x73 });
    }

    /**
     * Helper method to verify n-fold expansion.
     */
    private void verifyNfold(String input, int outlen, byte[] expected) {
        byte[] result = PacMac.expandNFold(input.getBytes(), outlen);

import java.util.List;
import java.util.Map;

import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.JobProcessingException;
import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;

            fail("Unexpected IOException: " + e.getMessage());
        } catch (ServletException e) {
            assertEquals("Chain ServletException", e.getMessage());
        }
    }

    // Helper method to create mock HttpServletRequest
    private HttpServletRequest createMockHttpServletRequest() {
        return new HttpServletRequest() {
            @Override
            public Object getAttribute(String name) {

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.JobProcessingException;
import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;

        }
    }

    // ===================================================================================
    //                                                                      General Helper
    //                                                                      ==============
    protected void assertObjectNotNull(String variableName, Object value) {
        if (variableName == null) {

		debugGoCollectorPath: collectors.NewGoCollector(),
	}

	// Add all `MetricGroup` collectors to the map.
	for _, mg := range allMetricGroups {
		collectors[mg.CollectorPath] = mg
	}

	// Helper function to register a collector and return a gatherer for it.
	mustRegister := func(c ...prometheus.Collector) prometheus.Gatherer {
		subRegistry := prometheus.NewRegistry()
		for _, col := range c {

        BehaviorExceptionThrower thrower2 = invokerAssistant.assistBehaviorExceptionThrower();
        assertNotSame(thrower1, thrower2);
    }

    // Helper method to check if array contains a value
    private boolean containsValue(String[] array, String value) {
        for (String element : array) {
            if (element.equals(value)) {
                return true;

import java.util.concurrent.TimeoutException;
import junit.framework.AssertionFailedError;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * A helper for concurrency testing. One or more {@code TestThread} instances are instantiated in a
 * test with reference to the same "lock-like object", and then their interactions with that object

        // Create URL with registered handler
        URL smbUrl = new URL("smb://server/share/dir/");
        lenient().when(locator.getURL()).thenReturn(smbUrl);
    }

    // Helper: reflectively set private/protected field on an object
    private static void setField(Object target, Class<?> declaring, String name, Object value) {
        try {
            Field f = declaring.getDeclaredField(name);