import java.util.regex.MatchResult;
import java.util.regex.Pattern;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Unit test for {@link ArbitraryInstances}.
 *
 * @author Ben Yu
 */
@NullUnmarked
public class ArbitraryInstancesTest extends TestCase {

  public void testGet_primitives() {

import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.Arrays;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link ByteStreams}.
 *
 * @author Chris Nokleberg
 */
@NullUnmarked
public class ByteStreamsTest extends IoTestCase {

  public void testCopyChannel() throws IOException {

    }
    
    public int getLeaseVersion() {
        return getIntProperty(LEASE_VERSION, 2);  // Default to V2 if supported
    }
}
```

## 8. Testing Strategy

### 8.1 Unit Tests
```java
package jcifs.tests.smb3;

import org.junit.Test;
import static org.junit.Assert.*;

public class LeaseTest {
    
    @Test
    public void testLeaseKeyGeneration() {

 */
package org.codelibs.fess.api;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;

import java.util.Map;

import org.codelibs.core.io.FileUtil;
import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.fess.Constants;
import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.PrunedTag;
import org.codelibs.nekohtml.parsers.DOMParser;
import org.junit.jupiter.api.Test;

import okhttp3.FakeRoutePlanner
import okhttp3.FakeRoutePlanner.ConnectState.TLS_CONNECTED
import okhttp3.internal.concurrent.TaskFaker
import org.junit.jupiter.api.AfterEach
import org.junit.jupiter.api.Test

/**
 * Unit test for [FastFallbackExchangeFinder] implementation details.
 *
 * This test uses [TaskFaker] to deterministically test racy code. Each function in this test has
 * the same structure:
 *

import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.Arrays;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link ByteStreams}.
 *
 * @author Chris Nokleberg
 */
@NullUnmarked
public class ByteStreamsTest extends IoTestCase {

  public void testCopyChannel() throws IOException {

import java.io.InputStream;
import java.io.OutputStream;

import org.codelibs.core.io.InputStreamUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;
import org.lastaflute.web.response.StreamResponse;
import org.lastaflute.web.servlet.request.stream.WrittenStreamOut;

import java.util.concurrent.atomic.AtomicReference;

import org.codelibs.core.misc.Pair;
import org.codelibs.fess.app.web.base.login.EntraIdCredential.EntraIdUser;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

public class EntraIdAuthenticatorTest extends UnitFessTestCase {
    @Test
    public void test_addGroupOrRoleName() {

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.junit.jupiter.api.Test;

public class KuromojiCSVUtilTest extends UnitFessTestCase {
    @Test
    public void test_parse_basic() {
        String value;
        List<String> expected;