try {
            System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, "thread-test");

            final String[] results = new String[10];
            Thread[] threads = new Thread[10];

            for (int i = 0; i < 10; i++) {
                final int index = i;
                threads[i] = new Thread(() -> {
                    results[index] = SystemUtil.getSearchEngineHttpAddress();

            destroyProcessCalled = true;
            return 0;
        }
    }

    private static class TestJobProcess extends JobProcess {
        private final int exitValue;
        private final String output;

        public TestJobProcess(int exitValue, String output) {
            super(new TestProcess(exitValue));
            this.exitValue = exitValue;
            this.output = output;

@NullMarked
@GwtCompatible
public class FloatsTest extends TestCase {
  private static final float[] EMPTY = {};
  private static final float[] ARRAY1 = {1.0f};
  private static final float[] ARRAY234 = {2.0f, 3.0f, 4.0f};

  private static final float LEAST = Float.NEGATIVE_INFINITY;
  private static final float GREATEST = Float.POSITIVE_INFINITY;

  private static final float[] NUMBERS =
      new float[] {
        LEAST,
        -Float.MAX_VALUE,

@NullMarked
@GwtCompatible
public class FloatsTest extends TestCase {
  private static final float[] EMPTY = {};
  private static final float[] ARRAY1 = {1.0f};
  private static final float[] ARRAY234 = {2.0f, 3.0f, 4.0f};

  private static final float LEAST = Float.NEGATIVE_INFINITY;
  private static final float GREATEST = Float.POSITIVE_INFINITY;

  private static final float[] NUMBERS =
      new float[] {
        LEAST,
        -Float.MAX_VALUE,

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue

 * Tests for {@code ForwardingList}.
 *
 * @author Robert Konigsberg
 * @author Louis Wasserman
 */
@NullUnmarked
public class ForwardingListTest extends TestCase {
  static final class StandardImplForwardingList<T> extends ForwardingList<T> {
    private final List<T> backingList;

    StandardImplForwardingList(List<T> backingList) {
      this.backingList = backingList;
    }

    @Override
    protected List<T> delegate() {

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue

abstract class AbstractDirectedNetworkConnections<N, E> implements NetworkConnections<N, E> {
  /** Keys are edges incoming to the origin node, values are the source node. */
  final Map<E, N> inEdgeMap;

  /** Keys are edges outgoing from the origin node, values are the target node. */
  final Map<E, N> outEdgeMap;

  private int selfLoopCount;

  AbstractDirectedNetworkConnections(Map<E, N> inEdgeMap, Map<E, N> outEdgeMap, int selfLoopCount) {

import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/** Replacements for JUnit's {@code assertThrows} that work under GWT/J2CL. */
@GwtCompatible
@NullMarked
final class ReflectionFreeAssertThrows {
  interface ThrowingRunnable {
    void run() throws Throwable;
  }

  interface ThrowingSupplier {
    @Nullable Object get() throws Throwable;
  }

  @CanIgnoreReturnValue