int expected =
            force32(aUnsigned.bigIntegerValue().multiply(bUnsigned.bigIntegerValue()).intValue());
        UnsignedInteger unsignedMul = aUnsigned.times(bUnsigned);
        assertWithMessage(aUnsigned + " * " + bUnsigned)
            .that(unsignedMul.intValue())
            .isEqualTo(expected);
      }
    }
  }

  public void testDividedBy() {

   * note that the execution order of all listeners is ultimately chosen by the implementations of
   * the supplied executors.
   *
   * <p>This method is idempotent. Calling it several times in parallel is semantically equivalent
   * to calling it exactly once.
   *
   * @since 10.0 (present in 1.0 as {@code run})
   */
  public void execute() {

            }

            @Override
            public void stop() {
                stopCallCount.incrementAndGet();
            }
        };

        // Execute stop multiple times
        dataStore.stop();
        dataStore.stop();
        dataStore.stop();

        assertEquals(3, stopCallCount.get());
    }

    public void test_store_and_stop_lifecycle() {

  private var waitingCoordinatorTask: SerialTask? = null
  private var waitingCoordinatorInterrupted = false
  private var waitingCoordinatorNotified = false

  /** How many times a new task has been started. Guarded by `this`. */
  private var contextSwitchCount = 0

  /** Guarded by `this`. */
  private var activeThreads = 0

   * escaping for code points if required.
   *
   * <p>Note that arrays returned by this method must not be modified once they have been returned.
   * However it is acceptable to return the same array multiple times (even for different input
   * characters).
   *
   * @param cp the Unicode code point to escape
   * @return the replacement characters, or {@code null} if no escaping was required
   */

   * original transformation and its inverse to a value gives you the original value give-or-take
   * numerical errors. Calling this method multiple times on the same instance will always return
   * the same instance. Calling this method on the result of calling this method on an instance will
   * always return that original instance.
   */

import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.lenient;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;

In this case, it would be better to get **one extra server** and run some processes on it so that they all have **enough RAM and CPU time**.

import java.util.concurrent.atomic.AtomicInteger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tests relating to cache expiration: make sure entries expire at the right times, make sure
 * expired entries don't show up, etc.
 *
 * @author mike nonemacher
 */
@SuppressWarnings("deprecation") // tests of deprecated method
@NullUnmarked
public class CacheExpirationTest extends TestCase {

    val elapsedUntilPong3 = System.nanoTime() - startNanos
    assertThat(TimeUnit.NANOSECONDS.toMillis(elapsedUntilPong3).toDouble())
      .isCloseTo(1500.0, 250.0)

    // The client pinged the server 3 times, and it has ponged back 3 times.
    assertThat(webSocket.sentPingCount()).isEqualTo(3)
    assertThat(server.receivedPingCount()).isEqualTo(3)
    assertThat(webSocket.receivedPongCount()).isEqualTo(3)