configHelper.setLoadCallback(() -> {
            latch.countDown();
            return 1;
        });

        configHelper.update();

        assertTrue("Load method should be called within 5 seconds", latch.await(5, TimeUnit.SECONDS));
        assertEquals(1, configHelper.getLoadCallCount());
    }

    public void test_update_multipleCallsIncrementLoadCount() throws InterruptedException {

  public void testParse_writeExpirationSeconds() {
    CacheBuilderSpec spec = parse("expireAfterWrite=10s");
    assertEquals(SECONDS, spec.writeExpirationTimeUnit);
    assertEquals(10L, spec.writeExpirationDuration);
    assertCacheBuilderEquivalence(
        CacheBuilder.newBuilder().expireAfterWrite(10L, SECONDS), CacheBuilder.from(spec));
  }

  public void testParse_writeExpirationRepeated() {
    assertThrows(

 * the License.
 */

package com.google.common.util.concurrent.testing;

import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static java.util.concurrent.TimeUnit.SECONDS;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;

    assertTrue(latch.await(5, SECONDS));
    assertTrue(future.isDone());
    assertFalse(future.isCancelled());

    assertEquals(expectedValue, future.get());
  }

  public void testCancelledFuture() throws InterruptedException, ExecutionException {
    assertTrue(future.isDone());
    assertTrue(future.isCancelled());

    assertTrue(latch.await(5, SECONDS));
    assertTrue(future.isDone());

  static final String FIRST = "one";
  static final Double SECOND = 2.0d;

  final EventBus bus = new EventBus();

  public void testNoReentrantEvents() {
    ReentrantEventsHater hater = new ReentrantEventsHater();
    bus.register(hater);

    bus.post(FIRST);

    assertEquals(
        "ReentrantEventHater expected 2 events",
        Lists.<Object>newArrayList(FIRST, SECOND),
        hater.eventsReceived);
  }

import static com.google.common.cache.TestingRemovalListeners.queuingRemovalListener;
import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.cache.CacheLoader.InvalidCacheLoadException;
import com.google.common.cache.TestingRemovalListeners.QueuingRemovalListener;

import static com.google.common.cache.TestingRemovalListeners.queuingRemovalListener;
import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.cache.CacheLoader.InvalidCacheLoadException;
import com.google.common.cache.TestingRemovalListeners.QueuingRemovalListener;

  }

  public void testTimeToLive_setTwice() {
    CacheBuilder<Object, Object> builder =
        CacheBuilder.newBuilder().expireAfterWrite(3600, SECONDS);
    assertThrows(IllegalStateException.class, () -> builder.expireAfterWrite(3600, SECONDS));
  }

  @GwtIncompatible // Duration
  public void testTimeToLive_setTwice_duration() {
    CacheBuilder<Object, Object> builder =

  }

  public void testTimeToLive_setTwice() {
    CacheBuilder<Object, Object> builder =
        CacheBuilder.newBuilder().expireAfterWrite(3600, SECONDS);
    assertThrows(IllegalStateException.class, () -> builder.expireAfterWrite(3600, SECONDS));
  }

  @GwtIncompatible // Duration
  public void testTimeToLive_setTwice_duration() {
    CacheBuilder<Object, Object> builder =

  fun completeBuilder() {
    val cacheControl =
      CacheControl
        .Builder()
        .noCache()
        .noStore()
        .maxAge(1, TimeUnit.SECONDS)
        .maxStale(2, TimeUnit.SECONDS)
        .minFresh(3, TimeUnit.SECONDS)
        .onlyIfCached()
        .noTransform()
        .immutable()
        .build()
    assertThat(cacheControl.toString()).isEqualTo(