.expireAfterWrite(EXPIRING_TIME, MILLISECONDS)
            .removalListener(removalListener)
            .ticker(ticker)
            .build(loader);
    checkExpiration(cache, loader, ticker, removalListener);
  }

  public void testExpiration_expireAfterAccess() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();

  private static class Timestamped<V> {
    private final V value;
    private final Ticker ticker;
    private long writeTimestamp;
    private long accessTimestamp;

    public Timestamped(V value, Ticker ticker) {
      this.value = checkNotNull(value);
      this.ticker = checkNotNull(ticker);
      this.writeTimestamp = ticker.read();
      this.accessTimestamp = this.writeTimestamp;
    }

  }

  public void testExpireAfterAccess() {
    final Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .expireAfterAccess(1000, TimeUnit.MILLISECONDS)
            .ticker(fakeTicker)
            .build();

    cache.put(0, 10);
    cache.put(2, 30);

    fakeTicker.advance(999, TimeUnit.MILLISECONDS);
    assertEquals(Integer.valueOf(30), cache.getIfPresent(2));

   * @throws IllegalStateException if a ticker was already set
   */
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> ticker(Ticker ticker) {
    checkState(this.ticker == null);
    this.ticker = checkNotNull(ticker);
    return this;
  }

  Ticker getTicker(boolean recordsTime) {
    if (ticker != null) {
      return ticker;
    }
    return recordsTime ? Ticker.systemTicker() : NULL_TICKER;
  }

  }

  public void testExpireAfterAccess() {
    final Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .expireAfterAccess(1000, TimeUnit.MILLISECONDS)
            .ticker(fakeTicker)
            .build();

    cache.put(0, 10);
    cache.put(2, 30);

    fakeTicker.advance(999, TimeUnit.MILLISECONDS);
    assertEquals(Integer.valueOf(30), cache.getIfPresent(2));

          .put(com.google.common.base.Optional.class, com.google.common.base.Optional.absent())
          .put(Predicate.class, Predicates.alwaysTrue())
          .put(Equivalence.class, Equivalence.equals())
          .put(Ticker.class, Ticker.systemTicker())
          .put(Stopwatch.class, Stopwatch.createUnstarted())
          // io types
          .put(InputStream.class, new ByteArrayInputStream(new byte[0]))

          .put(com.google.common.base.Optional.class, com.google.common.base.Optional.absent())
          .put(Predicate.class, Predicates.alwaysTrue())
          .put(Equivalence.class, Equivalence.equals())
          .put(Ticker.class, Ticker.systemTicker())
          .put(Stopwatch.class, Stopwatch.createUnstarted())
          // io types
          .put(InputStream.class, new ByteArrayInputStream(new byte[0]))

import com.google.common.base.Equivalence;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Predicate;
import com.google.common.base.Splitter;
import com.google.common.base.Ticker;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.BiMap;
import com.google.common.collect.HashBasedTable;
import com.google.common.collect.HashBiMap;

  }

  public void testTicker_setTwice() {
    Ticker testTicker = Ticker.systemTicker();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().ticker(testTicker);
    try {
      // even to the same instance is not allowed
      builder.ticker(testTicker);
      fail();
    } catch (IllegalStateException expected) {
    }
  }

import com.google.common.base.Equivalence;
import com.google.common.base.Joiner;
import com.google.common.base.Predicate;
import com.google.common.base.Splitter;
import com.google.common.base.Stopwatch;
import com.google.common.base.Ticker;
import com.google.common.collect.BiMap;
import com.google.common.collect.ClassToInstanceMap;
import com.google.common.collect.ImmutableBiMap;
import com.google.common.collect.ImmutableClassToInstanceMap;