expected = assertThrows(PotentialDeadlockException.class, () -> lockA.lock());
    checkMessage(expected, "LockB -> LockA", "LockA -> LockB");
    // The causal chain should be cached.
    assertSame(firstException.getCause(), expected.getCause());
    // lockA should work after lockB is released.
    lockB.unlock();
    lockA.lock();
  }

  // Tests transitive deadlock detection.

    expected = assertThrows(PotentialDeadlockException.class, () -> lockA.lock());
    checkMessage(expected, "LockB -> LockA", "LockA -> LockB");
    // The causal chain should be cached.
    assertSame(firstException.getCause(), expected.getCause());
    // lockA should work after lockB is released.
    lockB.unlock();
    lockA.lock();
  }

  // Tests transitive deadlock detection.

    assertTrue(asList(entrySetToArray1).containsAll(entrySet));

    Entry<?, ?>[] entrySetToArray2 = new Entry<?, ?>[map.size() + 2];
    entrySetToArray2[map.size()] = mapEntry("foo", 1);
    assertSame(entrySetToArray2, entrySet.toArray(entrySetToArray2));
    assertNull(entrySetToArray2[map.size()]);
    assertTrue(asList(entrySetToArray2).containsAll(entrySet));

    Object[] valuesToArray1 = valueCollection.toArray();

        new EqualsTester().addEqualityGroup(hashFunction1a, hashFunction1b).testEquals();

        // Make sure we're returning not only equal instances, but constants.
        assertSame(hashFunction1a, hashFunction1b);

        assertEquals(hashFunction1a.toString(), hashFunction1b.toString());
      }
    }
  }

  private static boolean shouldHaveKnownHashes(Method method) {

    Object key = new Object();
    Object value = new Object();
    LoadingCache<Object, Object> cache =
        builder.build(CacheLoader.from(Suppliers.ofInstance(value)));
    assertSame(value, cache.getUnchecked(key));
    assertEquals(0, cache.size());
    assertFalse(cache.asMap().containsKey(key));
  }

  public void testCacheBuilderFrom_string() {
    CacheBuilder<?, ?> fromString =

 *
 * @author Brian Stoler
 */
public class AbstractFutureTest extends TestCase {
  public void testSuccess() throws ExecutionException, InterruptedException {
    final Object value = new Object();
    assertSame(
        value,
        new AbstractFuture<Object>() {
          {
            set(value);
          }
        }.get());
  }

  public void testException() throws InterruptedException {

    return suite;
  }

  public void testRoundTripSources() throws Exception {
    File asciiFile = getTestFile("ascii.txt");
    ByteSource byteSource = Files.asByteSource(asciiFile);
    assertSame(byteSource, byteSource.asCharSource(UTF_8).asByteSource(UTF_8));
  }

  public void testToByteArray() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");

    assertTrue(asList(entrySetToArray1).containsAll(entrySet));

    Entry<?, ?>[] entrySetToArray2 = new Entry<?, ?>[map.size() + 2];
    entrySetToArray2[map.size()] = mapEntry("foo", 1);
    assertSame(entrySetToArray2, entrySet.toArray(entrySetToArray2));
    assertNull(entrySetToArray2[map.size()]);
    assertTrue(asList(entrySetToArray2).containsAll(entrySet));

    Object[] valuesToArray1 = valueCollection.toArray();

    LoadingCache<Object, Object> nullCache =
        CacheBuilder.newBuilder().maximumSize(0).removalListener(listener).build(identityLoader());
    assertEquals(0, nullCache.size());
    Object key = new Object();
    assertSame(key, nullCache.getUnchecked(key));
    assertEquals(1, listener.getCount());
    assertEquals(0, nullCache.size());
    CacheTesting.checkEmpty(nullCache.asMap());
  }

  @GwtIncompatible // QueuingRemovalListener

    return suite;
  }

  public void testRoundTripSources() throws Exception {
    File asciiFile = getTestFile("ascii.txt");
    ByteSource byteSource = Files.asByteSource(asciiFile);
    assertSame(byteSource, byteSource.asCharSource(UTF_8).asByteSource(UTF_8));
  }

  public void testToByteArray() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File i18nFile = getTestFile("i18n.txt");