try {
      Iterator<E> iterator = collection.iterator();
      assertTrue(collection.removeAll(MinimalCollection.of(e0(), e3())));
      iterator.next();
      fail("Expected ConcurrentModificationException");
    } catch (ConcurrentModificationException expected) {
      // success
    }
  }

  /** Trigger the {@code other.size() >= this.size()} case in {@link AbstractSet#removeAll}. */
  @CollectionFeature.Require(SUPPORTS_REMOVE)

  private static final long SMALL_TIMEOUT_MILLIS = 10;

  /** How long to wait when determining that a thread is blocked if we expect it to be blocked. */
  private static final long EXPECTED_HANG_DELAY_MILLIS = 75;

  /**
   * How long to wait when determining that a thread is blocked if we DON'T expect it to be blocked.
   */
  private static final long UNEXPECTED_HANG_DELAY_MILLIS = 10000;

  /**

    } catch (AssertionFailedError expected) {
      assertThat(expected).hasMessageThat().contains("create(null)");
      return;
    }
    fail("should have failed");
  }

  public void testBadEquals_withParameterizedType() throws Exception {
    try {
      tester.testEquals(BadEqualsWithParameterizedType.class);
    } catch (AssertionFailedError expected) {

    try {
      comparator.compare(1, null);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      comparator.compare(null, 2);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      comparator.compare(null, null);
      fail();
    } catch (NullPointerException expected) {
    }
    assertSame(comparator, reserialize(comparator));

    try {
      comparator.compare(1, null);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      comparator.compare(null, 2);
      fail();
    } catch (NullPointerException expected) {
    }
    try {
      comparator.compare(null, null);
      fail();
    } catch (NullPointerException expected) {
    }
    assertSame(comparator, reserialize(comparator));

  public void testTimeoutOnGetWorksCorrectly() throws InterruptedException, ExecutionException {

    // The task thread waits for the latch, so we expect a timeout here.
    try {
      future.get(20, MILLISECONDS);
      fail("Should have timed out trying to get the value.");
    } catch (TimeoutException expected) {
    } finally {
      latch.countDown();
    }
  }

  /**

 * com.google.common.collect.testing.CollectionTestSuiteBuilder}.
 *
 * @author Chris Povirk
 */
@GwtCompatible(emulated = true)
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class CollectionCreationTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)

                    .spliterator())
        .expect(ImmutableList.of());
    SpliteratorTester.of(
            () ->
                Streams.mapWithIndex(
                        collectionImpl.apply(ImmutableList.of("a", "b", "c", "d", "e")),
                        (str, i) -> str + ":" + i)
                    .spliterator())
        .expect("a:0", "b:1", "c:2", "d:3", "e:4");
  }

 * directly; please see {@link com.google.common.collect.testing.CollectionTestSuiteBuilder}.
 *
 * @author Chris Povirk
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class CollectionRetainAllTester<E> extends AbstractCollectionTester<E> {

  /** A collection of elements to retain, along with a description for use in failure messages. */

 * @param <K> The key type of the map implementation under test.
 * @param <V> The value type of the map implementation under test.
 */
@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class MapEntrySetTester<K, V> extends AbstractMapTester<K, V> {
  private enum IncomparableType {
    INSTANCE;
  }

  @CollectionSize.Require(ONE)