public void testAsMapValuesImplementList() {
    for (Collection<V> valueCollection : multimap().asMap().values()) {
      assertTrue(valueCollection instanceof List);
    }
  }

  public void testAsMapGetImplementsList() {
    for (K key : multimap().keySet()) {
      assertTrue(multimap().asMap().get(key) instanceof List);
    }
  }

  @MapFeature.Require(SUPPORTS_REMOVE)

  public void testAsMapValuesImplementList() {
    for (Collection<V> valueCollection : multimap().asMap().values()) {
      assertTrue(valueCollection instanceof List);
    }
  }

  public void testAsMapGetImplementsList() {
    for (K key : multimap().keySet()) {
      assertTrue(multimap().asMap().get(key) instanceof List);
    }
  }

  @MapFeature.Require(SUPPORTS_REMOVE)

  }

  public void testCartesianProduct_contains() {
    List<List<Integer>> actual = cartesianProduct(list(1, 2), list(3, 4));
    assertTrue(actual.contains(list(1, 3)));
    assertTrue(actual.contains(list(1, 4)));
    assertTrue(actual.contains(list(2, 3)));
    assertTrue(actual.contains(list(2, 4)));
    assertFalse(actual.contains(list(3, 1)));
  }

  public void testCartesianProduct_indexOf() {

    }

    private void assertVersionOlder(String left, String right) {
        assertTrue(
                newArtifactVersion(left).compareTo(newArtifactVersion(right)) < 0,
                left + " should be older than " + right);
        assertTrue(
                newArtifactVersion(right).compareTo(newArtifactVersion(left)) > 0,
                right + " should be newer than " + left);

  public void testRemove() {
    Iterator<String> iterator = create();

    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertThrows(UnsupportedOperationException.class, () -> iterator.remove());
  }

  @SuppressWarnings("DoNotCall")
  public void testAdd() {
    ListIterator<String> iterator = create();

    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());

        }
        assertTrue(desc, isTimed(method));
        break;
      case 3:
        assertTrue(desc, isGuarded(method));
        assertTrue(desc, isTimed(method));
        break;
      default:
        fail(desc);
    }

    if (method.getReturnType() == void.class) {
      assertFalse(desc, isBoolean(method));
    } else {
      assertTrue(desc, isBoolean(method));
    }

 */
@GwtCompatible
@NullMarked
public class SortedIterablesTest extends TestCase {
  public void testSameComparator() {
    assertTrue(SortedIterables.hasSameComparator(Ordering.natural(), Sets.newTreeSet()));
    assertTrue(SortedIterables.hasSameComparator(Ordering.natural(), Maps.newTreeMap().keySet()));
    assertTrue(
        SortedIterables.hasSameComparator(
            Ordering.natural().reverse(), Sets.newTreeSet(Ordering.natural().reverse())));

        assertTrue(artifact1.compareTo(artifact2) < 0);
        assertTrue(artifact2.compareTo(artifact1) > 0);

        Artifact artifact = new DefaultArtifact(
                groupId, artifactId, VersionRange.createFromVersion("5.0"), scope, type, classifier, artifactHandler);
        assertTrue(artifact.compareTo(artifact1) == 0);
        assertTrue(artifact1.compareTo(artifact) == 0);
    }

        assertEquals(parentProject, projects.get(0));

        // the order of these two is non-deterministic, based on when they're added to the reactor.
        assertTrue(projects.contains(pluginProject), "Expected " + projects + " to contain " + pluginProject);
        assertTrue(
                projects.contains(pluginLevelDepProject),
                "Expected " + projects + " to contain " + pluginLevelDepProject);

    Multimap<String, Integer> filtered = filterValues(keyFiltered, VALUE_PREDICATE);
    assertEquals(1, filtered.size());
    assertTrue(filtered.containsEntry("foo", 1));
    assertTrue(filtered.keySet().retainAll(asList("cat", "dog")));
    assertEquals(0, filtered.size());
  }

  // TODO(jlevy): Many more tests needed.