/**
 * Creates maps, containing sample elements, to be tested.
 *
 * @author George van den Driessche
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
    extends TestContainerGenerator<Map<K, V>, Map.Entry<K, V>> {
  K[] createKeyArray(int length);

  V[] createValueArray(int length);

/**
 * Creates maps, containing sample elements, to be tested.
 *
 * @author George van den Driessche
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
    extends TestContainerGenerator<Map<K, V>, Map.Entry<K, V>> {
  K[] createKeyArray(int length);

  V[] createValueArray(int length);

  static class ForwardingTestMapGenerator<K extends @Nullable Object, V extends @Nullable Object>
      implements TestMapGenerator<K, V> {
    TestMapGenerator<K, V> delegate;

    ForwardingTestMapGenerator(TestMapGenerator<K, V> delegate) {
      this.delegate = delegate;
    }

    @Override
    public Iterable<Entry<K, V>> order(List<Entry<K, V>> insertionOrder) {

import java.util.Map;
import java.util.Map.Entry;

/**
 * Implementation helper for {@link TestMapGenerator} for use with maps of strings.
 *
 * @author Chris Povirk
 * @author Jared Levy
 * @author George van den Driessche
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestStringMapGenerator implements TestMapGenerator<String, String> {

  @Override
  public SampleElements<Entry<String, String>> samples() {

import java.util.Map;
import java.util.Map.Entry;

/**
 * Implementation helper for {@link TestMapGenerator} for use with maps of strings.
 *
 * @author Chris Povirk
 * @author Jared Levy
 * @author George van den Driessche
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestStringMapGenerator implements TestMapGenerator<String, String> {

  @Override
  public SampleElements<Entry<String, String>> samples() {

 */
@GwtIncompatible
public class MapTestSuiteBuilder<K, V>
    extends PerCollectionSizeTestSuiteBuilder<
        MapTestSuiteBuilder<K, V>, TestMapGenerator<K, V>, Map<K, V>, Entry<K, V>> {
  public static <K, V> MapTestSuiteBuilder<K, V> using(TestMapGenerator<K, V> generator) {
    return new MapTestSuiteBuilder<K, V>().usingGenerator(generator);
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override

 */
@GwtIncompatible
public class MapTestSuiteBuilder<K, V>
    extends PerCollectionSizeTestSuiteBuilder<
        MapTestSuiteBuilder<K, V>, TestMapGenerator<K, V>, Map<K, V>, Entry<K, V>> {
  public static <K, V> MapTestSuiteBuilder<K, V> using(TestMapGenerator<K, V> generator) {
    return new MapTestSuiteBuilder<K, V>().usingGenerator(generator);
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override

 *
 * @author Louis Wasserman
 */
@GwtIncompatible
public class ConcurrentMapTestSuiteBuilder<K, V> extends MapTestSuiteBuilder<K, V> {
  public static <K, V> ConcurrentMapTestSuiteBuilder<K, V> using(TestMapGenerator<K, V> generator) {
    ConcurrentMapTestSuiteBuilder<K, V> result = new ConcurrentMapTestSuiteBuilder<>();
    result.usingGenerator(generator);
    return result;
  }

import static org.junit.Assert.assertThrows;

import com.google.common.collect.testing.MapTestSuiteBuilder;
import com.google.common.collect.testing.SampleElements;
import com.google.common.collect.testing.TestMapGenerator;
import com.google.common.collect.testing.features.CollectionFeature;
import com.google.common.collect.testing.features.CollectionSize;
import com.google.common.collect.testing.features.MapFeature;

import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

/**
 * Implementation helper for {@link TestMapGenerator} for use with enum maps.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestEnumMapGenerator implements TestMapGenerator<AnEnum, String> {

  @Override
  public SampleElements<Entry<AnEnum, String>> samples() {
    return new SampleElements<>(