import junit.framework.Assert;
import junit.framework.AssertionFailedError;
import org.checkerframework.checker.nullness.qual.Nullable;

@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public class Helpers {
  // Clone of Objects.equal
  static boolean equal(@Nullable Object a, @Nullable Object b) {
    return a == b || (a != null && a.equals(b));
  }

  // Clone of Lists.newArrayList

    }

    private static final long serialVersionUID = 5;
  }

  public void testMutableValues() {
    IntHolder holderA = new IntHolder(1);
    IntHolder holderB = new IntHolder(2);
    Map<String, IntHolder> map = ImmutableSortedMap.of("a", holderA, "b", holderB);
    holderA.value = 3;
    assertTrue(map.entrySet().contains(Maps.immutableEntry("a", new IntHolder(3))));

    public SampleElements<Entry<Country, Currency>> samples() {
      return new SampleElements<>(
          Helpers.mapEntry(Country.CANADA, Currency.DOLLAR),
          Helpers.mapEntry(Country.CHILE, Currency.PESO),
          Helpers.mapEntry(Country.UK, Currency.POUND),
          Helpers.mapEntry(Country.JAPAN, Currency.YEN),
          Helpers.mapEntry(Country.SWITZERLAND, Currency.FRANC));
    }

    @SuppressWarnings("unchecked")
    @Override

    public SampleElements<Entry<Country, Currency>> samples() {
      return new SampleElements<>(
          Helpers.mapEntry(Country.CANADA, Currency.DOLLAR),
          Helpers.mapEntry(Country.CHILE, Currency.PESO),
          Helpers.mapEntry(Country.UK, Currency.POUND),
          Helpers.mapEntry(Country.JAPAN, Currency.YEN),
          Helpers.mapEntry(Country.SWITZERLAND, Currency.FRANC));
    }

    @SuppressWarnings("unchecked")
    @Override

                    return new SampleElements<>(
                        Helpers.mapEntry("a", (Collection<String>) ImmutableSortedSet.of("alex")),
                        Helpers.mapEntry(
                            "b", (Collection<String>) ImmutableSortedSet.of("bob", "bagel")),
                        Helpers.mapEntry(
                            "c", (Collection<String>) ImmutableSortedSet.of("carl", "carol")),

    if (test instanceof AbstractTester) {
      AbstractTester<?> tester = (AbstractTester<?>) test;
      return Helpers.getMethod(tester.getClass(), tester.getTestMethodName());
    } else if (test instanceof TestCase) {
      TestCase testCase = (TestCase) test;
      return Helpers.getMethod(testCase.getClass(), testCase.getName());
    } else {

 * limitations under the License.
 */

package com.google.common.collect.testing;

import static com.google.common.collect.testing.Helpers.castOrCopyToList;
import static com.google.common.collect.testing.Helpers.equal;
import static com.google.common.collect.testing.Helpers.mapEntry;
import static java.util.Collections.sort;

import com.google.common.annotations.GwtCompatible;
import java.util.ArrayList;

    // Now we don't care what order it's put the list in, only that
    // comparing any pair of elements gives the answer we expect.
    Helpers.testComparator(arbitrary, list);
  }

  public void testUsingToString() {
    Ordering<Object> ordering = Ordering.usingToString();
    Helpers.testComparator(ordering, 1, 12, 124, 2);
    assertEquals("Ordering.usingToString()", ordering.toString());

    // Now we don't care what order it's put the list in, only that
    // comparing any pair of elements gives the answer we expect.
    Helpers.testComparator(arbitrary, list);
  }

  public void testUsingToString() {
    Ordering<Object> ordering = Ordering.usingToString();
    Helpers.testComparator(ordering, 1, 12, 124, 2);
    assertEquals("Ordering.usingToString()", ordering.toString());

    }
    Set<Feature<?>> allPresentFeatures =
        addImpliedFeatures(Helpers.<Feature<?>>copyToSet(presentFeatures));
    Set<Feature<?>> allAbsentFeatures =
        addImpliedFeatures(Helpers.<Feature<?>>copyToSet(absentFeatures));
    if (!Collections.disjoint(allPresentFeatures, allAbsentFeatures)) {
      throw new ConflictingRequirementsException(