@MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutDuplicateValuePreservesSize() {
    assertFalse(multimap().put(k0(), v0()));
    assertEquals(getNumElements(), multimap().size());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

  @AndroidIncompatible // no FpUtils and no Math.nextDown in old versions
  public void testNextDown() throws Exception {
    Method jdkNextDown = getJdkNextDown();
    for (double d : FINITE_DOUBLE_CANDIDATES) {
      assertEquals(jdkNextDown.invoke(null, d), DoubleUtils.nextDown(d));
    }
  }

  private static Method getJdkNextDown() throws Exception {
    try {
      return Math.class.getMethod("nextDown", double.class);

    assertEscaping(e, "%7E", '~');
    assertEscaping(e, "%27", '\'');

    // Plus for spaces
    assertEscaping(e, "+", ' ');
    assertEscaping(e, "%2B", '+');

    assertEquals("safe+with+spaces", e.escape("safe with spaces"));
    assertEquals("foo%40bar.com", e.escape("******@****.***"));
  }

  public void testUrlPathSegmentEscaper() {
    UnicodeEscaper e = (UnicodeEscaper) urlPathSegmentEscaper();
    assertPathEscaper(e);

import org.apache.maven.project.MavenProject;
import org.apache.maven.project.inheritance.AbstractProjectInheritanceTestCase;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**

  public void testInverseSerialization() {
    BiMapPair<K, V> pair = new BiMapPair<>(getMap());
    BiMapPair<K, V> copy = SerializableTester.reserialize(pair);
    assertEquals(pair.forward, copy.forward);
    assertEquals(pair.backward, copy.backward);
    assertSame(copy.backward, copy.forward.inverse());
    assertSame(copy.forward, copy.backward.inverse());
  }

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class CollectionSizeTester<E> extends AbstractCollectionTester<E> {
  public void testSize() {
    assertEquals("size():", getNumElements(), collection.size());
  }

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapSizeTester<K, V> extends AbstractMapTester<K, V> {
  public void testSize() {
    assertEquals("size():", getNumElements(), getMap().size());
  }

    Set<Multiset.Entry<E>> expected = getMultiset().entrySet();
    assertEquals(expected, SerializableTester.reserialize(expected));
  }

  @CollectionFeature.Require(SERIALIZABLE_INCLUDING_VIEWS)
  public void testElementSetSerialization() {
    Set<E> expected = getMultiset().elementSet();
    assertEquals(expected, SerializableTester.reserialize(expected));
  }

            holder.set(str);
            deliveries.incrementAndGet();
          }
        });

    String EVENT = "Hello!";
    bus.post(EVENT);

    assertEquals("Only one event should be delivered.", 1, deliveries.get());
    assertEquals("Correct string should be delivered.", EVENT, holder.get());
  }

    Set<Multiset.Entry<E>> expected = getMultiset().entrySet();
    assertEquals(expected, SerializableTester.reserialize(expected));
  }

  @CollectionFeature.Require(SERIALIZABLE_INCLUDING_VIEWS)
  public void testElementSetSerialization() {
    Set<E> expected = getMultiset().elementSet();
    assertEquals(expected, SerializableTester.reserialize(expected));
  }