Iterator<String> iterator = emptyIterator();
    Multiset<String> multiset = ImmutableMultiset.copyOf(iterator);
    assertTrue(multiset.isEmpty());
  }

  public void testCopyOf_iterator_oneElement() {
    Iterator<String> iterator = singletonIterator("a");
    Multiset<String> multiset = ImmutableMultiset.copyOf(iterator);
    assertEquals(HashMultiset.create(asList("a")), multiset);
  }

    Iterator<String> iterator = emptyIterator();
    Set<String> set = copyOf(iterator);
    assertEquals(Collections.<String>emptySet(), set);
    assertSame(this.<String>of(), set);
  }

  public void testCopyOf_iterator_oneElement() {
    Iterator<String> iterator = singletonIterator("a");
    Set<String> set = copyOf(iterator);
    assertEquals(singleton("a"), set);
  }

  public void testCopyOf_iterator_oneElementRepeated() {

    Iterator<String> iterator = emptyIterator();
    Multiset<String> multiset = ImmutableMultiset.copyOf(iterator);
    assertTrue(multiset.isEmpty());
  }

  public void testCopyOf_iterator_oneElement() {
    Iterator<String> iterator = singletonIterator("a");
    Multiset<String> multiset = ImmutableMultiset.copyOf(iterator);
    assertEquals(HashMultiset.create(asList("a")), multiset);
  }

  public void testCopyOf_iterator_empty() {
    Iterator<String> iterator = emptyIterator();
    List<String> list = ImmutableList.copyOf(iterator);
    assertEquals(emptyList(), list);
  }

  public void testCopyOf_iterator_oneElement() {
    Iterator<String> iterator = singletonIterator("a");
    List<String> list = ImmutableList.copyOf(iterator);
    assertEquals(singletonList("a"), list);
  }

  public void testCopyOf_iterator_empty() {
    Iterator<String> iterator = emptyIterator();
    List<String> list = ImmutableList.copyOf(iterator);
    assertEquals(emptyList(), list);
  }

  public void testCopyOf_iterator_oneElement() {
    Iterator<String> iterator = singletonIterator("a");
    List<String> list = ImmutableList.copyOf(iterator);
    assertEquals(singletonList("a"), list);
  }