assertEquals(double.class, TypeToken.of(double[].class).getComponentType().getType());
    assertNull(TypeToken.of(Object.class).getComponentType());
    assertNull(TypeToken.of(void.class).getComponentType());
  }

  public <T> void testGetComponentType_genericArrayClasses() {
    assertNull(TypeToken.of(new TypeCapture<T>() {}.capture()).getComponentType());
    assertEquals(

    assertEquals(double.class, TypeToken.of(double[].class).getComponentType().getType());
    assertNull(TypeToken.of(Object.class).getComponentType());
    assertNull(TypeToken.of(void.class).getComponentType());
  }

  public <T> void testGetComponentType_genericArrayClasses() {
    assertNull(TypeToken.of(new TypeCapture<T>() {}.capture()).getComponentType());
    assertEquals(

    assertEquals("bar", getOnlyElement(iterator, "bar"));
  }

  public void testGetOnlyElement_withDefault_empty_null() {
    Iterator<String> iterator = emptyIterator();
    assertNull(Iterators.<@Nullable String>getOnlyElement(iterator, null));
  }

  public void testGetOnlyElement_withDefault_two() {
    Iterator<String> iterator = asList("foo", "bar").iterator();

    assertEquals("bar", getOnlyElement(iterator, "bar"));
  }

  public void testGetOnlyElement_withDefault_empty_null() {
    Iterator<String> iterator = emptyIterator();
    assertNull(Iterators.<@Nullable String>getOnlyElement(iterator, null));
  }

  public void testGetOnlyElement_withDefault_two() {
    Iterator<String> iterator = asList("foo", "bar").iterator();

    for (Entry<Object, Object> entry : result.entrySet()) {
      Object key = entry.getKey();
      Object value = entry.getValue();
      assertSame(value, result.get(key));
      assertNull(result.get(value));
      assertSame(value, cache.asMap().get(key));
      assertSame(key, cache.asMap().get(value));
    }
  }

  public void testBulkLoad_clobber() throws ExecutionException {