Set<Set<Integer>> powerSet = powerSet(elements);
    assertEquals(1, powerSet.size());
    assertEquals(ImmutableSet.of(ImmutableSet.of()), powerSet);
    assertEquals(0, powerSet.hashCode());
  }

  public void testPowerSetContents() {
    ImmutableSet<Integer> elements = ImmutableSet.of(1, 2, 3);
    Set<Set<Integer>> powerSet = powerSet(elements);
    assertEquals(8, powerSet.size());

        return inputSet.keySet().containsAll(set);
      }
      return false;
    }

    @Override
    public boolean equals(@CheckForNull Object obj) {
      if (obj instanceof PowerSet) {
        PowerSet<?> that = (PowerSet<?>) obj;
        return inputSet.keySet().equals(that.inputSet.keySet());
      }
      return super.equals(obj);
    }

    @Override
    public int hashCode() {
      /*

  public void testContainsAll() {
    ImmutableSortedSet<Integer> set = ContiguousSet.create(Range.closed(1, 3), integers());
    for (Set<Integer> subset : Sets.powerSet(ImmutableSet.of(1, 2, 3))) {
      assertTrue(set.containsAll(subset));
    }
    for (Set<Integer> subset : Sets.powerSet(ImmutableSet.of(1, 2, 3))) {
      assertFalse(set.containsAll(Sets.union(subset, ImmutableSet.of(9))));
    }

  public void testContainsAll() {
    ImmutableSortedSet<Integer> set = ContiguousSet.create(Range.closed(1, 3), integers());
    for (Set<Integer> subset : Sets.powerSet(ImmutableSet.of(1, 2, 3))) {
      assertTrue(set.containsAll(subset));
    }
    for (Set<Integer> subset : Sets.powerSet(ImmutableSet.of(1, 2, 3))) {
      assertFalse(set.containsAll(Sets.union(subset, ImmutableSet.of(9))));
    }

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## Powered By

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DI Container
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Web Framework

私たちは、あなたの言語でのプルリクエストを歓迎します。

## Powered By

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DIコンテナ
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Webフレームワーク

  /** The HTTP {@code X-Frame-Options} header field name. */
  public static final String X_FRAME_OPTIONS = "X-Frame-Options";
  /** The HTTP {@code X-Powered-By} header field name. */
  public static final String X_POWERED_BY = "X-Powered-By";
  /**
   * The HTTP <a href="http://tools.ietf.org/html/draft-evans-palmer-key-pinning">{@code
   * Public-Key-Pins}</a> header field name.
   *
   * @since 15.0
   */

border-bottom-radius(0);\n  }\n\n  > .btn:not(:first-child),\n  > .btn-group:not(:first-child) > .btn {\n    @include border-top-radius(0);\n  }\n}\n\n\n// Checkbox and radio options\n//\n// In order to support the browser's form validation feedback, powered by the\n// `required` attribute, we have to \"hide\" the inputs via `clip`. We cannot use\n// `display: none;` or `visibility: hidden;` as that also hides the popover.\n// Simply visually hiding the inputs via `opacity` would leave them clickable...

border-bottom-radius(0);\n  }\n\n  > .btn:not(:first-child),\n  > .btn-group:not(:first-child) > .btn {\n    @include border-top-radius(0);\n  }\n}\n\n\n// Checkbox and radio options\n//\n// In order to support the browser's form validation feedback, powered by the\n// `required` attribute, we have to \"hide\" the inputs via `clip`. We cannot use\n// `display: none;` or `visibility: hidden;` as that also hides the popover.\n// Simply visually hiding the inputs via `opacity` would leave them clickable...