// return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(ImmutableIntArray.of())
        .addEqualityGroup(
            ImmutableIntArray.of(1, 2),
            reserialize(ImmutableIntArray.of(1, 2)),

    Set<Entry<String, Integer>> entrySet = map.entrySet();
    assertTrue(entrySet instanceof SynchronizedSet);
    assertThat(((SynchronizedSet<?>) entrySet).mutex).isSameInstanceAs(mutex);
  }

  public void testEquals() {
    boolean unused = create().equals(new HashMap<String, Integer>());
  }

  public void testHashCode() {
    int unused = create().hashCode();
  }

  public void testToString() {

    new EqualsTester()
        .addEqualityGroup(hpNoPort1, hpNoPort2, hpNoPort3, hpNoPort4, hpNoPort5)
        .addEqualityGroup(hpWithPort1, hpWithPort2, hpWithPort3)
        .testEquals();
  }

  public void testRequireBracketsForIPv6() {
    // Bracketed IPv6 works fine.
    assertThat(HostAndPort.fromString("[::1]").requireBracketsForIPv6().getHost()).isEqualTo("::1");

        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("?", "user", "password");
        assertEquals("user", auth.getName());
    }

    // Test equals method
    @Test
    void testEquals() {
        NtlmPasswordAuthentication auth1 = new NtlmPasswordAuthentication("DOMAIN", "user", "password");
        NtlmPasswordAuthentication auth2 = new NtlmPasswordAuthentication("DOMAIN", "user", "password");

    // return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(ImmutableDoubleArray.of())
        .addEqualityGroup(
            ImmutableDoubleArray.of(1, 2),
            reserialize(ImmutableDoubleArray.of(1, 2)),

        .addEqualityGroup(Optional.of(Long.valueOf(5)), reserialize(Optional.of(Long.valueOf(5))))
        .addEqualityGroup(Optional.of(Long.valueOf(42)), reserialize(Optional.of(Long.valueOf(42))))
        .testEquals();
  }

  public void testToString_absent() {
    assertThat(Optional.absent().toString()).isEqualTo("Optional.absent()");
  }

  public void testToString_present() {

    // return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(ImmutableDoubleArray.of())
        .addEqualityGroup(
            ImmutableDoubleArray.of(1, 2),
            reserialize(ImmutableDoubleArray.of(1, 2)),

        assertEquals("3", false, StringUtil.contains("abc", "d"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testEquals() throws Exception {
        assertEquals("1", true, StringUtil.equals("a", "a"));
        assertEquals("2", true, StringUtil.equals(null, null));
        assertEquals("3", false, StringUtil.equals("a", null));

      new EqualsTester()
          .addEqualityGroup(builder.build(identityLoader()))
          .addEqualityGroup(builder.build(identityLoader()))
          .addEqualityGroup(builder.build(identityLoader()))
          .testEquals();
    }
  }

  public void testGet_null() throws ExecutionException {
    for (LoadingCache<Object, Object> cache : caches()) {
      assertThrows(NullPointerException.class, () -> cache.get(null));

    for (Integer node : graph.nodes()) {
      new EqualsTester()
          .addEqualityGroup(
              graph.predecessors(node), graph.successors(node), graph.adjacentNodes(node))
          .testEquals();
    }
  }

  @Override
  @Test
  public void nodes_checkReturnedSetMutability() {
    assume().that(graphIsMutable()).isTrue();

    Set<Integer> nodes = graph.nodes();