Iterator<String> unfiltered = Lists.newArrayList("foo", "bar").iterator();
    Iterator<String> filtered = filter(unfiltered, equalTo("foo"));
    List<String> expected = singletonList("foo");
    List<String> actual = Lists.newArrayList(filtered);
    assertEquals(expected, actual);
  }

  public void testFilterNoMatch() {
    Iterator<String> unfiltered = Lists.newArrayList("foo", "bar").iterator();

    val url = parse("http://host/?foo[]=1&foo[]=2&foo[]=3")
    assertThat(url.querySize).isEqualTo(3)
    assertThat(url.queryParameterNames).isEqualTo(setOf("foo[]"))
    assertThat(url.queryParameterValue(0)).isEqualTo("1")
    assertThat(url.queryParameterValue(1)).isEqualTo("2")
    assertThat(url.queryParameterValue(2)).isEqualTo("3")
    assertThat(url.queryParameterValues("foo[]")).containsExactly("1", "2", "3")
  }

    Iterator<String> unfiltered = Lists.newArrayList("foo", "bar").iterator();
    Iterator<String> filtered = filter(unfiltered, equalTo("foo"));
    List<String> expected = singletonList("foo");
    List<String> actual = Lists.newArrayList(filtered);
    assertEquals(expected, actual);
  }

  public void testFilterNoMatch() {
    Iterator<String> unfiltered = Lists.newArrayList("foo", "bar").iterator();

      PushPromise(
        "GET",
        "/foo/bar",
        headersOf("foo", "bar"),
        MockResponse(body = "bar"),
      )
    server.enqueue(
      MockResponse
        .Builder()
        .body("ABCDE")
        .addPush(pushPromise)
        .build(),
    )
    val call = client.newCall(Request(server.url("/foo")))
    val response = call.execute()

  }

  @Test
  fun noConnectionFoundOnFollowUp() {
    server.enqueue(
      MockResponse
        .Builder()
        .code(301)
        .addHeader("Location", "/foo")
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .body("ABC")
        .build(),
    )
    val call =
      client.newCall(
        Request

     * LF<? extends @Nullable V>. That might be better: There's currently no difference between the
     * outputs users get when calling this with <Foo> and calling it with <@Nullable Foo>. The only
     * difference is that calling it with <Foo> won't work when an input Future has a @Nullable
     * type. So why even make that error possible by giving callers the choice?
     *

   *   Iterator<E> it = set.iterator();
   *   while (it.hasNext()) {
   *     foo(it.next());
   *   }
   * }
   * }
   *
   * <p>or:
   *
   * {@snippet :
   * NavigableSet<E> set = synchronizedNavigableSet(new TreeSet<E>());
   * NavigableSet<E> set2 = set.descendingSet().headSet(foo);
   *  ...
   * synchronized (set) { // Note: set, not set2!!!

                closer.eventuallyClose(autoCloseable, closingExecutor);
                return "foo";
              }
            },
            executor);
    assertThat(getFinalValue(closingFuture)).isEqualTo("foo");
    waitUntilClosed(closingFuture);
    assertClosed(closeable1);
  }

  public void testStatusFuture() throws Exception {

    peer.play()

    // Play it back.
    val connection = connect(peer)
    val stream = connection.newStream(headerEntries("a", "android"), true)
    stream.enqueueTrailers(headersOf("foo", "bar"))
    val sink = stream.sink.buffer()
    sink.writeUtf8("abcdefghi")
    sink.close()

    // Verify the peer received what was expected.
    val headers1 = peer.takeFrame()

          public String load(String key) throws InterruptedException {
            callCount.incrementAndGet();
            secondSignal.countDown();
            computeSignal.await();
            return key + "foo";
          }
        };

    LoadingCache<String, String> cache =
        CacheBuilder.newBuilder().weakKeys().build(computeFunction);