List<String> mutableList = Lists.newArrayList("789", "123");
    Iterable<Long> convertedValues = STR_TO_LONG.convertAll(mutableList);
    assertEquals(ImmutableList.of(789L, 123L), ImmutableList.copyOf(convertedValues));

    Iterator<Long> iterator = convertedValues.iterator();
    iterator.next();
    iterator.remove();
    assertEquals(ImmutableList.of("123"), mutableList);
  }

  public void testReverse() {

      assertNullsThrowException(Funnels.stringFunnel(charset));
    }
  }

  public void testForInts() {
    Integer value = 1234;
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    Funnels.integerFunnel().funnel(value, primitiveSink);
    verify(primitiveSink).putInt(1234);
  }

  public void testForInts_null() {
    assertNullsThrowException(Funnels.integerFunnel());
  }

  public void testForLongs() {

  private static final Iterable<Integer> ITERABLE_1 = Arrays.asList(1);
  private static final Iterable<Integer> ITERABLE_12 = Arrays.asList(1, 2);
  private static final Iterable<Integer> ITERABLE_123 = Arrays.asList(1, 2, 3);
  private static final Iterable<@Nullable Integer> ITERABLE_NULL = Arrays.asList((Integer) null);
  private static final Iterable<@Nullable Integer> ITERABLE_NULL_NULL =

  }

  private Iterable<BinaryNode> view;

  @Param Topology topology;

  @Param({"1", "100", "10000", "1000000"})
  int size;

  @Param Traversal traversal;

  @Param({"1234"})
  SpecialRandom rng;

  @BeforeExperiment
  void setUp() {
    this.view = traversal.view(topology.createTree(size, rng).get(), VIEWER);
  }

  @Benchmark
  int traversal(int reps) {

    assertThat(join(1)).isEqualTo("1");
    assertThat(join(1, 2)).isEqualTo("1,2");
    assertThat(join(-1, Integer.MIN_VALUE)).isEqualTo("4294967295,2147483648");

    assertThat(UnsignedInts.join("", 1, 2, 3)).isEqualTo("123");
  }

  private static String join(int... values) {
    return UnsignedInts.join(",", values);
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNulls() {

          "abc.a23",
          "biz.com.ua",
          "x",
          "fOo",
          "f--o",
          "f_a",
          "foo.net.us\uFF61ocm",
          "woo.com.",
          "8server.shop",
          "123.cn",
          "a" + DELTA + "b.com",
          ALMOST_TOO_MANY_LEVELS,
          ALMOST_TOO_LONG);

  private static final ImmutableSet<String> INVALID_NAME =
      ImmutableSet.of(
          "",
          " ",

        AtomicDouble.class);
  }

  @SuppressWarnings("unchecked") // functor classes have no type parameters
  public void testGet_functors() {
    assertEquals(0, ArbitraryInstances.get(Comparator.class).compare("abc", 123));
    assertTrue(ArbitraryInstances.get(Predicate.class).apply("abc"));
    assertTrue(ArbitraryInstances.get(Equivalence.class).equivalent(1, 1));
    assertFalse(ArbitraryInstances.get(Equivalence.class).equivalent(1, 2));

    assertThat(Shorts.join(",", ARRAY1)).isEqualTo("1");
    assertThat(Shorts.join(",", (short) 1, (short) 2)).isEqualTo("1,2");
    assertThat(Shorts.join("", (short) 1, (short) 2, (short) 3)).isEqualTo("123");
  }

  public void testLexicographicalComparator() {
    List<short[]> ordered =
        Arrays.asList(
            new short[] {},
            new short[] {LEAST},
            new short[] {LEAST, LEAST},

   * com...ExampleStackTrace: LockB -> LockC
   *   at com...CycleDetectingReentrantLock.lock(CycleDetectingLockFactory.java:443)
   *   at ...
   *   at ...
   *   at com...MyClass.someMethodThatAcquiresLockB(MyClass.java:123)
   * </pre>
   */
  private static class ExampleStackTrace extends IllegalStateException {

    static final StackTraceElement[] EMPTY_STACK_TRACE = new StackTraceElement[0];

          (Converter<String, Integer>) getDefaultParameterValue(0);
      assertEquals(Integer.valueOf(0), defaultConverter.convert("anything"));
      assertEquals("", defaultConverter.reverse().convert(123));
      assertNull(defaultConverter.convert(null));
      assertNull(defaultConverter.reverse().convert(null));
    }
  }

  public void testConverterDefaultValue() {