* NumberFormatException} if the input string is invalid.
   *
   * <p><b>Warning:</b> please see {@link Integer#decode} to understand exactly how strings are
   * parsed. For example, the string {@code "0123"} is treated as <i>octal</i> and converted to the
   * value {@code 83}.
   *
   * @since 16.0
   */
  public static Converter<String, Integer> stringConverter() {
    return IntConverter.INSTANCE;
  }

    assertEquals(80, HostAndPort.fromString("host:80").getPortOrDefault(123));
    assertEquals(123, HostAndPort.fromString("host").getPortOrDefault(123));
  }

  public void testHashCodeAndEquals() {
    HostAndPort hpNoPort1 = HostAndPort.fromString("foo::123");
    HostAndPort hpNoPort2 = HostAndPort.fromString("foo::123");
    HostAndPort hpNoPort3 = HostAndPort.fromString("[foo::123]");
    HostAndPort hpNoPort4 = HostAndPort.fromHost("[foo::123]");

                (byte) 0x67, (byte) 0x45, (byte) 0x23, (byte) 0x01
              },
              0x89abcdef,
              0x0123456789abcdefL,
              "efcdab8967452301"),
          new ExpectedHashCode(
              new byte[] {
                (byte) 0xef, (byte) 0xcd, (byte) 0xab, (byte) 0x89,
                (byte) 0x67, (byte) 0x45, (byte) 0x23,
                    (byte) 0x01, // up to here, same bytes as above

    assertThat(SignedBytes.join(",", ARRAY1)).isEqualTo("1");
    assertThat(SignedBytes.join(",", (byte) 1, (byte) 2)).isEqualTo("1,2");
    assertThat(SignedBytes.join("", (byte) 1, (byte) 2, (byte) 3)).isEqualTo("123");
    assertThat(SignedBytes.join(",", (byte) -128, (byte) -1)).isEqualTo("-128,-1");
  }

  @J2ktIncompatible // b/285319375
  public void testLexicographicalComparator() {
    List<byte[]> ordered =

  }

  @GwtIncompatible // DoubleMath.log2(double, RoundingMode)
  public void testRoundLog2Half() {
    // We don't expect perfect rounding accuracy.
    for (int exp : asList(-1022, -50, -1, 0, 1, 2, 3, 4, 100, 1022, 1023)) {
      for (RoundingMode mode : asList(HALF_EVEN, HALF_UP, HALF_DOWN)) {
        double x = Math.scalb(Math.sqrt(2) + 0.001, exp);
        double y = Math.scalb(Math.sqrt(2) - 0.001, exp);
        if (exp < 0) {

    assertThat(UnsignedLongs.join(",", -1, Long.MIN_VALUE))
        .isEqualTo("18446744073709551615,9223372036854775808");
    assertThat(UnsignedLongs.join("", 1, 2, 3)).isEqualTo("123");
    assertThat(UnsignedLongs.join("", -1, Long.MIN_VALUE))
        .isEqualTo("184467440737095516159223372036854775808");
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester

    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() {

    assertThat(Longs.join(",", ARRAY1)).isEqualTo("1");
    assertThat(Longs.join(",", (long) 1, (long) 2)).isEqualTo("1,2");
    assertThat(Longs.join("", (long) 1, (long) 2, (long) 3)).isEqualTo("123");
  }

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

    assertThat(Longs.join(",", ARRAY1)).isEqualTo("1");
    assertThat(Longs.join(",", (long) 1, (long) 2)).isEqualTo("1,2");
    assertThat(Longs.join("", (long) 1, (long) 2, (long) 3)).isEqualTo("123");
  }

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

    LocalLoadingCache<Object, Object> one =
        (LocalLoadingCache)
            CacheBuilder.newBuilder()
                .weakKeys()
                .softValues()
                .expireAfterAccess(123, SECONDS)
                .expireAfterWrite(456, MINUTES)
                .maximumWeight(789)
                .weigher(weigher)
                .concurrencyLevel(12)
                .removalListener(listener)