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]");

    assertThrows(IllegalArgumentException.class, () -> HashCode.fromString("7"));
    HashCode unused = HashCode.fromString("7f");
  }

  public void testFromStringFailsWithOddLengthInput() {
    assertThrows(IllegalArgumentException.class, () -> HashCode.fromString("7f8"));
  }

  public void testIntWriteBytesTo() {
    byte[] dest = new byte[4];

    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]");

final class ParseRequest {
  final String rawValue;
  final int radix;

  private ParseRequest(String rawValue, int radix) {
    this.rawValue = rawValue;
    this.radix = radix;
  }

  static ParseRequest fromString(String stringValue) {
    if (stringValue.length() == 0) {
      throw new NumberFormatException("empty string");
    }

    // Handle radix specifier if present
    String rawValue;
    int radix;

   * Chain this call after {@link #fromString(String)} to increase the strictness of the parser, and
   * disallow IPv6 literals that don't contain these brackets.
   *
   * <p>Note that this parser identifies IPv6 literals solely based on the presence of a colon. To
   * perform actual validation of IP addresses, see the {@link InetAddresses#forString(String)}
   * method.
   *

    assertThrows(IllegalArgumentException.class, () -> HashCode.fromString("7"));
    HashCode unused = HashCode.fromString("7f");
  }

  public void testFromStringFailsWithOddLengthInput() {
    assertThrows(IllegalArgumentException.class, () -> HashCode.fromString("7f8"));
  }

  public void testIntWriteBytesTo() {
    byte[] dest = new byte[4];

        @Override
        public boolean canConvert(Class<?> type) {
            return Path.class.equals(type);
        }

        @Override
        protected Object fromString(String value) throws ComponentConfigurationException {
            return Paths.get(value.replace('/' == File.separatorChar ? '\\' : '/', File.separatorChar));
        }

        @Override

      if (views.contains("posix")) {
        filePermissions = () -> asFileAttribute(PosixFilePermissions.fromString("rw-------"));
        directoryPermissions = () -> asFileAttribute(PosixFilePermissions.fromString("rwx------"));
      } else if (views.contains("acl")) {
        filePermissions = directoryPermissions = userPermissions();
      } else {
        filePermissions =

    assertSame(value, cache.getUnchecked(key));
    assertEquals(0, cache.size());
    assertFalse(cache.asMap().containsKey(key));
  }

  public void testCacheBuilderFrom_string() {
    CacheBuilder<?, ?> fromString =
        CacheBuilder.from(
            "initialCapacity=10,maximumSize=20,concurrencyLevel=30,"
                + "weakKeys,weakValues,expireAfterAccess=10m");
    CacheBuilder<?, ?> expected =

   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.
    HostAndPort parsedHost = HostAndPort.fromString(specifier);
    Preconditions.checkArgument(!parsedHost.hasPort());
    String host = parsedHost.getHost();

    // Try to interpret the specifier as an IP address. Note we build