private final File file;
    private final String resourceName;

    final ClassLoader loader;

    static ResourceInfo of(File file, String resourceName, ClassLoader loader) {
      if (resourceName.endsWith(CLASS_FILE_NAME_EXTENSION)) {
        return new ClassInfo(file, resourceName, loader);
      } else {
        return new ResourceInfo(file, resourceName, loader);
      }
    }

  }

  public void testImmediateFailedFuture() throws Exception {
    Exception exception = new Exception();
    ListenableFuture<String> future = immediateFailedFuture(exception);
    assertThat(future.toString()).endsWith("[status=FAILURE, cause=[" + exception + "]]");

    try {
      getDone(future);
      fail();
    } catch (ExecutionException expected) {
      assertSame(exception, expected.getCause());
    }

    // Normalize:
    // * ASCII characters to lowercase
    // * All dot-like characters to '.'
    // * Strip trailing '.'

    name = Ascii.toLowerCase(DOTS_MATCHER.replaceFrom(name, '.'));

    if (name.endsWith(".")) {
      name = name.substring(0, name.length() - 1);
    }

    checkArgument(name.length() <= MAX_LENGTH, "Domain name too long: '%s':", name);
    this.name = name;

    checkNotNull(hostAddr);

    // Decide if this should be an IPv6 or IPv4 address.
    String ipString;
    int expectBytes;
    if (hostAddr.startsWith("[") && hostAddr.endsWith("]")) {
      ipString = hostAddr.substring(1, hostAddr.length() - 1);
      expectBytes = 16;
    } else {
      ipString = hostAddr;
      expectBytes = 4;
    }

  }

  public void testImmediateFailedFuture() throws Exception {
    Exception exception = new Exception();
    ListenableFuture<String> future = immediateFailedFuture(exception);
    assertThat(future.toString()).endsWith("[status=FAILURE, cause=[" + exception + "]]");

    try {
      getDone(future);
      fail();
    } catch (ExecutionException expected) {
      assertSame(exception, expected.getCause());
    }

      int negatedCharacters = DISTINCT_CHARS - totalCharacters;
      String suffix = ".negate()";
      final String description = toString();
      String negatedDescription =
          description.endsWith(suffix)
              ? description.substring(0, description.length() - suffix.length())
              : description + suffix;
      return new NegatedFastMatcher(

      int negatedCharacters = DISTINCT_CHARS - totalCharacters;
      String suffix = ".negate()";
      final String description = toString();
      String negatedDescription =
          description.endsWith(suffix)
              ? description.substring(0, description.length() - suffix.length())
              : description + suffix;
      return new NegatedFastMatcher(

        throw new FileNotFoundException(finalizerPath);
      }

      // Find URL pointing to base of class path.
      String urlString = finalizerUrl.toString();
      if (!urlString.endsWith(finalizerPath)) {
        throw new IOException("Unsupported path style: " + urlString);
      }
      urlString = urlString.substring(0, urlString.length() - finalizerPath.length());

        throw new FileNotFoundException(finalizerPath);
      }

      // Find URL pointing to base of class path.
      String urlString = finalizerUrl.toString();
      if (!urlString.endsWith(finalizerPath)) {
        throw new IOException("Unsupported path style: " + urlString);
      }
      urlString = urlString.substring(0, urlString.length() - finalizerPath.length());

    abstract Optional<String> chop(String str);

    static Chopper suffix(String suffix) {
      return new Chopper() {
        @Override
        Optional<String> chop(String str) {
          if (str.endsWith(suffix)) {
            return Optional.of(str.substring(0, str.length() - suffix.length()));
          } else {
            return Optional.absent();
          }
        }
      };
    }
  }