Reader reader = new StringReader(ASCII);
    assertEquals(ASCII.length(), CharStreams.exhaust(reader));
    assertEquals(-1, reader.read());
    assertEquals(0, CharStreams.exhaust(reader));

    Reader empty = new StringReader("");
    assertEquals(0, CharStreams.exhaust(empty));
    assertEquals(-1, empty.read());
  }

  public void testExhaust_readable() throws IOException {

    Reader reader = new StringReader(ASCII);
    assertEquals(ASCII.length(), CharStreams.exhaust(reader));
    assertEquals(-1, reader.read());
    assertEquals(0, CharStreams.exhaust(reader));

    Reader empty = new StringReader("");
    assertEquals(0, CharStreams.exhaust(empty));
    assertEquals(-1, empty.read());
  }

  public void testExhaust_readable() throws IOException {

   * Returns the total number of chars read. Does not close the stream.
   *
   * @since 20.0
   */
  @CanIgnoreReturnValue
  public static long exhaust(Readable readable) throws IOException {
    long total = 0;
    long read;
    CharBuffer buf = createBuffer();
    while ((read = readable.read(buf)) != -1) {
      total += read;

      timeout().deadlineNanoTime(nowNs + originalDurationNs)
    }
  }
}

@Throws(IOException::class)
internal fun BufferedSource.skipAll() {
  while (!exhausted()) {
    skip(buffer.size)
  }
}

/**
 * Attempts to exhaust this, returning true if successful. This is useful when reading a complete
 * source is helpful, such as when doing so completes a cache body or frees a socket connection for
 * reuse.
 */

        // See https://github.com/google/guava/issues/3542
        Reader reader = new StringReader(cannotDecode);
        InputStream decodingStream = encoding.decodingStream(reader);
        try {
          ByteStreams.exhaust(decodingStream);
          fail("Expected DecodingException");
        } catch (DecodingException expected) {
          // Don't assert on the expectedMessage; the messages for exceptions thrown from the

        // See https://github.com/google/guava/issues/3542
        Reader reader = new StringReader(cannotDecode);
        InputStream decodingStream = encoding.decodingStream(reader);
        try {
          ByteStreams.exhaust(decodingStream);
          fail("Expected DecodingException");
        } catch (DecodingException expected) {
          // Don't assert on the expectedMessage; the messages for exceptions thrown from the

        .url(server.url("/"))
        .method(method, null)
        .build()
    val response = client.newCall(request).execute()
    assertThat(response.code).isEqualTo(expectedResponseCode)

    // Exhaust the content stream.
    response.body.string()
    val cached = cacheGet(cache, request)
    if (shouldWriteToCache) {
      assertThat(cached).isNotNull()
      cached!!.body.close()
    } else {

   * reached. Returns the total number of bytes read. Does not close the stream.
   *
   * @since 20.0
   */
  @CanIgnoreReturnValue
  public static long exhaust(InputStream in) throws IOException {
    long total = 0;
    long read;
    byte[] buf = createBuffer();
    while ((read = in.read(buf)) != -1) {
      total += read;
    }
    return total;
  }

    apply {
      actions += { stream ->
        if (!stream.source.exhausted()) throw AssertionError("expected exhausted")
      }
    }

  fun cancelStream() =
    apply {
      actions += { stream -> stream.cancel() }
    }

  fun requestIOException() =
    apply {
      actions += { stream ->
        try {
          stream.source.exhausted()
          throw AssertionError("expected IOException")

    if (peek == null) {
      if (!exhausted()) return // Expected a token; got something else.
      result.add(Challenge(schemeName, emptyMap()))
      return
    }

    var eqCount = skipAll('='.code.toByte())
    val commaSuffixed = skipCommasAndWhitespace()

    // It's a token68 because there isn't a value after it.
    if (!commaPrefixed && (commaSuffixed || exhausted())) {
      result.add(
        Challenge(