}

  private EndpointPairIterator(BaseGraph<N> graph) {
    this.graph = graph;
    this.nodeIterator = graph.nodes().iterator();
  }

  /**
   * Called after {@link #successorIterator} is exhausted. Advances {@link #node} to the next node
   * and updates {@link #successorIterator} to iterate through the successors of {@link #node}.
   */
  final boolean advance() {
    checkState(!successorIterator.hasNext());

      var totalRuleBytes = 0
      var totalExceptionRuleBytes = 0

      fileSystem.source(publicSuffixListDotDat).buffer().use { source ->
        while (!source.exhausted()) {
          var rule: ByteString = source.readUtf8LineStrict().toRule() ?: continue

          if (rule.startsWith(EXCEPTION_RULE_MARKER)) {
            rule = rule.substring(1)

        }
        is SocketException -> {
          // Conscrypt, JDK 8 (>= 292), JDK 9
        }
        else -> {
          assertThat(expected.message).isEqualTo("exhausted all routes")
        }
      }
    }
  }

  @Test
  fun commonNameIsNotTrusted() {
    serverCert =
      HeldCertificate.Builder()
        .signedBy(serverIntermediateCa)

        @Override public long read(Buffer sink, long byteCount) throws IOException {
          long bytesRead = super.read(sink, byteCount);
          // read() returns the number of bytes read, or -1 if this source is exhausted.
          totalBytesRead += bytesRead != -1 ? bytesRead : 0;
          progressListener.update(totalBytesRead, responseBody.contentLength(), bytesRead == -1);
          return bytesRead;
        }
      };
    }

  fun setChunkedBody(
    body: Buffer,
    maxChunkSize: Int,
  ) = apply {
    removeHeader("Content-Length")
    headersBuilder.add(CHUNKED_BODY_HEADER)

    val bytesOut = Buffer()
    while (!body.exhausted()) {
      val chunkSize = minOf(body.size, maxChunkSize.toLong())
      bytesOut.writeHexadecimalUnsignedLong(chunkSize)
      bytesOut.writeUtf8("\r\n")
      bytesOut.write(body, chunkSize)

 * returns the same bytes as the upstream source. Downstream sources may read data either as it
 * is returned by upstream, or after the upstream source has been exhausted.
 *
 * As bytes are returned from upstream they are written to a local file. Downstream sources read
 * from this file as necessary.
 *

      assertTrue(
          "index " + i + " expected <" + expected + "., actual is exhausted",
          actualIterator.hasNext());

      Object actual = actualIterator.next();
      assertEquals("index " + i, expected, actual);
      i++;
    }
    if (actualIterator.hasNext()) {
      fail("index " + i + ", expected is exhausted, actual <" + actualIterator.next() + ">");
    }
  }

  /**

      GzipSource(resource).buffer().use { source ->
        val length = source.readInt()
        buffer.write(source, length.toLong())
      }
    }
    while (!buffer.exhausted()) {
      var publicSuffix = buffer.readUtf8LineStrict()
      if (publicSuffix.contains("*")) {
        // A wildcard rule, let's replace the wildcard with a value.

  fun sourceEmpty() {
    val mediaType = if (null == null) null else "any/thing; charset=${null}".toMediaType()
    val body = "".decodeHex().toResponseBody(mediaType)
    val source = body.source()
    assertThat(source.exhausted()).isTrue()
    assertThat(source.readUtf8()).isEqualTo("")
  }

  @Test
  fun sourceClosesUnderlyingSource() {
    var closed = false

    val body: ResponseBody =
      object : ResponseBody() {

      assertTrue(
          "index " + i + " expected <" + expected + "., actual is exhausted",
          actualIterator.hasNext());

      Object actual = actualIterator.next();
      assertEquals("index " + i, expected, actual);
      i++;
    }
    if (actualIterator.hasNext()) {
      fail("index " + i + ", expected is exhausted, actual <" + actualIterator.next() + ">");
    }
  }

  /**