assertThat(letters).containsExactly("a", "b", "c", "d").inOrder();
  }

  public void testFixedLengthSplitZeroChunkLen() {
    assertThrows(IllegalArgumentException.class, () -> Splitter.fixedLength(0));
  }

  public void testFixedLengthSplitNegativeChunkLen() {
    assertThrows(IllegalArgumentException.class, () -> Splitter.fixedLength(-1));
  }

  public void testLimitLarge() {

  /**
   * Returns a splitter that divides strings into pieces of the given length. For example, {@code
   * Splitter.fixedLength(2).split("abcde")} returns an iterable containing {@code ["ab", "cd",
   * "e"]}. The last piece can be smaller than {@code length} but will never be empty.
   *
   * <p><b>Note:</b> if {@link #fixedLength} is used in conjunction with {@link #limit}, the final

      for (String separator : ImmutableList.of(",", "\n", ";;", "")) {
        testEncoding(
            encoding.withSeparator(separator, sepLength),
            decoded,
            Joiner.on(separator).join(Splitter.fixedLength(sepLength).split(encoded)));
      }
    }
  }

  private static void testEncoding(BaseEncoding encoding, String decoded, String encoded) {
    testEncodes(encoding, decoded, encoded);

      for (String separator : ImmutableList.of(",", "\n", ";;", "")) {
        testEncoding(
            encoding.withSeparator(separator, sepLength),
            decoded,
            Joiner.on(separator).join(Splitter.fixedLength(sepLength).split(encoded)));
      }
    }
  }

  private static void testEncoding(BaseEncoding encoding, String decoded, String encoded) {
    testEncodes(encoding, decoded, encoded);

  }

  @Test
  fun fixedLengthUpload_byteByByte() {
    doUpload(TransferKind.FIXED_LENGTH, WriteKind.BYTE_BY_BYTE)
  }

  @Test
  fun fixedLengthUpload_smallBuffers() {
    doUpload(TransferKind.FIXED_LENGTH, WriteKind.SMALL_BUFFERS)
  }

  @Test
  fun fixedLengthUpload_largeBuffers() {
    doUpload(TransferKind.FIXED_LENGTH, WriteKind.LARGE_BUFFERS)
  }

  private fun doUpload(

    server.shutdown() // tearDown() isn't sufficient; this test starts multiple servers
  }

  @Test
  fun responseCachingAndInputStreamSkipWithFixedLength() {
    testResponseCaching(TransferKind.FIXED_LENGTH)
  }

  @Test
  fun responseCachingAndInputStreamSkipWithChunkedEncoding() {
    testResponseCaching(TransferKind.CHUNKED)
  }

  @Test