fun build(): Headers = commonBuild()
  }

  companion object {
    /** Empty headers. */
    @JvmField
    val EMPTY = Headers(emptyArray())

    /**
     * Returns headers for the alternating header names and values. There must be an even number of
     * arguments, and they must alternate between header names and values.
     */
    @JvmStatic
    @JvmName("of")

      headers.name(-1)
    }
    assertThat(headers.name(0)).isEqualTo("a")
    assertThat(headers.name(1)).isEqualTo("c")
    assertFailsWith<IndexOutOfBoundsException> {
      headers.name(2)
    }
  }

  @Test fun valueIndexesAreStrict() {
    val headers = headersOf("a", "b", "c", "d")
    assertFailsWith<IndexOutOfBoundsException> {
      headers.value(-1)
    }
    assertThat(headers.value(0)).isEqualTo("b")

      Headers
        .Builder()
        .addUnsafeNonAscii("héader1", "value1")
        .build()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected char 0xe9 at 1 in header name: héader1")
    }
  }

  @Test fun addUnsafeNonAsciiAcceptsUnicodeValue() {
    val headers =
      Headers
        .Builder()
        .addUnsafeNonAscii("header1", "valué1")
        .build()

    ): Builder = chunkedBody(Buffer().writeUtf8(body), maxChunkSize)

    /** Sets the headers and returns this. */
    public fun headers(headers: Headers): Builder =
      apply {
        this.headers_ = headers.newBuilder()
      }

    /** Sets the trailers and returns this. */
    public fun trailers(trailers: Headers): Builder =
      apply {
        this.trailers_ = trailers.newBuilder()
      }

  @Test fun basicChallenge() {
    val headers =
      Headers
        .Builder()
        .add("WWW-Authenticate: Basic realm=\"protected area\"")
        .build()
    assertThat(headers.parseChallenges("WWW-Authenticate"))
      .isEqualTo(listOf(Challenge("Basic", mapOf("realm" to "protected area"))))
  }

  @Test fun basicChallengeWithCharset() {
    val headers =
      Headers
        .Builder()

        return contentException;
    }

    /**
     * Sets the headers for the response.
     *
     * @param headers the headers to set.
     */
    public void setHeaders(final Map<String, List<String>> headers) {
        if (headers != null) {
            final Map<String, List<String>> map = new HashMap<>();
            headers.entrySet().stream().filter(e -> e.getKey() != null).forEach(

      }

    /** Removes all headers on this builder and adds [headers]. */
    open fun headers(headers: Headers) =
      apply {
        this.headers = headers.newBuilder()
      }

    /**
     * Sets this request's `Cache-Control` header, replacing any cache control headers already
     * present. If [cacheControl] doesn't define any directives, this clears this request's
     * cache-control headers.

    val body = "hello".toRequestBody()
    val headers = headersOf("User-Agent", "RequestTest")
    val method = "PUT"
    val request =
      Request(
        url = url,
        headers = headers,
        method = method,
        body = body,
      )
    assertThat(request.url).isEqualTo(url)
    assertThat(request.headers).isEqualTo(headers)
    assertThat(request.method).isEqualTo(method)

    val headers = headersOf("User-Agent", "RequestTest")
    val request =
      Request(
        url = url,
        headers = headers,
      )
    assertThat(request.url).isEqualTo(url)
    assertThat(request.headers).isEqualTo(headers)
    assertThat(request.method).isEqualTo("GET")
    assertThat(request.body).isNull()
    assertThat(request.tags).isEqualTo(EmptyTags)
  }

  @Test

    assertThat(recorded.headers["Connection"]).isEqualTo("Upgrade, HTTP2-Settings")
    if (PlatformVersion.majorVersion < 19) {
      assertThat(recorded.headers["Content-Length"]).isEqualTo("0")
    }
    assertThat(recorded.headers["HTTP2-Settings"]).isNotNull()
    assertThat(recorded.headers["Upgrade"]).isEqualTo("h2c") // HTTP/2 over plaintext!
    assertThat(recorded.headers["User-Agent"]!!).matches(Regex("Java-http-client/.*"))