builder.networkInterceptors().addAll(listOf(null) as List<Interceptor>)
    assertFailsWith<IllegalStateException> {
      builder.build()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Null network interceptor: [null]")
    }
  }

  @Test fun testH2PriorKnowledgeOkHttpClientConstructionFallback() {
    assertFailsWith<IllegalArgumentException> {
      OkHttpClient
        .Builder()

      assertThat(source.readUtf8(halfResponseBody.length.toLong())).isEqualTo(halfResponseBody)
      source.close()
      assertFailsWith<IllegalStateException> {
        source.readUtf8()
      }
      assertFailsWith<IOException> {
        response.peekTrailers()
      }
      assertFailsWith<IOException> {
        response.trailers()
      }
    }
  }

  private fun MockResponse.Builder.body(

  }

  @Test fun addThrowsOnEmptyName() {
    assertFailsWith<IllegalArgumentException> {
      Headers.Builder().add(": bar")
    }
    assertFailsWith<IllegalArgumentException> {
      Headers.Builder().add(" : bar")
    }
  }

  @Test fun addThrowsOnNoColon() {
    assertFailsWith<IllegalArgumentException> {
      Headers.Builder().add("foo bar")
    }
  }

import java.net.Proxy
import java.net.UnknownHostException
import java.time.Duration
import java.util.Arrays
import java.util.concurrent.CountDownLatch
import java.util.concurrent.TimeUnit
import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.SocketEffect.CloseSocket
import mockwebserver3.junit5.StartStop
import okhttp3.CallEvent.CallEnd

import java.net.HttpURLConnection
import java.time.Duration
import java.util.concurrent.CountDownLatch
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicReference
import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.TestUtil.repeat

    val builder = Request.Builder()
    assertFailsWith<IllegalArgumentException> {
      builder.header(s, "Value")
    }
    assertFailsWith<IllegalArgumentException> {
      builder.addHeader(s, "Value")
    }
    assertFailsWith<IllegalArgumentException> {
      builder.header("Name", s)
    }
    assertFailsWith<IllegalArgumentException> {
      builder.addHeader("Name", s)
    }
  }

  @Test
  fun cannotAccessAddressBeforeStart() {
    val other = MockWebServer()
    assertFailsWith<IllegalStateException> {
      other.socketAddress
    }
    assertFailsWith<IllegalStateException> {
      other.hostName
    }
    assertFailsWith<IllegalStateException> {
      other.port
    }
    assertFailsWith<IllegalStateException> {
      other.proxyAddress
    }
    other.use {

import java.util.concurrent.SynchronousQueue
import java.util.concurrent.ThreadPoolExecutor
import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicReference
import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.SocketEffect.ShutdownConnection
import mockwebserver3.junit5.StartStop
import okhttp3.MediaType.Companion.toMediaType

      MultipartReader(
        boundary = "simple boundary",
        source = Buffer().writeUtf8(multipart),
      )

    val part = parts.nextPart()!!
    assertFailsWith<EOFException> {
      part.body.readUtf8()
    }

    assertFailsWith<EOFException> {
      assertThat(parts.nextPart()).isNull()
    }
  }

  @Test fun `malformed headers`() {
    val multipart =
      """

 */
package okhttp3.coroutines

import assertk.assertThat
import assertk.assertions.isEqualTo
import assertk.assertions.isTrue
import java.io.IOException
import java.util.concurrent.TimeUnit
import kotlin.test.assertFailsWith
import kotlin.time.Duration.Companion.seconds
import kotlinx.coroutines.CancellationException
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.TimeoutCancellationException