}

  @Test
  fun stringWithDefaultCharsetAdded() {
    val contentType = "text/plain".toMediaType()
    val body = "\u0800".toRequestBody(contentType)
    assertThat(body.contentType()).isEqualTo("text/plain; charset=utf-8".toMediaType())
    assertThat(body.contentLength()).isEqualTo(3)
    assertThat(bodyToHex(body)).isEqualTo("e0a080")
  }

  @Test

    requestBodySuccess(
      "Hello".toRequestBody("text/plain".toMediaType()),
      CoreMatchers.equalTo(5L),
      CoreMatchers.equalTo(19L),
    )
  }

  @Test
  fun requestBodySuccessHttp() {
    requestBodySuccess(
      "Hello".toRequestBody("text/plain".toMediaType()),
      CoreMatchers.equalTo(5L),
      CoreMatchers.equalTo(19L),
    )
  }

    responseBody.close()
    responseBody = "".toResponseBody("".toMediaType())
    responseBody = "".toResponseBody(null)
    responseBody = ByteString.EMPTY.toResponseBody("".toMediaType())
    responseBody = ByteString.EMPTY.toResponseBody(null)
    responseBody = byteArrayOf(0, 1).toResponseBody("".toMediaType())
    responseBody = byteArrayOf(0, 1).toResponseBody(null)

import okhttp3.CertificatePinner.Companion.pin
import okhttp3.Credentials.basic
import okhttp3.Headers.Companion.headersOf
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.TestUtil.assumeNotWindows
import okhttp3.TestUtil.awaitGarbageCollection

      try {
        toMediaType()
      } catch (_: IllegalArgumentException) {
        null
      }

    @JvmName("-deprecated_get")
    @Deprecated(
      message = "moved to extension function",
      replaceWith =
        ReplaceWith(
          expression = "mediaType.toMediaType()",
          imports = ["okhttp3.MediaType.Companion.toMediaType"],
        ),

          println(response.body!!.string())
        }
      }

      companion object {
        val MEDIA_TYPE_MARKDOWN = "text/x-markdown; charset=utf-8".toMediaType()
      }
    ```
=== ":material-language-java: Java"
    ```java
      public static final MediaType MEDIA_TYPE_MARKDOWN
          = MediaType.parse("text/x-markdown; charset=utf-8");

import mockwebserver3.SocketEffect.CloseSocket
import mockwebserver3.SocketEffect.ShutdownConnection
import mockwebserver3.junit5.StartStop
import okhttp3.Headers.Companion.headersOf
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.ResponseBody.Companion.toResponseBody
import okhttp3.internal.closeQuietly
import okhttp3.testing.PlatformRule
import okhttp3.tls.HandshakeCertificates

import okhttp3.EventListener
import okhttp3.Headers.Companion.headersOf
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.Interceptor
import okhttp3.MediaType
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.OkHttpClient
import okhttp3.OkHttpClientTestRule
import okhttp3.Protocol
import okhttp3.RecordingCookieJar
import okhttp3.RecordingHostnameVerifier
import okhttp3.Request
import okhttp3.RequestBody

import mockwebserver3.SocketEffect.ShutdownConnection
import mockwebserver3.junit5.StartStop
import okhttp3.Cache.Companion.key
import okhttp3.Headers.Companion.headersOf
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.internal.addHeaderLenient
import okhttp3.internal.cacheGet

import okhttp3.Credentials.basic
import okhttp3.Headers.Companion.headersOf
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.TestUtil.assertSuppressed
import okhttp3.internal.RecordingAuthenticator
import okhttp3.internal.RecordingOkAuthenticator
import okhttp3.internal.USER_AGENT