You can set a custom body with a string, input stream or byte array. Also
add headers with a fluent builder API.

```java
MockResponse response = new MockResponse()
    .addHeader("Content-Type", "application/json; charset=utf-8")
    .addHeader("Cache-Control", "no-cache")
    .setBody("{}");
```

MockResponse can be used to simulate a slow network. This is useful for
testing timeouts and interactive testing.

```java

                    }
                }
                resp.setHeader("WWW-Authenticate", "NTLM");
                if ( offerBasic ) {
                    resp.addHeader("WWW-Authenticate", "Basic realm=\"" + this.realm + "\"");
                }
                resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
                resp.setContentLength(0); /* Marcel Feb-15-2005 */

      execute(differentDnsUrl)
    }
  }

  @Test
  fun skipsOnRedirectWhenDnsDontMatch() {
    server.enqueue(
      MockResponse.Builder()
        .code(301)
        .addHeader("Location", url.newBuilder().host("differentdns.com").build())
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .body("unexpected call")
        .build(),
    )

                SmbSession.logon(dc, ntlm);
            } catch (SmbAuthException sae) {
                response.setHeader("WWW-Authenticate", "NTLM");
                if (offerBasic) {
                    response.addHeader("WWW-Authenticate", "Basic realm=\"" +
                            realm + "\"");
                }
                response.setHeader("Connection", "close");

        val request = Request.Builder()
            .url("https://api.github.com/repos/square/okhttp/issues")
            .header("User-Agent", "OkHttp Headers.java")
            .addHeader("Accept", "application/json; q=0.5")
            .addHeader("Accept", "application/vnd.github.v3+json")
            .build()

        client.newCall(request).execute().use { response ->

  }

  private fun dnsResponse(s: String): MockResponse {
    return MockResponse.Builder()
      .body(Buffer().write(s.decodeHex()))
      .addHeader("content-type", "application/dns-message")
      .addHeader("content-length", s.length / 2)
      .build()
  }

  private fun buildLocalhost(
    bootstrapClient: OkHttpClient,
    includeIPv6: Boolean,
    post: Boolean = false,

    server.enqueue(
      MockResponse.Builder()
        .body("hello, Apache HttpClient 5.x")
        .build(),
    )

    val request = HttpGet(server.url("/").toUri())
    request.addHeader("Accept", "text/plain")

    httpClient.execute(request).use { response ->
      assertThat(response.code).isEqualTo(200)
      assertThat(EntityUtils.toString(response.entity)).isEqualTo("hello, Apache HttpClient 5.x")

        .build()
    server.enqueue(
      MockResponse.Builder()
        .addHeader("SeNsItIvE", "Value").addHeader("Not-Sensitive", "Value")
        .build(),
    )
    val response =
      client
        .newCall(
          request()
            .addHeader("SeNsItIvE", "Value")
            .addHeader("Not-Sensitive", "Value")
            .build(),
        )
        .execute()

            }
            if ( ntlm == null ) {
                resp.setHeader("WWW-Authenticate", "NTLM");
                if ( offerBasic ) {
                    resp.addHeader("WWW-Authenticate", "Basic realm=\"" + this.realm + "\"");
                }
                resp.setHeader("Connection", "close");
                resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);

	public final fun -deprecated_getStatus ()Ljava/lang/String;
	public final fun -deprecated_getTrailers ()Lokhttp3/Headers;
	public fun <init> ()V
	public final fun addHeader (Ljava/lang/String;)Lokhttp3/mockwebserver/MockResponse;
	public final fun addHeader (Ljava/lang/String;Ljava/lang/Object;)Lokhttp3/mockwebserver/MockResponse;
	public final fun addHeaderLenient (Ljava/lang/String;Ljava/lang/Object;)Lokhttp3/mockwebserver/MockResponse;