*  **There is no longer a global singleton connection pool.** In OkHttp 2.x,
    all `OkHttpClient` instances shared a common connection pool by default.
    In OkHttp 3.x, each new `OkHttpClient` gets its own private connection pool.
    Applications should avoid creating many connection pools as doing so
    prevents connection reuse. Each connection pool holds its own set of

 *
 * In order to avoid confusion and discourage phishing attacks, [IDNA Mapping][idna] transforms
 * names to avoid confusing characters. This includes basic case folding: transforming shouting
 * `SQUARE.COM` into cool and casual `square.com`. It also handles more exotic characters. For
 * example, the Unicode trademark sign (™) could be confused for the letters "TM" in

 * also cause future calls to the client to be rejected.
 *
 * ```java
 * client.dispatcher().executorService().shutdown();
 * ```
 *
 * Clear the connection pool with [evictAll()][ConnectionPool.evictAll]. Note that the connection
 * pool's daemon thread may not exit immediately.
 *
 * ```java
 * client.connectionPool().evictAll();
 * ```
 *

    assertThat(dnsEnd.inetAddressList.size).isEqualTo(1)
  }

  @Test
  fun noDnsLookupOnPooledConnection() {
    server.enqueue(MockResponse())
    server.enqueue(MockResponse())

    // Seed the pool.
    val call1 =
      client.newCall(
        Request.Builder()
          .url(server.url("/"))
          .build(),
      )
    val response1 = call1.execute()
    assertThat(response1.code).isEqualTo(200)