code: @Test public void connectionsArePooled() throws Exception {
    MockResponse response=new MockResponse().setBody("ABCDEFGHIJKLMNOPQR");
    server.enqueue(response);
    server.enqueue(response);
    server.enqueue(response);
    server.play();
    assertContent("ABCDEFGHIJKLMNOPQR",client.open(server.getUrl("/foo")));
    assertEquals(0,server.takeRequest().getSequenceNumber());
    assertContent("ABCDEFGHIJKLMNOPQR",client.open(server.getUrl("/bar?baz=quux")));
    assertEquals(1,server.takeRequest().getSequenceNumber());
    assertContent("ABCDEFGHIJKLMNOPQR",client.open(server.getUrl("/z")));
    assertEquals(2,server.takeRequest().getSequenceNumber());
  }
  