builder = Request.newBuilder();
connection2.receiveProtoMessage(builder);
assertEquals(request2, builder.build());
Response response1 = createResponse(1);
connection1.sendProtoMessage(response1);
Response response2 = createResponse(2);
connection2.sendProtoMessage(response2);
assertEquals(response1, socket1.getResponse());
assertEquals(response2, socket2.getResponse());
}