[Server] IoServer cleanup

Removed React event loop as a requirement; loop can be run outside
Removed Server as a requirement for Connection; wasn't used anymore

src/Ratchet/Server/IoConnection.php

@@ -7,19 +7,13 @@ use React\Socket\ConnectionInterface as ReactConn;
  * {@inheritdoc}
  */
 class IoConnection implements ConnectionInterface {
-    /**
-     * @var Ratchet\Server\IOServer
-     */
-    protected $server;
-
     /**
      * @var React\Socket\ConnectionInterface
      */
     protected $conn;
 
-    public function __construct(ReactConn $conn, IoServer $server) {
+    public function __construct(ReactConn $conn) {
         $this->conn   = $conn;
-        $this->server = $server;
     }
 
     /**

src/Ratchet/Server/IoServer.php

@@ -31,9 +31,9 @@ class IoServer {
     /**
      * @param Ratchet\MessageComponentInterface The Ratchet application stack to host
      * @param React\Socket\ServerInterface The React socket server to run the Ratchet application off of
-     * @param React\EventLoop\LoopInterface The React looper to run the Ratchet application off of
+     * @param React\EventLoop\LoopInterface|null The React looper to run the Ratchet application off of
      */
-    public function __construct(MessageComponentInterface $app, ServerInterface $socket, LoopInterface $loop) {
+    public function __construct(MessageComponentInterface $app, ServerInterface $socket, LoopInterface $loop = null) {
         gc_enable();
         set_time_limit(0);
         ob_implicit_flush();
@@ -64,8 +64,13 @@ class IoServer {
 
     /**
      * Run the application by entering the event loop
+     * @throws RuntimeException If a loop was not previously specified
      */
     public function run() {
+        if (null === $this->loop) {
+            throw new \RuntimeException("A React Loop was not provided during instantiation");
+        }
+
         $this->loop->run();
     }
 
@@ -73,7 +78,7 @@ class IoServer {
      * Triggered when a new connection is received from React
      */
     public function handleConnect($conn) {
-        $conn->decor = new IoConnection($conn, $this);
+        $conn->decor = new IoConnection($conn);
 
         $conn->decor->resourceId    = (int)$conn->stream;
         $conn->decor->remoteAddress = $conn->getRemoteAddress();

tests/Ratchet/Tests/Server/IoServerTest.php

@@ -20,7 +20,7 @@ class IoServerTest extends \PHPUnit_Framework_TestCase {
     public function setUp() {
         $this->app = new Component;
 
-        $loop = new StreamSelectLoop(0);
+        $loop = new StreamSelectLoop;
         $this->reactor = new Server($loop);
         $this->reactor->listen(0);
 
@@ -86,4 +86,12 @@ class IoServerTest extends \PHPUnit_Framework_TestCase {
     public function testFactory() {
         $this->assertInstanceOf('\\Ratchet\\Server\\IoServer', IoServer::factory($this->app, 0));
     }
+
+    public function testNoLoopProvidedError() {
+        $loop = new StreamSelectLoop;
+        $io   = new IoServer(new Component, new Server($loop));
+
+        $this->setExpectedException('RuntimeException');
+        $io->run();
+    }
 }