Add test for connection refused

Author: mbonneau

test/ClientTest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace Rx\Websocket\Test;
+
+use React\EventLoop\Factory;
+
+class ClientTest extends \PHPUnit_Framework_TestCase
+{
+    public function testErrorBeforeRequest()
+    {
+        $loop = Factory::create();
+
+        $client = new \Rx\Websocket\Client('ws://127.0.0.1:12340/', false, [], $loop);
+
+        $errored = false;
+
+        $client->subscribe(
+            null,
+            function ($err) use (&$errored) {
+                $errored = true;
+            }
+        );
+
+        $loop->run();
+
+        $this->assertTrue($errored);
+    }
+}