Fix Travis config to test against legacy PHP 5.3 again

.travis.yml

@@ -18,7 +18,6 @@ matrix:
   include:
     - php: 5.3
       dist: precise
-  include:
     - os: osx
       language: generic
       php: 7.0 # just to look right on travis

src/TcpConnector.php

@@ -116,6 +116,13 @@ private function waitForStreamOnce($stream)
             $loop->removeWriteStream($stream);
             fclose($stream);
 
+            // @codeCoverageIgnoreStart
+            // legacy PHP 5.3 sometimes requires a second close call (see tests)
+            if (PHP_VERSION_ID < 50400 && is_resource($stream)) {
+                fclose($stream);
+            }
+            // @codeCoverageIgnoreEnd
+
             $resolve = $reject = $progress = null;
             throw new RuntimeException('Cancelled while waiting for TCP/IP connection to be established');
         });

tests/TcpConnectorTest.php

@@ -221,6 +221,7 @@ public function cancellingConnectionShouldRemoveResourceFromLoopAndCloseResource
         $connector = new TcpConnector($loop);
 
         $server = new TcpServer(0, $loop);
+        $server->on('connection', $this->expectCallableNever());
 
         $loop->expects($this->once())->method('addWriteStream');
         $promise = $connector->connect($server->getAddress());
@@ -234,7 +235,11 @@ public function cancellingConnectionShouldRemoveResourceFromLoopAndCloseResource
         }));
         $promise->cancel();
 
+        // ensure that this was a valid resource during the removeWriteStream() call
         $this->assertTrue($valid);
+
+        // ensure that this resource should now be closed after the cancel() call
+        $this->assertInternalType('resource', $resource);
         $this->assertFalse(is_resource($resource));
     }