Fix closing socket resource before removing from loop

Author: clue

src/Connection.php

@@ -128,9 +128,10 @@ public function handleClose()
         // side already closed. Shutting down may return to blocking mode on
         // some legacy versions, so reset to non-blocking just in case before
         // continuing to close the socket resource.
+        // Underlying Stream implementation will take care of closing file
+        // handle, so we otherwise keep this open here.
         @stream_socket_shutdown($this->stream, STREAM_SHUT_RDWR);
         stream_set_blocking($this->stream, false);
-        fclose($this->stream);
     }
 
     public function getRemoteAddress()

tests/ConnectionTest.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace React\Tests\Socket;
+
+use React\Socket\Connection;
+
+class ConnectionTest extends TestCase
+{
+    public function testCloseConnectionWillCloseSocketResource()
+    {
+        $resource = fopen('php://memory', 'r+');
+        $loop = $this->getMockBuilder('React\EventLoop\LoopInterface')->getMock();
+
+        $connection = new Connection($resource, $loop);
+        $connection->close();
+
+        $this->assertFalse(is_resource($resource));
+    }
+
+    public function testCloseConnectionWillRemoveResourceFromLoopBeforeClosingResource()
+    {
+        $resource = fopen('php://memory', 'r+');
+        $loop = $this->getMockBuilder('React\EventLoop\LoopInterface')->getMock();
+        $loop->expects($this->once())->method('addWriteStream')->with($resource);
+
+        $onRemove = null;
+        $loop->expects($this->once())->method('removeWriteStream')->with($this->callback(function ($param) use (&$onRemove) {
+            $onRemove = is_resource($param);
+            return true;
+        }));
+
+        $connection = new Connection($resource, $loop);
+        $connection->write('test');
+        $connection->close();
+
+        $this->assertTrue($onRemove);
+        $this->assertFalse(is_resource($resource));
+    }
+}

tests/TcpConnectorTest.php

@@ -98,6 +98,28 @@ public function connectionToTcpServerShouldSucceedWithNullAddressesAfterConnecti
         $this->assertNull($connection->getLocalAddress());
     }
 
+    /** @test */
+    public function connectionToTcpServerWillCloseWhenOtherSideCloses()
+    {
+        $loop = Factory::create();
+
+        // immediately close connection and server once connection is in
+        $server = new TcpServer(0, $loop);
+        $server->on('connection', function (ConnectionInterface $conn) use ($server) {
+            $conn->close();
+            $server->close();
+        });
+
+        $once = $this->expectCallableOnce();
+        $connector = new TcpConnector($loop);
+        $connector->connect($server->getAddress())->then(function (ConnectionInterface $conn) use ($once) {
+            $conn->write('hello');
+            $conn->on('close', $once);
+        });
+
+        $loop->run();
+    }
+
     /** @test */
     public function connectionToEmptyIp6PortShouldFail()
     {