React\Tests\HttpClient\RequestTest::requestShouldRemoveAllListenerAfterClosed PHP Method

    public function requestShouldRemoveAllListenerAfterClosed()
    {
        $requestData = new RequestData('GET', 'http://www.example.com');
        $request = new Request($this->connector, $requestData);
        $request->on('end', function () {
        });
        $this->assertCount(1, $request->listeners('end'));
        $request->close();
        $this->assertCount(0, $request->listeners('end'));
    }