React\HttpClient\Request::handleError PHP Method

    public function handleError($error)
    {
        $this->closeError(new \RuntimeException("An error occurred in the underlying stream", 0, $error));
    }

 /** @test */
 public function requestShouldEmitErrorIfConnectionEmitsError()
 {
     $requestData = new RequestData('GET', 'http://www.example.com');
     $request = new Request($this->loop, $this->connector, $requestData);
     $this->successfulConnectionMock();
     $handler = $this->createCallableMock();
     $handler->expects($this->once())->method('__invoke')->with($this->isInstanceOf('Exception'), $this->isInstanceOf('React\\HttpClient\\Request'));
     $request->on('error', $handler);
     $handler = $this->createCallableMock();
     $handler->expects($this->once())->method('__invoke')->with($this->isInstanceOf('Exception'), null, $this->isInstanceOf('React\\HttpClient\\Request'));
     $request->on('end', $handler);
     $request->on('close', $this->expectCallableNever());
     $request->end();
     $request->handleError(new \Exception('test'));
 }