Allow App To Be Run Without Sending Response

[bradley-holt]

The last line of the \Phlyty\App::run() method sends the response:

$this->response()->send();

The resultant output makes it difficult to perform functional testing. Take the following test case as an example:

public function testGetRootUri()
{
    $request = new \Zend\Http\PhpEnvironment\Request;
    $request->setMethod('GET');
    $request->setUri('/');
    $this->app->setRequest($request);
    $this->app->run();
    $response = $this->app->response();
    $this->assertEquals(200, $response->getStatusCode());
}

Without using output buffering, the body of the response will be output to the terminal when running the test.

It would be great if the \Phlyty\App::run() method included a parameter to send the response (which defaults to true for backwards compatibility). When this parameter is set to false, the $this->response()->send() line would not be called. This would allow me to run the app without sending the response output by simply calling $this->app->run(false). For bonus points, it would be nice if a) the \Phlyty\App::run() method returned the response object and b) I could pass a more generic version of the request object to the app for functional testing purposes.