app.php

<?php

require_once __DIR__.'/silex.phar';
require_once __DIR__.'/twig/lib/Twig/Autoloader.php';

use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Silex\Framework;

Twig_Autoloader::register();

$twig = new Twig_Environment(
    new Twig_Loader_Filesystem(__DIR__.'/templates'),
    array('debug' => true)
);

$render = function($name, array $context = array()) use ($twig) {
    return $twig->loadTemplate($name)->render($context);
};

$app = Framework::create();

$app->get('/hello', function() use ($render) {
    return $render('hello.html');
});

$app->error(function($e) {
    if ($e instanceof NotFoundHttpException) {
        return new Response('The file could not be found.', 404);
    }
});

return $app;

test.php

<?php

// functional test

use Symfony\Component\HttpFoundation\Request;

class test extends PHPUnit_Framework_TestCase
{
    protected $app = null;
    
    public function setUp()
    {
        $this->app = require __DIR__.'/app.php';
    }
    
    public function testHello()
    {
        $request = Request::create('http://test.com/hello');
        $response = $this->app->handle($request);
        $this->assertEquals(200, $response->getStatusCode(), '/hello should return ok response');
        $this->assertContains('stranger', $response->getContent());
    }
    
    public function testAwesome()
    {
        $request = Request::create('http://test.com/awesome');
        $response = $this->app->handle($request);
        $this->assertEquals(200, $response->getStatusCode(), '/awesome should return not found response');
    }
}

web.php

<?php

$app = require __DIR__.'/app.php';
$app->run();