Laravel 5 - view('test') in controllers not working as expect

I am new in Laravel. I read documentation and googling but I can't find answer for my problem.

Im trying to render a simple view test.blade.php (located at resources/views).

a) first try: in app/Http/routes.php I wrote

Route::get('/', function(){
    return view('test');
});

It's working. Hurray! I see my simple site

b) second try: in app/Http/routes.php i wrote

Route::get('/', 'WelcomeController@index');

I have created a controller WelcomeController.php in app/Http/Controllers Inside controller I wrote:

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class WelcomeController extends Controller
{
    public function index()
    {
        return view('test');
    }
}

And....this is not working, I see only blank page. Ok I was digging and digging and trying to understand what's the problem. I changed retun view('test') to return view()->make('test'); but this is not working too - it generates only blank page....

Then I simply changed retun to echo: echo view('test'); It is working like charm.

What am I doing wrong? all examples in the internet shows return view('..') not echo view('...') (which is ugly)...

Please help me :)

via Chebli Mohamed