public function test_show()
{
$model = m::mock(Billet::class);
$repo = m::mock(BilletRepository::class);
$repo->shouldReceive('get')->once()->andReturn($model);
App::instance(BilletRepository::class, $repo);
$controller = App::make(BilletController::class);
$get = $controller->show(1);
$this->assertInstanceOf(Billet::class, $get);
}