<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection\Tests\Argument;
use PHPUnit\Framework\TestCase;
use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
class RewindableGeneratorTest extends TestCase
{
public function testImplementsCountable()
$this->assertInstanceOf(\Countable::class, new RewindableGenerator(function () {
yield 1;
}, 1));
}
public function testCountUsesProvidedValue()
$generator = new RewindableGenerator(function () {
}, 3);
$this->assertCount(3, $generator);
public function testCountUsesProvidedValueAsCallback()
$called = 0;
}, function () use (&$called) {
++$called;
return 3;
});
$this->assertSame(0, $called, 'Count callback is called lazily');
count($generator);
$this->assertSame(1, $called, 'Count callback is called only once');