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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2025 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Command\Redis;
/**
* @group commands
* @group realm-list
*/
class LPOP_Test extends PredisCommandTestCase
{
/**
* {@inheritdoc}
*/
protected function getExpectedCommand(): string
{
return 'Predis\Command\Redis\LPOP';
}
/**
* {@inheritdoc}
*/
protected function getExpectedId(): string
{
return 'LPOP';
}
/**
* @group disconnected
*/
public function testFilterArguments(): void
{
$arguments = ['key'];
$expected = ['key'];
$command = $this->getCommand();
$command->setArguments($arguments);
$this->assertSame($expected, $command->getArguments());
}
/**
* @group disconnected
*/
public function testParseResponse(): void
{
$this->assertSame('element', $this->getCommand()->parseResponse('element'));
}
/**
* @group connected
*/
public function testPopsTheFirstElementFromList(): void
{
$redis = $this->getClient();
$redis->rpush('letters', 'a', 'b', 'c', 'd');
$this->assertSame('a', $redis->lpop('letters'));
$this->assertSame('b', $redis->lpop('letters'));
$this->assertSame(['c', 'd'], $redis->lrange('letters', 0, -1));
}
/**
* @group connected
*/
public function testReturnsNullOnEmptyList(): void
{
$redis = $this->getClient();
$this->assertNull($redis->lpop('letters'));
}
/**
* @group connected
*/
public function testThrowsExceptionOnWrongType(): void
{
$this->expectException('Predis\Response\ServerException');
$this->expectExceptionMessage('Operation against a key holding the wrong kind of value');
$redis = $this->getClient();
$redis->set('foo', 'bar');
$redis->lpop('foo');
}
/**
* @group connected
* @requiresRedisVersion >= 6.2
*/
public function testPopsSpecifiedNumberOfElements(): void
{
$redis = $this->getClient();
$redis->rpush('letters', 'a', 'b', 'c', 'd', 'e', 'f');
$this->assertSame(['a', 'b'], $redis->lpop('letters', 2));
$this->assertSame(['c', 'd'], $redis->lpop('letters', 2));
$this->assertSame(['e', 'f'], $redis->lrange('letters', 0, -1));
}
}
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