predis/tests/Predis/Command/Redis/SELECT_Test.php

<?php

/*
 * This file is part of the Predis package.
 *
 * (c) 2009-2020 Daniele Alessandri
 * (c) 2021-2026 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-connection
 */
class SELECT_Test extends PredisCommandTestCase
{
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCommand(): string
    {
        return 'Predis\Command\Redis\SELECT';
    }

    /**
     * {@inheritdoc}
     */
    protected function getExpectedId(): string
    {
        return 'SELECT';
    }

    /**
     * @group disconnected
     */
    public function testFilterArguments(): void
    {
        $arguments = [10];
        $expected = [10];

        $command = $this->getCommand();
        $command->setArguments($arguments);

        $this->assertSame($expected, $command->getArguments());
    }

    /**
     * @group disconnected
     */
    public function testParseResponse(): void
    {
        $this->assertSame('OK', $this->getCommand()->parseResponse('OK'));
    }

    /**
     * @group connected
     */
    public function testCanSelectDifferentDatabase(): void
    {
        $redis = $this->getClient();

        $redis->set('foo', 'bar');

        $this->assertEquals('OK', $redis->select(REDIS_SERVER_DBNUM + 1));
        $this->assertSame(0, $redis->exists('foo'));
    }

    /**
     * @group connected
     * @group relay-incompatible
     */
    public function testThrowsExceptionOnUnexpectedDatabaseRange(): void
    {
        $this->expectException('Predis\Response\ServerException');
        $this->expectExceptionMessageMatches('/ERR.*DB index/');

        $redis = $this->getClient();

        $redis->select(100000000);
    }

    /**
     * Relay warns before sending SELECT for indexes beyond `relay.databases`,
     * which PHPUnit would turn into an exception before the server replies.
     *
     * @group connected
     */
    public function testThrowsExceptionOnUnexpectedDatabaseRangeDespiteRelayWarning(): void
    {
        if (!getenv('USE_RELAY')) {
            $this->markTestSkipped('Relay only warns when it is the active connection.');
        }

        $this->expectException('Predis\Response\ServerException');
        $this->expectExceptionMessageMatches('/ERR.*DB index/');

        $redis = $this->getClient();

        $previous = set_error_handler(
            static function ($level, $message, $file = '', $line = 0) use (&$previous) {
                if (strpos($message, 'in-memory databases') !== false) {
                    return true;
                }

                return $previous ? $previous($level, $message, $file, $line) : false;
            }
        );

        try {
            $redis->select(100000000);
        } finally {
            restore_error_handler();
        }
    }

    /**
     * @group connected
     */
    public function testThrowsExceptionOnUnexpectedDatabaseName(): void
    {
        $this->expectException('Predis\Response\ServerException');
        $this->expectExceptionMessageMatches('/ERR.*(invalid DB index|value is not an integer or out of range)/');

        $redis = $this->getClient();

        $redis->select('x');
    }
}