RangeQueryTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Database;


/**
 * Tests the Range query functionality.
 *
 * @group Database
 */
class RangeQueryTest extends DatabaseTestBase {
    
    /**
     * Confirms that range queries work and return the correct result.
     */
    public function testRangeQuery() : void {
        // Test if return correct number of rows.
        $range_rows = $this->connection
            ->queryRange("SELECT [name] FROM {test} ORDER BY [name]", 1, 3)
            ->fetchAll();
        $this->assertCount(3, $range_rows, 'Range query work and return correct number of rows.');
        // Test if return target data.
        $raw_rows = $this->connection
            ->query('SELECT [name] FROM {test} ORDER BY [name]')
            ->fetchAll();
        $raw_rows = array_slice($raw_rows, 1, 3);
        $this->assertEquals($range_rows, $raw_rows);
    }

}