RangeQueryTest.php

<?php

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() {
        // 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);
        $this->assertEqual($range_rows, $raw_rows);
    }

}