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() {

    // 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);
  }

}