function SelectPagerDefaultTest::testElementNumbers

Confirms that every pager gets a valid, non-overlapping element ID.

File

core/modules/system/tests/src/Functional/Database/SelectPagerDefaultTest.php, line 137

Class

SelectPagerDefaultTest

Tests the pager query select extender.

Namespace

Code

public function testElementNumbers() {
    $request = Request::createFromGlobals();
    $request->query
        ->replace([
        'page' => '3, 2, 1, 0',
    ]);
    \Drupal::getContainer()->get('request_stack')
        ->push($request);
    $connection = Database::getConnection();
    $name = $connection->select('test', 't')
        ->extend('Drupal\\Core\\Database\\Query\\PagerSelectExtender')
        ->element(2)
        ->fields('t', [
        'name',
    ])
        ->orderBy('age')
        ->limit(1)
        ->execute()
        ->fetchField();
    $this->assertEqual($name, 'Paul', 'Pager query #1 with a specified element ID returned the correct results.');
    // Setting an element smaller than the previous one
    // should not overwrite the pager $maxElement with a smaller value.
    $name = $connection->select('test', 't')
        ->extend('Drupal\\Core\\Database\\Query\\PagerSelectExtender')
        ->element(1)
        ->fields('t', [
        'name',
    ])
        ->orderBy('age')
        ->limit(1)
        ->execute()
        ->fetchField();
    $this->assertEqual($name, 'George', 'Pager query #2 with a specified element ID returned the correct results.');
    $name = $connection->select('test', 't')
        ->extend('Drupal\\Core\\Database\\Query\\PagerSelectExtender')
        ->fields('t', [
        'name',
    ])
        ->orderBy('age')
        ->limit(1)
        ->execute()
        ->fetchField();
    $this->assertEqual($name, 'John', 'Pager query #3 with a generated element ID returned the correct results.');
}