public function SelectPagerDefaultTest::testEvenPagerQuery in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/system/tests/src/Functional/Database/SelectPagerDefaultTest.php \Drupal\Tests\system\Functional\Database\SelectPagerDefaultTest::testEvenPagerQuery()

Confirms that a pager query returns the correct results.

Note that we have to make an HTTP request to a test page handler because the pager depends on GET parameters.

File

core/modules/system/tests/src/Functional/Database/SelectPagerDefaultTest.php, line 28

Class

SelectPagerDefaultTest

Tests the pager query select extender.

Namespace

Drupal\Tests\system\Functional\Database

Code

public function testEvenPagerQuery() {

  // To keep the test from being too brittle, we determine up front
  // what the page count should be dynamically, and pass the control
  // information forward to the actual query on the other side of the
  // HTTP request.
  $limit = 2;
  $count = Database::getConnection()
    ->select('test')
    ->countQuery()
    ->execute()
    ->fetchField();
  $correct_number = $limit;
  $num_pages = floor($count / $limit);

  // If there is no remainder from rounding, subtract 1 since we index from 0.
  if (!($num_pages * $limit < $count)) {
    $num_pages--;
  }
  for ($page = 0; $page <= $num_pages; ++$page) {
    $this
      ->drupalGet('database_test/pager_query_even/' . $limit, [
      'query' => [
        'page' => $page,
      ],
    ]);
    $data = json_decode($this
      ->getSession()
      ->getPage()
      ->getContent());
    if ($page == $num_pages) {
      $correct_number = $count - $limit * $page;
    }
    $this
      ->assertCount($correct_number, $data->names, new FormattableMarkup('Correct number of records returned by pager: @number', [
      '@number' => $correct_number,
    ]));
  }
}