public function SelectTest::testUnionOrderLimit in Drupal 9

Same name and namespace in other branches

1. 8 core/tests/Drupal/KernelTests/Core/Database/SelectTest.php \Drupal\KernelTests\Core\Database\SelectTest::testUnionOrderLimit()

Tests that we can UNION multiple Select queries together with and a LIMIT.

File

core/tests/Drupal/KernelTests/Core/Database/SelectTest.php, line 403

Class

SelectTest

Tests the Select query builder.

Namespace

Drupal\KernelTests\Core\Database

Code

public function testUnionOrderLimit() {

  // This gives George and Ringo.
  $query_1 = $this->connection
    ->select('test', 't')
    ->fields('t', [
    'name',
  ])
    ->condition('age', [
    27,
    28,
  ], 'IN');

  // This gives Paul.
  $query_2 = $this->connection
    ->select('test', 't')
    ->fields('t', [
    'name',
  ])
    ->condition('age', 26);
  $query_1
    ->union($query_2);
  $query_1
    ->orderBy('name', 'DESC');
  $query_1
    ->range(0, 2);
  $names = $query_1
    ->execute()
    ->fetchCol();

  // Ensure we get all only 2 of the 3 records.
  $this
    ->assertCount(2, $names, 'UNION with a limit returned rows from both queries.');

  // Ensure that the names are in the correct reverse alphabetical order,
  // regardless of which query they came from.
  $this
    ->assertEquals('Ringo', $names[0], 'First query returned correct name.');
  $this
    ->assertEquals('Paul', $names[1], 'Second query returned correct name.');
}