function SelectTest::testUnionOrder

Tests that we can UNION multiple Select queries together and set the ORDER.

File

core/tests/Drupal/KernelTests/Core/Database/SelectTest.php, line 376

Class

SelectTest

Tests the Select query builder.

Namespace

Code

public function testUnionOrder() : void {
  // 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');
  $names = $query_1->execute()
    ->fetchCol();
  // Ensure we get all 3 records.
  $this->assertCount(3, $names, 'UNION 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.');
  $this->assertEquals('George', $names[2], 'Third query returned correct name.');
}