public function DeleteTruncateTest::testTruncate in Drupal 9

Same name and namespace in other branches

1. 8 core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php \Drupal\KernelTests\Core\Database\DeleteTruncateTest::testTruncate()

Confirms that we can truncate a whole table successfully.

File

core/tests/Drupal/KernelTests/Core/Database/DeleteTruncateTest.php, line 61

Class

DeleteTruncateTest

Tests delete and truncate queries.

Namespace

Drupal\KernelTests\Core\Database

Code

public function testTruncate() {
  $num_records_before = $this->connection
    ->query("SELECT COUNT(*) FROM {test}")
    ->fetchField();
  $this
    ->assertNotEmpty($num_records_before);
  $this->connection
    ->truncate('test')
    ->execute();
  $num_records_after = $this->connection
    ->query("SELECT COUNT(*) FROM {test}")
    ->fetchField();
  $this
    ->assertEquals(0, $num_records_after, 'Truncate really deletes everything.');
}