public function LargeQueryTest::testMaxAllowedPacketQueryTruncating in Drupal 8

Same name and namespace in other branches

1. 9 core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php \Drupal\KernelTests\Core\Database\LargeQueryTest::testMaxAllowedPacketQueryTruncating()
2. 10 core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php \Drupal\KernelTests\Core\Database\LargeQueryTest::testMaxAllowedPacketQueryTruncating()

Tests truncation of messages when max_allowed_packet exception occurs.

File

core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php, line 19

Class

LargeQueryTest

Tests handling of large queries.

Namespace

Drupal\KernelTests\Core\Database

Code

public function testMaxAllowedPacketQueryTruncating() {

  // Only run this test for the 'mysql' driver.
  $driver = $this->connection
    ->driver();
  if ($driver !== 'mysql') {
    $this
      ->markTestSkipped("MySql tests can not run for driver '{$driver}'.");
  }

  // The max_allowed_packet value is configured per database instance.
  // Retrieve the max_allowed_packet value from the current instance and
  // check if PHP is configured with sufficient allowed memory to be able
  // to generate a query larger than max_allowed_packet.
  $max_allowed_packet = $this->connection
    ->query('SELECT @@global.max_allowed_packet')
    ->fetchField();
  if (!Environment::checkMemoryLimit($max_allowed_packet + 16 * 1024 * 1024)) {
    $this
      ->markTestSkipped('The configured max_allowed_packet exceeds the php memory limit. Therefore the test is skipped.');
  }
  $long_name = str_repeat('a', $max_allowed_packet + 1);
  try {
    $this->connection
      ->query('SELECT name FROM {test} WHERE name = :name', [
      ':name' => $long_name,
    ]);
    $this
      ->fail("An exception should be thrown for queries larger than 'max_allowed_packet'");
  } catch (DatabaseException $e) {

    // Close and re-open the connection. Otherwise we will run into error
    // 2006 "MySQL server had gone away" afterwards.
    Database::closeConnection();
    Database::getConnection();

    // Got a packet bigger than 'max_allowed_packet' bytes exception thrown.
    $this
      ->assertEquals(1153, $e
      ->getPrevious()->errorInfo[1]);

    // 'max_allowed_packet' exception message truncated.
    // Use strlen() to count the bytes exactly, not the unicode chars.
    $this
      ->assertLessThanOrEqual($max_allowed_packet, strlen($e
      ->getMessage()));
  }
}