function InstallerIsolationLevelNoDatabaseSettingsTest::testInstaller

Verifies that the isolation_level was added to the database settings.

File

core/modules/mysql/tests/src/Functional/InstallerIsolationLevelNoDatabaseSettingsTest.php, line 38

Class

InstallerIsolationLevelNoDatabaseSettingsTest

Tests the isolation_level setting with no database settings.

Namespace

Code

public function testInstaller() : void {
  $contents = file_get_contents($this->container
    ->getParameter('app.root') . '/' . $this->siteDirectory . '/settings.php');
  // Test that isolation_level was set to "READ COMMITTED".
  $this->assertStringContainsString("'isolation_level' => 'READ COMMITTED',", $contents);
  // Change the default database connection to use the isolation level from
  // the test.
  $connection_info = Database::getConnectionInfo();
  $driver_test_connection = $connection_info['default'];
  // We have asserted that the isolation level was set to 'READ COMMITTED'.
  $driver_test_connection['isolation_level'] = 'READ COMMITTED';
  unset($driver_test_connection['init_commands']);
  Database::renameConnection('default', 'original_database_connection');
  Database::addConnectionInfo('default', 'default', $driver_test_connection);
  // Close and reopen the database connection, so the database init commands
  // get executed.
  Database::closeConnection('default', 'default');
  $connection = Database::getConnection('default', 'default');
  $query = 'SELECT @@SESSION.tx_isolation';
  // The database variable "tx_isolation" has been removed in MySQL v8.0 and
  // has been replaced by "transaction_isolation".
  // @see https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_tx_isolation
  if (!$connection->isMariaDb() && version_compare($connection->version(), '8.0.0-AnyName', '>')) {
    $query = 'SELECT @@SESSION.transaction_isolation';
  }
  // Test that transaction level is READ-COMMITTED.
  $this->assertEquals('READ-COMMITTED', $connection->query($query)
    ->fetchField());
  // Restore the old database connection.
  Database::addConnectionInfo('default', 'default', $connection_info['default']);
  Database::closeConnection('default', 'default');
  Database::getConnection('default', 'default');
}