function PreventDowngradeTest::testDowngradePrevention

Tests prevention of incorrect update path.

File

core/modules/system/tests/src/Functional/UpdateSystem/PreventDowngradeTest.php, line 36

Class

PreventDowngradeTest

Tests that a site on 11.4.0 is prevented from downgrading to 12.0.0.

Namespace

Code

public function testDowngradePrevention() : void {
  $database = \Drupal::database();
  // Record the update 12001 as an equivalent to update 11102.
  $database->insert('key_value')
    ->fields([
    'collection' => 'core.equivalent_updates',
    'name' => 'downgrade_prevention_test',
    'value' => 'a:1:{i:12001;a:2:{s:10:"ran_update";s:5:"11102";s:21:"future_version_string";s:6:"11.4.0";}}',
  ])
    ->execute();
  // Set the test module schema to 12001.
  $database->insert('key_value')
    ->fields([
    'value' => 'i:12001;',
    'collection' => 'system.schema',
    'name' => 'downgrade_prevention_test',
  ])
    ->execute();
  // Running the updates should fail with a requirements failure because the
  // later update, 12001, is missing from the code base.
  try {
    $this->runUpdates();
  } catch (\Exception) {
    // Continue.
  }
  $this->assertSession()
    ->pageTextContains('Missing updates for: 11.4 downgrade prevention test');
  $this->assertSession()
    ->pageTextContains('The version of the 11.4 downgrade prevention test module that you are attempting to update to is missing update 12001 (which was marked as an equivalent by 11102). Update to at least Drupal Core 11.4.0.');
  // Repeat the test with a code base that does have the 12001 update,
  // downgrade_prevention_test_update_12001(). First, install
  // downgrade_prevention_test.
  $extensions = $database->select('config')
    ->fields('config', [
    'data',
  ])
    ->condition('collection', '')
    ->condition('name', 'core.extension')
    ->execute()
    ->fetchField();
  $extensions = unserialize($extensions);
  // Install the 'downgrade_prevention_test' module.
  $extensions['module']['downgrade_prevention_test'] = 0;
  $database->update('config')
    ->fields([
    'data' => serialize($extensions),
  ])
    ->condition('collection', '')
    ->condition('name', 'core.extension')
    ->execute();
  // Set the schema for 'downgrade_prevention_test' to the update function,
  // 12001.
  $database->update('key_value')
    ->fields([
    'value' => 'i:12001;',
  ])
    ->condition('collection', 'system.schema')
    ->condition('name', 'downgrade_prevention_test')
    ->execute();
  // Running the updates should succeed because the 12001 update function,
  // downgrade_prevention_test_update_12001(), now exists.
  $this->runUpdates();
  $this->assertSession()
    ->pageTextContains('Updates were attempted.');
}