class NoPreExistingSchemaUpdateTest

class NoPreExistingSchemaUpdateTest extends BrowserTestBase {
  use RequirementsPageTrait;
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $connection = Database::getConnection();
    // Enable the update_test_no_preexisting module by altering the
    // core.extension configuration directly, so that the schema version
    // information is missing.
    $extensions = $connection->select('config')
      ->fields('config', [
      'data',
    ])
      ->condition('name', 'core.extension')
      ->execute()
      ->fetchField();
    $extensions = unserialize($extensions);
    $connection->update('config')
      ->fields([
      'data' => serialize(array_merge_recursive($extensions, [
        'module' => [
          'update_test_no_preexisting' => 0,
        ],
      ])),
    ])
      ->condition('name', 'core.extension')
      ->execute();
  }
  
  /**
   * Tests the system module updates with no dependencies installed.
   */
  public function testNoPreExistingSchema() {
    $schema = \Drupal::service('update.update_hook_registry')->getAllInstalledVersions();
    $this->assertArrayNotHasKey('update_test_no_preexisting', $schema);
    $this->assertFalse(\Drupal::state()->get('update_test_no_preexisting_update_8001', FALSE));
    $update_url = Url::fromRoute('system.db_update');
    require_once $this->root . '/core/includes/update.inc';
    // The site might be broken at the time so logging in using the UI might
    // not work, so we use the API itself.
    $this->writeSettings([
      'settings' => [
        'update_free_access' => (object) [
          'value' => TRUE,
          'required' => TRUE,
        ],
      ],
    ]);
    $this->drupalGet($update_url);
    $this->assertSession()
      ->pageTextContains('Schema information for module update_test_no_preexisting was missing from the database. You should manually review the module updates and your database to check if any updates have been skipped up to, and including, update_test_no_preexisting_update_8001().');
    $this->updateRequirementsProblem();
    $schema = \Drupal::service('update.update_hook_registry')->getAllInstalledVersions();
    $this->assertArrayHasKey('update_test_no_preexisting', $schema);
    $this->assertEquals('8001', $schema['update_test_no_preexisting']);
    // The schema version has been fixed, but the update was never run.
    $this->assertFalse(\Drupal::state()->get('update_test_no_preexisting_update_8001', FALSE));
  }

}