class NodeBodyFieldStorageTest

class NodeBodyFieldStorageTest extends KernelTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'user',
    'system',
    'field',
    'node',
    'text',
    'filter',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installSchema('system', 'sequences');
    // Necessary for module uninstall.
    $this->installSchema('user', 'users_data');
    $this->installEntitySchema('user');
    $this->installEntitySchema('node');
    $this->installConfig([
      'field',
      'node',
    ]);
  }
  
  /**
   * Tests node body field storage persistence even if there are no instances.
   */
  public function testFieldOverrides() {
    $field_storage = FieldStorageConfig::loadByName('node', 'body');
    $this->assertNotEmpty($field_storage, 'Node body field storage exists.');
    $type = NodeType::create([
      'name' => 'Ponies',
      'type' => 'ponies',
    ]);
    $type->save();
    node_add_body_field($type);
    $field_storage = FieldStorageConfig::loadByName('node', 'body');
    $this->assertCount(1, $field_storage->getBundles(), 'Node body field storage is being used on the new node type.');
    $field = FieldConfig::loadByName('node', 'ponies', 'body');
    $field->delete();
    $field_storage = FieldStorageConfig::loadByName('node', 'body');
    $this->assertCount(0, $field_storage->getBundles(), 'Node body field storage exists after deleting the only instance of a field.');
    \Drupal::service('module_installer')->uninstall([
      'node',
    ]);
    $field_storage = FieldStorageConfig::loadByName('node', 'body');
    $this->assertNull($field_storage, 'Node body field storage does not exist after uninstalling the Node module.');
  }

}