class FieldFieldAccessTestBase

abstract class FieldFieldAccessTestBase extends ViewsKernelTestBase {
    
    /**
     * Stores a user entity with access to fields.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $userWithAccess;
    
    /**
     * Stores a user entity without access to fields.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $userWithoutAccess;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'user',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE) {
        parent::setUp($import_test_views);
        $this->installEntitySchema('user');
        $role_with_access = Role::create([
            'id' => 'with_access',
            'permissions' => [
                'view test entity field',
            ],
            'label' => 'With access',
        ]);
        $role_with_access->save();
        $role_without_access = Role::create([
            'id' => 'without_access',
            'permissions' => [],
            'label' => 'Without access',
        ]);
        $role_without_access->save();
        $this->userWithAccess = User::create([
            'name' => $this->randomMachineName(),
            'roles' => [
                $role_with_access->id(),
            ],
        ]);
        $this->userWithAccess
            ->save();
        $this->userWithoutAccess = User::create([
            'name' => $this->randomMachineName(),
            'roles' => [
                $role_without_access->id(),
            ],
        ]);
        $this->userWithoutAccess
            ->save();
    }
    
    /**
     * Checks views field access for a given entity type and field name.
     *
     * To use this method, set up an entity of type $entity_type_id, with field
     * $field_name. Create an entity instance that contains content $field_content
     * in that field.
     *
     * This method will check that a user with permission can see the content in a
     * view, and a user without access permission on that field cannot.
     *
     * @param string $entity_type_id
     *   The entity type ID.
     * @param string $field_name
     *   The field name.
     * @param string $field_content
     *   The expected field content.
     */
    protected function assertFieldAccess($entity_type_id, $field_name, $field_content) {
        \Drupal::state()->set('views_field_access_test-field', $field_name);
        $entity_type = \Drupal::entityTypeManager()->getDefinition($entity_type_id);
        $view_id = $this->randomMachineName();
        $data_table = $entity_type->getDataTable();
        // Use the data table as long as the field is not 'uuid'. This is the only
        // column that can only be obtained from the base table.
        $base_table = $data_table && $field_name !== 'uuid' ? $data_table : $entity_type->getBaseTable();
        $entity = View::create([
            'id' => $view_id,
            'base_table' => $base_table,
            'display' => [
                'default' => [
                    'display_plugin' => 'default',
                    'id' => 'default',
                    'display_options' => [
                        'fields' => [
                            $field_name => [
                                'table' => $base_table,
                                'field' => $field_name,
                                'id' => $field_name,
                                'plugin_id' => 'field',
                            ],
                        ],
                    ],
                ],
            ],
        ]);
        $entity->save();
        
        /** @var \Drupal\Core\Session\AccountSwitcherInterface $account_switcher */
        $account_switcher = \Drupal::service('account_switcher');
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = \Drupal::service('renderer');
        $account_switcher->switchTo($this->userWithAccess);
        $executable = Views::getView($view_id);
        $build = $executable->preview();
        $this->setRawContent($renderer->renderRoot($build));
        $this->assertText($field_content);
        $this->assertTrue(isset($executable->field[$field_name]));
        $account_switcher->switchTo($this->userWithoutAccess);
        $executable = Views::getView($view_id);
        $build = $executable->preview();
        $this->setRawContent($renderer->renderRoot($build));
        $this->assertNoText($field_content);
        $this->assertFalse(isset($executable->field[$field_name]));
        \Drupal::state()->delete('views_field_access_test-field');
    }

}