class BlockResourceTestBase

abstract class BlockResourceTestBase extends ConfigEntityResourceTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $entityTypeId = 'block';
    
    /**
     * @var \Drupal\block\BlockInterface
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    protected function setUpAuthorization($method) {
        switch ($method) {
            case 'GET':
                $this->entity
                    ->setVisibilityConfig('user_role', [])
                    ->save();
                break;
            case 'POST':
                $this->grantPermissionsToTestedRole([
                    'administer blocks',
                ]);
                break;
            case 'PATCH':
                $this->grantPermissionsToTestedRole([
                    'administer blocks',
                ]);
                break;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function createEntity() {
        $block = Block::create([
            'plugin' => 'llama_block',
            'region' => 'header',
            'id' => 'llama',
            'theme' => 'stark',
        ]);
        // All blocks can be viewed by the anonymous user by default. An interesting
        // side effect of this is that any anonymous user is also able to read the
        // corresponding block config entity via REST, even if an authentication
        // provider is configured for the block config entity REST resource! In
        // other words: Block entities do not distinguish between 'view' as in
        // "render on a page" and 'view' as in "read the configuration".
        // This prevents that.
        // @todo Fix this in https://www.drupal.org/node/2820315.
        $block->setVisibilityConfig('user_role', [
            'id' => 'user_role',
            'roles' => [
                'non-existing-role' => 'non-existing-role',
            ],
            'negate' => FALSE,
            'context_mapping' => [
                'user' => '@user.current_user_context:current_user',
            ],
        ]);
        $block->save();
        return $block;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedNormalizedEntity() {
        $normalization = [
            'uuid' => $this->entity
                ->uuid(),
            'id' => 'llama',
            'weight' => NULL,
            'langcode' => 'en',
            'status' => TRUE,
            'dependencies' => [
                'theme' => [
                    'stark',
                ],
            ],
            'theme' => 'stark',
            'region' => 'header',
            'provider' => NULL,
            'plugin' => 'llama_block',
            'settings' => [
                'id' => 'broken',
                'label' => '',
                'provider' => 'core',
                'label_display' => 'visible',
            ],
            'visibility' => [],
        ];
        return $normalization;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getNormalizedPostEntity() {
        // @todo Update in https://www.drupal.org/node/2300677.
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCacheContexts() {
        // @see ::createEntity()
        return [
            'url.site',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCacheTags() {
        // Because the 'user.permissions' cache context is missing, the cache tag
        // for the anonymous user role is never added automatically.
        return array_values(array_diff(parent::getExpectedCacheTags(), [
            'config:user.role.anonymous',
        ]));
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedAccessMessage($method) {
        switch ($method) {
            case 'GET':
                return "The block visibility condition 'user_role' denied access.";
            default:
                return parent::getExpectedUnauthorizedAccessMessage($method);
        }
    }
    
    /**
     * {@inheritdoc}
     *
     * @todo Fix this in https://www.drupal.org/node/2820315.
     */
    protected function getExpectedUnauthorizedAccessCacheability() {
        return (new CacheableMetadata())->setCacheTags([
            '4xx-response',
            'http_response',
        ])
            ->setCacheContexts([
            'user.roles',
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedEntityAccessCacheability($is_authenticated) {
        // @see \Drupal\block\BlockAccessControlHandler::checkAccess()
        return parent::getExpectedUnauthorizedEntityAccessCacheability($is_authenticated)->addCacheTags([
            'config:block.block.llama',
            $is_authenticated ? 'user:2' : 'user:0',
        ]);
    }

}