class TermResourceTestBase

abstract class TermResourceTestBase extends EntityResourceTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'taxonomy',
        'path',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $entityTypeId = 'taxonomy_term';
    
    /**
     * {@inheritdoc}
     */
    protected static $patchProtectedFieldNames = [
        'changed' => NULL,
    ];
    
    /**
     * @var \Drupal\taxonomy\TermInterface
     */
    protected $entity;
    
    /**
     * {@inheritdoc}
     */
    protected function setUpAuthorization($method) {
        switch ($method) {
            case 'GET':
                $this->grantPermissionsToTestedRole([
                    'access content',
                ]);
                break;
            case 'POST':
                $this->grantPermissionsToTestedRole([
                    'create terms in camelids',
                ]);
                break;
            case 'PATCH':
                // Grant the 'create url aliases' permission to test the case when
                // the path field is accessible, see
                // \Drupal\Tests\rest\Functional\EntityResource\Node\NodeResourceTestBase
                // for a negative test.
                $this->grantPermissionsToTestedRole([
                    'edit terms in camelids',
                    'create url aliases',
                ]);
                break;
            case 'DELETE':
                $this->grantPermissionsToTestedRole([
                    'delete terms in camelids',
                ]);
                break;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function createEntity() {
        $vocabulary = Vocabulary::load('camelids');
        if (!$vocabulary) {
            // Create a "Camelids" vocabulary.
            $vocabulary = Vocabulary::create([
                'name' => 'Camelids',
                'vid' => 'camelids',
            ]);
            $vocabulary->save();
        }
        // Create a "Llama" taxonomy term.
        $term = Term::create([
            'vid' => $vocabulary->id(),
        ])
            ->setName('Llama')
            ->setDescription("It is a little known fact that llamas cannot count higher than seven.")
            ->setChangedTime(123456789)
            ->set('path', '/llama');
        $term->save();
        return $term;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedNormalizedEntity() {
        // We test with multiple parent terms, and combinations thereof.
        // @see ::createEntity()
        // @see ::testGet()
        // @see ::testGetTermWithParent()
        // @see ::providerTestGetTermWithParent()
        $parent_term_ids = [];
        for ($i = 0; $i < $this->entity
            ->get('parent')
            ->count(); $i++) {
            $parent_term_ids[$i] = (int) $this->entity
                ->get('parent')[$i]->target_id;
        }
        $expected_parent_normalization = FALSE;
        switch ($parent_term_ids) {
            case [
                0,
            ]:
                $expected_parent_normalization = [
                    [
                        'target_id' => NULL,
                    ],
                ];
                break;
            case [
                2,
            ]:
                $expected_parent_normalization = [
                    [
                        'target_id' => 2,
                        'target_type' => 'taxonomy_term',
                        'target_uuid' => Term::load(2)->uuid(),
                        'url' => base_path() . 'taxonomy/term/2',
                    ],
                ];
                break;
            case [
                0,
                2,
            ]:
                $expected_parent_normalization = [
                    [
                        'target_id' => NULL,
                    ],
                    [
                        'target_id' => 2,
                        'target_type' => 'taxonomy_term',
                        'target_uuid' => Term::load(2)->uuid(),
                        'url' => base_path() . 'taxonomy/term/2',
                    ],
                ];
                break;
            case [
                3,
                2,
            ]:
                $expected_parent_normalization = [
                    [
                        'target_id' => 3,
                        'target_type' => 'taxonomy_term',
                        'target_uuid' => Term::load(3)->uuid(),
                        'url' => base_path() . 'taxonomy/term/3',
                    ],
                    [
                        'target_id' => 2,
                        'target_type' => 'taxonomy_term',
                        'target_uuid' => Term::load(2)->uuid(),
                        'url' => base_path() . 'taxonomy/term/2',
                    ],
                ];
                break;
        }
        return [
            'tid' => [
                [
                    'value' => 1,
                ],
            ],
            'revision_id' => [
                [
                    'value' => 1,
                ],
            ],
            'uuid' => [
                [
                    'value' => $this->entity
                        ->uuid(),
                ],
            ],
            'vid' => [
                [
                    'target_id' => 'camelids',
                    'target_type' => 'taxonomy_vocabulary',
                    'target_uuid' => Vocabulary::load('camelids')->uuid(),
                ],
            ],
            'name' => [
                [
                    'value' => 'Llama',
                ],
            ],
            'description' => [
                [
                    'value' => 'It is a little known fact that llamas cannot count higher than seven.',
                    'format' => NULL,
                    'processed' => "<p>It is a little known fact that llamas cannot count higher than seven.</p>\n",
                ],
            ],
            'parent' => $expected_parent_normalization,
            'weight' => [
                [
                    'value' => 0,
                ],
            ],
            'langcode' => [
                [
                    'value' => 'en',
                ],
            ],
            'changed' => [
                [
                    'value' => (new \DateTime())->setTimestamp($this->entity
                        ->getChangedTime())
                        ->setTimezone(new \DateTimeZone('UTC'))
                        ->format(\DateTime::RFC3339),
                    'format' => \DateTime::RFC3339,
                ],
            ],
            'default_langcode' => [
                [
                    'value' => TRUE,
                ],
            ],
            'path' => [
                [
                    'alias' => '/llama',
                    'pid' => 1,
                    'langcode' => 'en',
                ],
            ],
            'status' => [
                [
                    'value' => TRUE,
                ],
            ],
            'revision_created' => [
                [
                    'value' => (new \DateTime())->setTimestamp((int) $this->entity
                        ->getRevisionCreationTime())
                        ->setTimezone(new \DateTimeZone('UTC'))
                        ->format(\DateTime::RFC3339),
                    'format' => \DateTime::RFC3339,
                ],
            ],
            'revision_user' => [],
            'revision_translation_affected' => [
                [
                    'value' => TRUE,
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getNormalizedPostEntity() {
        return [
            'vid' => [
                [
                    'target_id' => 'camelids',
                ],
            ],
            'name' => [
                [
                    'value' => 'Drama llama',
                ],
            ],
            'description' => [
                [
                    'value' => 'Drama llamas are the coolest camelids.',
                    'format' => NULL,
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedAccessMessage($method) {
        switch ($method) {
            case 'GET':
                return "The 'access content' permission is required and the taxonomy term must be published.";
            case 'POST':
                return "The following permissions are required: 'create terms in camelids' OR 'administer taxonomy'.";
            case 'PATCH':
                return "The following permissions are required: 'edit terms in camelids' OR 'administer taxonomy'.";
            case 'DELETE':
                return "The following permissions are required: 'delete terms in camelids' OR 'administer taxonomy'.";
            default:
                return parent::getExpectedUnauthorizedAccessMessage($method);
        }
    }
    
    /**
     * Tests PATCHing a term's path.
     *
     * For a negative test, see the similar test coverage for Node.
     *
     * @see \Drupal\Tests\rest\Functional\EntityResource\Node\NodeResourceTestBase::testPatchPath()
     */
    public function testPatchPath() : void {
        $this->initAuthentication();
        $this->provisionEntityResource();
        $this->setUpAuthorization('GET');
        $this->setUpAuthorization('PATCH');
        $url = $this->getEntityResourceUrl()
            ->setOption('query', [
            '_format' => static::$format,
        ]);
        // GET term's current normalization.
        $response = $this->request('GET', $url, $this->getAuthenticationRequestOptions('GET'));
        $normalization = $this->serializer
            ->decode((string) $response->getBody(), static::$format);
        // Change term's path alias.
        $normalization['path'][0]['alias'] .= 's-rule-the-world';
        // Create term PATCH request.
        $request_options = [];
        $request_options[RequestOptions::HEADERS]['Content-Type'] = static::$mimeType;
        $request_options = array_merge_recursive($request_options, $this->getAuthenticationRequestOptions('PATCH'));
        $request_options[RequestOptions::BODY] = $this->serializer
            ->encode($normalization, static::$format);
        // PATCH request: 200.
        $response = $this->request('PATCH', $url, $request_options);
        $this->assertResourceResponse(200, FALSE, $response);
        $updated_normalization = $this->serializer
            ->decode((string) $response->getBody(), static::$format);
        $this->assertSame($normalization['path'], $updated_normalization['path']);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCacheTags() {
        return Cache::mergeTags(parent::getExpectedCacheTags(), [
            'config:filter.format.plain_text',
            'config:filter.settings',
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedCacheContexts() {
        return Cache::mergeContexts([
            'url.site',
        ], $this->container
            ->getParameter('renderer.config')['required_cache_contexts']);
    }
    
    /**
     * Tests GETting a term with a parent term other than the default <root> (0).
     *
     * @see ::getExpectedNormalizedEntity()
     *
     * @dataProvider providerTestGetTermWithParent
     */
    public function testGetTermWithParent(array $parent_term_ids) : void {
        // Create all possible parent terms.
        Term::create([
            'vid' => Vocabulary::load('camelids')->id(),
        ])
            ->setName('Lamoids')
            ->save();
        Term::create([
            'vid' => Vocabulary::load('camelids')->id(),
        ])
            ->setName('Camels')
            ->save();
        // Modify the entity under test to use the provided parent terms.
        $this->entity
            ->set('parent', $parent_term_ids)
            ->save();
        $this->initAuthentication();
        $url = $this->getEntityResourceUrl();
        $url->setOption('query', [
            '_format' => static::$format,
        ]);
        $request_options = $this->getAuthenticationRequestOptions('GET');
        $this->provisionEntityResource();
        $this->setUpAuthorization('GET');
        $response = $this->request('GET', $url, $request_options);
        $expected = $this->getExpectedNormalizedEntity();
        static::recursiveKSort($expected);
        $actual = $this->serializer
            ->decode((string) $response->getBody(), static::$format);
        static::recursiveKSort($actual);
        $this->assertSame($expected, $actual);
    }
    public static function providerTestGetTermWithParent() {
        return [
            'root parent: [0] (= no parent)' => [
                [
                    0,
                ],
            ],
            'non-root parent: [2]' => [
                [
                    2,
                ],
            ],
            'multiple parents: [0,2] (root + non-root parent)' => [
                [
                    0,
                    2,
                ],
            ],
            'multiple parents: [3,2] (both non-root parents)' => [
                [
                    3,
                    2,
                ],
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getExpectedUnauthorizedEntityAccessCacheability($is_authenticated) {
        // @see \Drupal\taxonomy\TermAccessControlHandler::checkAccess()
        return parent::getExpectedUnauthorizedEntityAccessCacheability($is_authenticated)->addCacheTags([
            'taxonomy_term:1',
        ]);
    }

}