class EntityTranslationTest

class EntityTranslationTest extends EntityLanguageTestBase {
    
    /**
     * Tests language related methods of the Entity class.
     */
    public function testEntityLanguageMethods() : void {
        // All entity variations have to have the same results.
        foreach (entity_test_entity_types() as $entity_type) {
            $this->doTestEntityLanguageMethods($entity_type);
        }
    }
    
    /**
     * Executes the entity language method tests for the given entity type.
     *
     * @param string $entity_type
     *   The entity type to run the tests with.
     */
    protected function doTestEntityLanguageMethods($entity_type) {
        $langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('langcode');
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type)
            ->create([
            'name' => 'test',
            'user_id' => $this->container
                ->get('current_user')
                ->id(),
        ]);
        $this->assertEquals($this->languageManager
            ->getDefaultLanguage()
            ->getId(), $entity->language()
            ->getId(), "{$entity_type}: Entity created with API has default language.");
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type)
            ->create([
            'name' => 'test',
            'user_id' => \Drupal::currentUser()->id(),
            $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED,
        ]);
        $this->assertEquals(LanguageInterface::LANGCODE_NOT_SPECIFIED, $entity->language()
            ->getId(), "{$entity_type}: Entity language not specified.");
        $this->assertEmpty($entity->getTranslationLanguages(FALSE), "{$entity_type}: No translations are available");
        // Set the value in default language.
        $entity->set($this->fieldName, [
            0 => [
                'value' => 'default value',
            ],
        ]);
        // Get the value.
        $field = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)
            ->get($this->fieldName);
        $this->assertEquals('default value', $field->value, "{$entity_type}: Untranslated value retrieved.");
        $this->assertEquals(LanguageInterface::LANGCODE_NOT_SPECIFIED, $field->getLangcode(), "{$entity_type}: Field object has the expected langcode.");
        // Try to get add a translation to language neutral entity.
        try {
            $entity->addTranslation($this->langcodes[1]);
            $this->fail('Adding a translation to a language-neutral entity results in an error.');
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
        // Now, make the entity language-specific by assigning a language and test
        // translating it.
        $default_langcode = $this->langcodes[0];
        $entity->{$langcode_key}->value = $default_langcode;
        $entity->{$this->fieldName} = [];
        $this->assertEquals(\Drupal::languageManager()->getLanguage($this->langcodes[0]), $entity->language(), "{$entity_type}: Entity language retrieved.");
        $this->assertEmpty($entity->getTranslationLanguages(FALSE), "{$entity_type}: No translations are available");
        // Set the value in default language.
        $entity->set($this->fieldName, [
            0 => [
                'value' => 'default value',
            ],
        ]);
        // Get the value.
        $field = $entity->get($this->fieldName);
        $this->assertEquals('default value', $field->value, "{$entity_type}: Untranslated value retrieved.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: Field object has the expected langcode.");
        // Set a translation.
        $entity->addTranslation($this->langcodes[1])
            ->set($this->fieldName, [
            0 => [
                'value' => 'translation 1',
            ],
        ]);
        $field = $entity->getTranslation($this->langcodes[1])->{$this->fieldName};
        $this->assertEquals('translation 1', $field->value, "{$entity_type}: Translated value set.");
        $this->assertEquals($this->langcodes[1], $field->getLangcode(), "{$entity_type}: Field object has the expected langcode.");
        // Make sure the untranslated value stays.
        $field = $entity->get($this->fieldName);
        $this->assertEquals('default value', $field->value, 'Untranslated value stays.');
        $this->assertEquals($default_langcode, $field->getLangcode(), 'Untranslated value has the expected langcode.');
        $translations[$this->langcodes[1]] = \Drupal::languageManager()->getLanguage($this->langcodes[1]);
        $this->assertEquals($translations, $entity->getTranslationLanguages(FALSE), 'Translations retrieved.');
        // Try to get a value using a language code for a non-existing translation.
        try {
            $entity->getTranslation($this->langcodes[2])
                ->get($this->fieldName)->value;
            $this->fail('Getting a non existing translation results in an error.');
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
        // Try to get a not available translation.
        $this->assertNull($entity->addTranslation($this->langcodes[2])
            ->get($this->fieldName)->value, "{$entity_type}: A translation that is not available is NULL.");
        // Try to get a value using an invalid language code.
        try {
            $entity->getTranslation('invalid')
                ->get($this->fieldName)->value;
            $this->fail('Getting an invalid translation results in an error.');
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
        // Try to set a value using an invalid language code.
        try {
            $entity->getTranslation('invalid')
                ->set($this->fieldName, NULL);
            $this->fail("{$entity_type}: Setting a translation for an invalid language throws an exception.");
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
        // Set the value in default language.
        $field_name = 'field_test_text';
        $entity->getTranslation($this->langcodes[1])
            ->set($field_name, [
            0 => [
                'value' => 'default value2',
            ],
        ]);
        // Get the value.
        $field = $entity->get($field_name);
        $this->assertEquals('default value2', $field->value, "{$entity_type}: Untranslated value set into a translation in non-strict mode.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: Field object has the expected langcode.");
    }
    
    /**
     * Tests multilingual properties.
     */
    public function testMultilingualProperties() : void {
        // Test all entity variations with data table support.
        foreach (entity_test_entity_types(ENTITY_TEST_TYPES_MULTILINGUAL) as $entity_type) {
            $this->doTestMultilingualProperties($entity_type);
        }
    }
    
    /**
     * Executes the multilingual property tests for the given entity type.
     *
     * @param string $entity_type
     *   The entity type to run the tests with.
     */
    protected function doTestMultilingualProperties($entity_type) {
        $langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('langcode');
        $default_langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('default_langcode');
        $name = $this->randomMachineName();
        $uid = 2;
        $langcode = $this->langcodes[0];
        // Create a language neutral entity and check that properties are stored
        // as language neutral.
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type);
        $entity = $storage->create([
            'name' => $name,
            'user_id' => $uid,
            $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED,
        ]);
        $entity->save();
        $entity = $storage->load($entity->id());
        $default_langcode = $entity->language()
            ->getId();
        $this->assertEquals(LanguageInterface::LANGCODE_NOT_SPECIFIED, $default_langcode, "{$entity_type}: Entity created as language neutral.");
        $field = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)
            ->get('name');
        $this->assertEquals($name, $field->value, "{$entity_type}: The entity name has been correctly stored as language neutral.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: The field object has the expect langcode.");
        $this->assertEquals($uid, $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT)
            ->get('user_id')->target_id, "{$entity_type}: The entity author has been correctly stored as language neutral.");
        $translation = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT);
        $field = $translation->get('name');
        $this->assertEquals($name, $field->value, "{$entity_type}: The entity name defaults to neutral language.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: The field object has the expect langcode.");
        $this->assertEquals($uid, $translation->get('user_id')->target_id, "{$entity_type}: The entity author defaults to neutral language.");
        $field = $entity->get('name');
        $this->assertEquals($name, $field->value, "{$entity_type}: The entity name can be retrieved without specifying a language.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: The field object has the expect langcode.");
        $this->assertEquals($uid, $entity->get('user_id')->target_id, "{$entity_type}: The entity author can be retrieved without specifying a language.");
        // Create a language-aware entity and check that properties are stored
        // as language-aware.
        $entity = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type)
            ->create([
            'name' => $name,
            'user_id' => $uid,
            $langcode_key => $langcode,
        ]);
        $entity->save();
        $entity = $storage->load($entity->id());
        $default_langcode = $entity->language()
            ->getId();
        $this->assertEquals($langcode, $default_langcode, "{$entity_type}: Entity created as language specific.");
        $field = $entity->getTranslation($langcode)
            ->get('name');
        $this->assertEquals($name, $field->value, "{$entity_type}: The entity name has been correctly stored as a language-aware property.");
        $this->assertEquals($default_langcode, $field->getLangcode(), "{$entity_type}: The field object has the expect langcode.");
        $this->assertEquals($uid, $entity->getTranslation($langcode)
            ->get('user_id')->target_id, "{$entity_type}: The entity author has been correctly stored as a language-aware property.");
        // Create property translations.
        $properties = [];
        $default_langcode = $langcode;
        foreach ($this->langcodes as $langcode) {
            if ($langcode != $default_langcode) {
                $properties[$langcode] = [
                    'name' => [
                        0 => $this->randomMachineName(),
                    ],
                    // Note that the user ID here is intentionally random, which is not
                    // what we normally do in tests.
'user_id' => [
                        0 => mt_rand(128, 256),
                    ],
                ];
            }
            else {
                $properties[$langcode] = [
                    'name' => [
                        0 => $name,
                    ],
                    'user_id' => [
                        0 => $uid,
                    ],
                ];
            }
            $translation = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode) : $entity->addTranslation($langcode);
            foreach ($properties[$langcode] as $field_name => $values) {
                $translation->set($field_name, $values);
            }
        }
        $entity->save();
        // Check that property translation were correctly stored.
        $entity = $storage->load($entity->id());
        foreach ($this->langcodes as $langcode) {
            $field = $entity->getTranslation($langcode)
                ->get('name');
            $this->assertEquals($properties[$langcode]['name'][0], $field->value, "{$entity_type}: The entity name has been correctly stored for language {$langcode}.");
            $field_langcode = $langcode == $entity->language()
                ->getId() ? $default_langcode : $langcode;
            $this->assertEquals($field->getLangcode(), $field_langcode, "{$entity_type}: The field object has the expected langcode  {$langcode}.");
            $this->assertEquals($entity->getTranslation($langcode)
                ->get('user_id')->target_id, $properties[$langcode]['user_id'][0], "{$entity_type}: The entity author has been correctly stored for language {$langcode}.");
        }
        // Test query conditions (cache is reset at each call).
        $translated_id = $entity->id();
        // Create an additional entity with only the uid set. The uid for the
        // original language is the same of one used for a translation.
        $langcode = $this->langcodes[1];
        
        /** @var \Drupal\Core\Entity\EntityStorageInterface $storage */
        $storage = $this->container
            ->get('entity_type.manager')
            ->getStorage($entity_type);
        $storage->create([
            'user_id' => $properties[$langcode]['user_id'],
            'name' => 'some name',
            $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED,
        ])
            ->save();
        $entities = $storage->loadMultiple();
        $this->assertCount(3, $entities, "{$entity_type}: Three entities were created.");
        $entities = $storage->loadMultiple([
            $translated_id,
        ]);
        $this->assertCount(1, $entities, "{$entity_type}: One entity correctly loaded by id.");
        $entities = $storage->loadByProperties([
            'name' => $name,
        ]);
        $this->assertCount(2, $entities, "{$entity_type}: Two entities correctly loaded by name.");
        // @todo The default language condition should go away in favor of an
        // explicit parameter.
        $entities = $storage->loadByProperties([
            'name' => $properties[$langcode]['name'][0],
            $default_langcode_key => 0,
        ]);
        $this->assertCount(1, $entities, "{$entity_type}: One entity correctly loaded by name translation.");
        $entities = $storage->loadByProperties([
            $langcode_key => $default_langcode,
            'name' => $name,
        ]);
        $this->assertCount(1, $entities, "{$entity_type}: One entity correctly loaded by name and language.");
        $entities = $storage->loadByProperties([
            $langcode_key => $langcode,
            'name' => $properties[$langcode]['name'][0],
        ]);
        $this->assertCount(0, $entities, "{$entity_type}: No entity loaded by name translation specifying the translation language.");
        $entities = $storage->loadByProperties([
            $langcode_key => $langcode,
            'name' => $properties[$langcode]['name'][0],
            $default_langcode_key => 0,
        ]);
        $this->assertCount(1, $entities, "{$entity_type}: One entity loaded by name translation and language specifying to look for translations.");
        $entities = $storage->loadByProperties([
            'user_id' => $properties[$langcode]['user_id'][0],
            $default_langcode_key => NULL,
        ]);
        $this->assertCount(2, $entities, "{$entity_type}: Two entities loaded by uid without caring about property translatability.");
        // Test property conditions and orders with multiple languages in the same
        // query.
        $query = \Drupal::entityQuery($entity_type)->accessCheck(FALSE);
        $group = $query->andConditionGroup()
            ->condition('user_id', $properties[$default_langcode]['user_id'][0], '=', $default_langcode)
            ->condition('name', $properties[$default_langcode]['name'][0], '=', $default_langcode);
        $result = $query->condition($group)
            ->condition('name', $properties[$langcode]['name'][0], '=', $langcode)
            ->execute();
        $this->assertCount(1, $result, "{$entity_type}: One entity loaded by name and uid using different language meta conditions.");
        // Test mixed property and field conditions.
        $storage->resetCache($result);
        $entity = $storage->load(reset($result));
        $field_value = $this->randomString();
        $entity->getTranslation($langcode)
            ->set($this->fieldName, [
            [
                'value' => $field_value,
            ],
        ]);
        $entity->save();
        $query = \Drupal::entityQuery($entity_type)->accessCheck(FALSE);
        $default_langcode_group = $query->andConditionGroup()
            ->condition('user_id', $properties[$default_langcode]['user_id'][0], '=', $default_langcode)
            ->condition('name', $properties[$default_langcode]['name'][0], '=', $default_langcode);
        $langcode_group = $query->andConditionGroup()
            ->condition('name', $properties[$langcode]['name'][0], '=', $langcode)
            ->condition("{$this->fieldName}.value", $field_value, '=', $langcode);
        $result = $query->condition($langcode_key, $default_langcode)
            ->condition($default_langcode_group)
            ->condition($langcode_group)
            ->execute();
        $this->assertCount(1, $result, "{$entity_type}: One entity loaded by name, uid and field value using different language meta conditions.");
    }
    
    /**
     * Tests the Entity Translation API behavior.
     */
    public function testEntityTranslationAPI() : void {
        // Test all entity variations with data table support.
        foreach (entity_test_entity_types(ENTITY_TEST_TYPES_MULTILINGUAL) as $entity_type) {
            $this->doTestEntityTranslationAPI($entity_type);
        }
    }
    
    /**
     * Executes the Entity Translation API tests for the given entity type.
     *
     * @param string $entity_type
     *   The entity type to run the tests with.
     */
    protected function doTestEntityTranslationAPI($entity_type) {
        $default_langcode = $this->langcodes[0];
        $langcode = $this->langcodes[1];
        $langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('langcode');
        $default_langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('default_langcode');
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $this->entityTypeManager
            ->getStorage($entity_type)
            ->create([
            'name' => $this->randomMachineName(),
            $langcode_key => LanguageInterface::LANGCODE_NOT_SPECIFIED,
        ]);
        $entity->save();
        $hooks = $this->getHooksInfo();
        $this->assertEmpty($hooks, 'No entity translation hooks are fired when creating an entity.');
        // Verify that we obtain the entity object itself when we attempt to
        // retrieve a translation referring to it.
        $translation = $entity->getTranslation(LanguageInterface::LANGCODE_NOT_SPECIFIED);
        $this->assertFalse($translation->isNewTranslation(), 'Existing translations are not marked as new.');
        $this->assertSame($entity, $translation, 'The translation object corresponding to a non-default language is the entity object itself when the entity is language-neutral.');
        $entity->{$langcode_key}->value = $default_langcode;
        $translation = $entity->getTranslation($default_langcode);
        $this->assertSame($entity, $translation, 'The translation object corresponding to the default language (explicit) is the entity object itself.');
        $translation = $entity->getTranslation(LanguageInterface::LANGCODE_DEFAULT);
        $this->assertSame($entity, $translation, 'The translation object corresponding to the default language (implicit) is the entity object itself.');
        $this->assertTrue($entity->{$default_langcode_key}->value, 'The translation object is the default one.');
        // Verify that trying to retrieve a translation for a locked language when
        // the entity is language-aware causes an exception to be thrown.
        try {
            $entity->getTranslation(LanguageInterface::LANGCODE_NOT_SPECIFIED);
            $this->fail('A language-neutral translation cannot be retrieved.');
        } catch (\LogicException $e) {
            // Expected exception; just continue testing.
        }
        // Create a translation and verify that the translation object and the
        // original object behave independently.
        $name = $default_langcode . '_' . $this->randomMachineName();
        $entity->name->value = $name;
        $name_translated = $langcode . '_' . $this->randomMachineName();
        $translation = $entity->addTranslation($langcode);
        $this->assertTrue($translation->isNewTranslation(), 'Newly added translations are marked as new.');
        $this->assertNotSame($entity, $translation, 'The entity and the translation object differ from one another.');
        $this->assertTrue($entity->hasTranslation($langcode), 'The new translation exists.');
        $this->assertEquals($langcode, $translation->language()
            ->getId(), 'The translation language matches the specified one.');
        $this->assertEquals($langcode, $translation->{$langcode_key}->value, 'The translation field language value matches the specified one.');
        $this->assertFalse($translation->{$default_langcode_key}->value, 'The translation object is not the default one.');
        $this->assertEquals($default_langcode, $translation->getUntranslated()
            ->language()
            ->getId(), 'The original language can still be retrieved.');
        $translation->name->value = $name_translated;
        $this->assertEquals($name, $entity->name->value, 'The original name is retained after setting a translated value.');
        $entity->name->value = $name;
        $this->assertEquals($name_translated, $translation->name->value, 'The translated name is retained after setting the original value.');
        // Save the translation and check that the expected hooks are fired.
        $translation->save();
        $hooks = $this->getHooksInfo();
        $this->assertEquals($langcode, $hooks['entity_translation_create'], 'The generic entity translation creation hook has fired.');
        $this->assertEquals($langcode, $hooks[$entity_type . '_translation_create'], 'The entity-type-specific entity translation creation hook has fired.');
        $this->assertEquals($langcode, $hooks['entity_translation_insert'], 'The generic entity translation insertion hook has fired.');
        $this->assertEquals($langcode, $hooks[$entity_type . '_translation_insert'], 'The entity-type-specific entity translation insertion hook has fired.');
        // Verify that changing translation language causes an exception to be
        // thrown.
        try {
            $translation->{$langcode_key}->value = $this->langcodes[2];
            $this->fail('The translation language cannot be changed.');
        } catch (\LogicException $e) {
            // Expected exception; just continue testing.
        }
        // Verify that reassigning the same translation language is allowed.
        try {
            $translation->{$langcode_key}->value = $langcode;
        } catch (\LogicException $e) {
            $this->fail('The translation language can be reassigned the same value.');
        }
        // Verify that changing the default translation flag causes an exception to
        // be thrown.
        foreach ($entity->getTranslationLanguages() as $t_langcode => $language) {
            $translation = $entity->getTranslation($t_langcode);
            $default = $translation->isDefaultTranslation();
            try {
                $translation->{$default_langcode_key}->value = $default;
            } catch (\LogicException $e) {
                $this->fail('The default translation flag can be reassigned the same value.');
            }
            try {
                $translation->{$default_langcode_key}->value = !$default;
                $this->fail('The default translation flag cannot be changed.');
            } catch (\LogicException $e) {
                // Expected exception; just continue testing.
            }
            $this->assertEquals($default, $translation->{$default_langcode_key}->value);
        }
        // Check that after loading an entity the language is the default one.
        $entity = $this->reloadEntity($entity);
        $this->assertEquals($default_langcode, $entity->language()
            ->getId(), 'The loaded entity is the original one.');
        // Add another translation and check that everything works as expected. A
        // new translation object can be obtained also by just specifying a valid
        // language.
        $langcode2 = $this->langcodes[2];
        $translation = $entity->addTranslation($langcode2);
        $value = $entity !== $translation && $translation->language()
            ->getId() == $langcode2 && $entity->hasTranslation($langcode2);
        $this->assertTrue($value, 'A new translation object can be obtained also by specifying a valid language.');
        $this->assertEquals($default_langcode, $entity->language()
            ->getId(), 'The original language has been preserved.');
        $translation->save();
        $hooks = $this->getHooksInfo();
        $this->assertEquals($langcode2, $hooks['entity_translation_create'], 'The generic entity translation creation hook has fired.');
        $this->assertEquals($langcode2, $hooks[$entity_type . '_translation_create'], 'The entity-type-specific entity translation creation hook has fired.');
        $this->assertEquals($langcode2, $hooks['entity_translation_insert'], 'The generic entity translation insertion hook has fired.');
        $this->assertEquals($langcode2, $hooks[$entity_type . '_translation_insert'], 'The entity-type-specific entity translation insertion hook has fired.');
        // Verify that trying to manipulate a translation object referring to a
        // removed translation results in exceptions being thrown.
        $entity = $this->reloadEntity($entity);
        $translation = $entity->getTranslation($langcode2);
        $entity->removeTranslation($langcode2);
        foreach ([
            'get',
            'set',
            '__get',
            '__set',
            'createDuplicate',
        ] as $method) {
            try {
                $translation->{$method}('name', $this->randomMachineName());
                $this->fail("The {$method} method raises an exception when trying to manipulate a removed translation.");
            } catch (\Exception $e) {
                // Expected exception; just continue testing.
            }
        }
        // Verify that deletion hooks are fired when saving an entity with a removed
        // translation.
        $entity->save();
        $hooks = $this->getHooksInfo();
        $this->assertEquals($langcode2, $hooks['entity_translation_delete'], 'The generic entity translation deletion hook has fired.');
        $this->assertEquals($langcode2, $hooks[$entity_type . '_translation_delete'], 'The entity-type-specific entity translation deletion hook has fired.');
        $entity = $this->reloadEntity($entity);
        $this->assertFalse($entity->hasTranslation($langcode2), 'The translation does not appear among available translations after saving the entity.');
        // Check that removing an invalid translation causes an exception to be
        // thrown.
        foreach ([
            $default_langcode,
            LanguageInterface::LANGCODE_DEFAULT,
            $this->randomMachineName(),
        ] as $invalid_langcode) {
            try {
                $entity->removeTranslation($invalid_langcode);
                $this->fail("Removing an invalid translation ({$invalid_langcode}) causes an exception to be thrown.");
            } catch (\Exception $e) {
                // Expected exception; just continue testing.
            }
        }
        // Check that hooks are fired only when actually storing data.
        $entity = $this->reloadEntity($entity);
        $entity->addTranslation($langcode2);
        $entity->removeTranslation($langcode2);
        $entity->save();
        $hooks = $this->getHooksInfo();
        $this->assertTrue(isset($hooks['entity_translation_create']), 'The generic entity translation creation hook is run when adding and removing a translation without storing it.');
        unset($hooks['entity_translation_create']);
        $this->assertTrue(isset($hooks[$entity_type . '_translation_create']), 'The entity-type-specific entity translation creation hook is run when adding and removing a translation without storing it.');
        unset($hooks[$entity_type . '_translation_create']);
        $this->assertEmpty($hooks, 'No other hooks beyond the entity translation creation hooks are run when adding and removing a translation without storing it.');
        // Check that hooks are fired only when actually storing data.
        $entity = $this->reloadEntity($entity);
        $entity->addTranslation($langcode2);
        $entity->save();
        $entity = $this->reloadEntity($entity);
        $this->assertTrue($entity->hasTranslation($langcode2), 'Entity has translation after adding one and saving.');
        $entity->removeTranslation($langcode2);
        $entity->save();
        $entity = $this->reloadEntity($entity);
        $this->assertFalse($entity->hasTranslation($langcode2), 'Entity does not have translation after removing it and saving.');
        // Reset hook firing information.
        $this->getHooksInfo();
        // Verify that entity serialization does not cause stale references to be
        // left around.
        $entity = $this->reloadEntity($entity);
        $translation = $entity->getTranslation($langcode);
        $entity = unserialize(serialize($entity));
        $entity->name->value = $this->randomMachineName();
        $name = $default_langcode . '_' . $this->randomMachineName();
        $entity->getTranslation($default_langcode)->name->value = $name;
        $this->assertEquals($name, $entity->name->value, 'No stale reference for the translation object corresponding to the original language.');
        $translation2 = $entity->getTranslation($langcode);
        $translation2->name->value .= $this->randomMachineName();
        $this->assertNotEquals($translation->name->value, $translation2->name->value, 'No stale reference for the actual translation object.');
        $this->assertEquals($entity, $translation2->getUntranslated(), 'No stale reference in the actual translation object.');
        // Verify that deep-cloning is still available when we are not instantiating
        // a translation object, which instead relies on shallow cloning.
        $entity = $this->reloadEntity($entity);
        $entity->getTranslation($langcode);
        $cloned = clone $entity;
        $translation = $cloned->getTranslation($langcode);
        $this->assertNotSame($entity, $translation->getUntranslated(), 'A cloned entity object has no reference to the original one.');
        $entity->removeTranslation($langcode);
        $this->assertFalse($entity->hasTranslation($langcode));
        $this->assertTrue($cloned->hasTranslation($langcode));
        // Check that untranslatable field references keep working after serializing
        // and cloning the entity.
        $entity = $this->reloadEntity($entity);
        $type = $this->randomMachineName();
        $entity->getTranslation($langcode)->type->value = $type;
        $entity = unserialize(serialize($entity));
        $cloned = clone $entity;
        $translation = $cloned->getTranslation($langcode);
        $translation->type->value = strrev($type);
        $this->assertEquals($cloned->type->value, $translation->type->value, 'Untranslatable field references keep working after serializing and cloning the entity.');
        // Check that per-language defaults are properly populated. The
        // 'entity_test_mul_default_value' entity type is translatable and uses
        // entity_test_field_default_value() as a "default value callback" for its
        // 'description' field.
        $entity = $this->entityTypeManager
            ->getStorage('entity_test_mul_default_value')
            ->create([
            'name' => $this->randomMachineName(),
            'langcode' => $langcode,
        ]);
        $translation = $entity->addTranslation($langcode2);
        $expected = [
            [
                'shape' => "shape:0:description_{$langcode2}",
                'color' => "color:0:description_{$langcode2}",
            ],
            [
                'shape' => "shape:1:description_{$langcode2}",
                'color' => "color:1:description_{$langcode2}",
            ],
        ];
        $this->assertEquals($expected, $translation->description
            ->getValue(), 'Language-aware default values correctly populated.');
        $this->assertEquals($langcode2, $translation->description
            ->getLangcode(), 'Field object has the expected langcode.');
        // Reset hook firing information.
        $this->getHooksInfo();
    }
    
    /**
     * Tests language fallback applied to field and entity translations.
     */
    public function testLanguageFallback() : void {
        // Test all entity variations with data table support.
        foreach (entity_test_entity_types(ENTITY_TEST_TYPES_MULTILINGUAL) as $entity_type) {
            $this->doTestLanguageFallback($entity_type);
        }
    }
    
    /**
     * Executes the language fallback test for the given entity type.
     *
     * @param string $entity_type
     *   The entity type to run the tests with.
     */
    protected function doTestLanguageFallback($entity_type) {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = $this->container
            ->get('renderer');
        $current_langcode = $this->languageManager
            ->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)
            ->getId();
        $this->langcodes[] = $current_langcode;
        $values = [];
        foreach ($this->langcodes as $langcode) {
            $values[$langcode]['name'] = $this->randomMachineName();
            $values[$langcode]['user_id'] = 2;
        }
        $default_langcode = $this->langcodes[0];
        $langcode = $this->langcodes[1];
        $langcode2 = $this->langcodes[2];
        $langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('langcode');
        $languages = $this->languageManager
            ->getLanguages();
        $language = ConfigurableLanguage::load($languages[$langcode]->getId());
        $language->set('weight', 1);
        $language->save();
        $this->languageManager
            ->reset();
        $controller = $this->entityTypeManager
            ->getStorage($entity_type);
        $entity = $controller->create([
            $langcode_key => $default_langcode,
        ] + $values[$default_langcode]);
        $entity->save();
        $entity->addTranslation($langcode, $values[$langcode]);
        $entity->save();
        // Check that retrieving the current translation works as expected.
        $entity = $this->reloadEntity($entity);
        $translation = \Drupal::service('entity.repository')->getTranslationFromContext($entity, $langcode2);
        $this->assertEquals($default_langcode, $translation->language()
            ->getId(), 'The current translation language matches the expected one.');
        // Check that language fallback respects language weight by default.
        $language = ConfigurableLanguage::load($languages[$langcode]->getId());
        $language->set('weight', -1);
        $language->save();
        $translation = \Drupal::service('entity.repository')->getTranslationFromContext($entity, $langcode2);
        $this->assertEquals($langcode, $translation->language()
            ->getId(), 'The current translation language matches the expected one.');
        // Check that the current translation is properly returned.
        $translation = \Drupal::service('entity.repository')->getTranslationFromContext($entity);
        $this->assertEquals($langcode, $translation->language()
            ->getId(), 'The current translation language matches the topmost language fallback candidate.');
        $entity->addTranslation($current_langcode, $values[$current_langcode]);
        $translation = \Drupal::service('entity.repository')->getTranslationFromContext($entity);
        $this->assertEquals($current_langcode, $translation->language()
            ->getId(), 'The current translation language matches the current language.');
        // Check that if the entity has no translation no fallback is applied.
        $entity2 = $controller->create([
            $langcode_key => $default_langcode,
        ]);
        // Get a view builder.
        $controller = $this->entityTypeManager
            ->getViewBuilder($entity_type);
        $entity2_build = $controller->view($entity2);
        $entity2_output = (string) $renderer->renderRoot($entity2_build);
        $translation = \Drupal::service('entity.repository')->getTranslationFromContext($entity2, $default_langcode);
        $translation_build = $controller->view($translation);
        $translation_output = (string) $renderer->renderRoot($translation_build);
        $this->assertSame($entity2_output, $translation_output, 'When the entity has no translation no fallback is applied.');
        // Checks that entity translations are rendered properly.
        $controller = $this->entityTypeManager
            ->getViewBuilder($entity_type);
        $build = $controller->view($entity);
        $renderer->renderRoot($build);
        $this->assertEquals($values[$current_langcode]['name'], $build['label']['#markup'], 'By default the entity is rendered in the current language.');
        $langcodes = array_combine($this->langcodes, $this->langcodes);
        // We have no translation for the $langcode2 language, hence the expected
        // result is the topmost existing translation, that is $langcode.
        $langcodes[$langcode2] = $langcode;
        foreach ($langcodes as $desired => $expected) {
            $build = $controller->view($entity, 'full', $desired);
            // Unset the #cache key so that a fresh render is produced with each pass,
            // making the renderable array keys available to compare.
            unset($build['#cache']);
            $renderer->renderRoot($build);
            $this->assertEquals($values[$expected]['name'], $build['label']['#markup'], 'The entity is rendered in the expected language.');
        }
    }
    
    /**
     * Check that field translatability is handled properly.
     */
    public function testFieldDefinitions() : void {
        // Check that field translatability can be altered to be enabled or disabled
        // in field definitions.
        $entity_type = 'entity_test_mulrev';
        $this->state
            ->set('entity_test.field_definitions.translatable', [
            'name' => FALSE,
        ]);
        $entity_field_manager = \Drupal::service('entity_field.manager');
        $entity_field_manager->clearCachedFieldDefinitions();
        $definitions = $entity_field_manager->getBaseFieldDefinitions($entity_type);
        $this->assertFalse($definitions['name']->isTranslatable(), 'Field translatability can be disabled programmatically.');
        $this->state
            ->set('entity_test.field_definitions.translatable', [
            'name' => TRUE,
        ]);
        $entity_field_manager->clearCachedFieldDefinitions();
        $definitions = $entity_field_manager->getBaseFieldDefinitions($entity_type);
        $this->assertTrue($definitions['name']->isTranslatable(), 'Field translatability can be enabled programmatically.');
        // Check that field translatability is disabled by default.
        $base_field_definitions = EntityTestMulRev::baseFieldDefinitions($this->entityTypeManager
            ->getDefinition($entity_type));
        $this->assertTrue(!isset($base_field_definitions['id']->translatable), 'Translatability for the <em>id</em> field is not defined.');
        $this->assertFalse($definitions['id']->isTranslatable(), 'Field translatability is disabled by default.');
        // Check that entity id keys have the expect translatability.
        $translatable_fields = [
            'id' => TRUE,
            'uuid' => TRUE,
            'revision_id' => TRUE,
            'type' => TRUE,
            'langcode' => FALSE,
        ];
        foreach ($translatable_fields as $name => $translatable) {
            $this->state
                ->set('entity_test.field_definitions.translatable', [
                $name => $translatable,
            ]);
            $entity_field_manager->clearCachedFieldDefinitions();
            try {
                $entity_field_manager->getBaseFieldDefinitions($entity_type);
                $this->fail("Field {$name} cannot be translatable.");
            } catch (\LogicException $e) {
                // Expected exception; just continue testing.
            }
        }
    }
    
    /**
     * Tests that changing entity language does not break field language.
     */
    public function testLanguageChange() : void {
        // Test all entity variations with data table support.
        foreach (entity_test_entity_types(ENTITY_TEST_TYPES_MULTILINGUAL) as $entity_type) {
            $this->doTestLanguageChange($entity_type);
        }
    }
    
    /**
     * Executes the entity language change test for the given entity type.
     *
     * @param string $entity_type
     *   The entity type to run the tests with.
     */
    protected function doTestLanguageChange($entity_type) {
        $langcode_key = $this->entityTypeManager
            ->getDefinition($entity_type)
            ->getKey('langcode');
        $controller = $this->entityTypeManager
            ->getStorage($entity_type);
        $langcode = $this->langcodes[0];
        // Check that field languages match entity language regardless of field
        // translatability.
        $values = [
            $langcode_key => $langcode,
            $this->fieldName => $this->randomMachineName(),
            $this->untranslatableFieldName => $this->randomMachineName(),
        ];
        $entity = $controller->create($values);
        foreach ([
            $this->fieldName,
            $this->untranslatableFieldName,
        ] as $field_name) {
            $this->assertEquals($langcode, $entity->get($field_name)
                ->getLangcode(), 'Field language works as expected.');
        }
        // Check that field languages keep matching entity language even after
        // changing it.
        $langcode = $this->langcodes[1];
        $entity->{$langcode_key}->value = $langcode;
        foreach ([
            $this->fieldName,
            $this->untranslatableFieldName,
        ] as $field_name) {
            $this->assertEquals($langcode, $entity->get($field_name)
                ->getLangcode(), 'Field language works as expected after changing entity language.');
        }
        // Check that entity translation does not affect the language of original
        // field values and untranslatable ones.
        $langcode = $this->langcodes[0];
        $entity->addTranslation($this->langcodes[2], [
            $this->fieldName => $this->randomMachineName(),
        ]);
        $entity->{$langcode_key}->value = $langcode;
        foreach ([
            $this->fieldName,
            $this->untranslatableFieldName,
        ] as $field_name) {
            $this->assertEquals($langcode, $entity->get($field_name)
                ->getLangcode(), 'Field language works as expected after translating the entity and changing language.');
        }
        // Check that setting the default language to an existing translation
        // language causes an exception to be thrown.
        try {
            $entity->{$langcode_key}->value = $this->langcodes[2];
            $this->fail('An exception is thrown when setting the default language to an existing translation language');
        } catch (\InvalidArgumentException $e) {
            // Expected exception; just continue testing.
        }
    }
    
    /**
     * Tests how entity adapters work with translations.
     */
    public function testEntityAdapter() : void {
        $entity_type = 'entity_test';
        $default_langcode = 'en';
        $values[$default_langcode] = [
            'name' => $this->randomString(),
        ];
        $controller = $this->entityTypeManager
            ->getStorage($entity_type);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $controller->create($values[$default_langcode]);
        foreach ($this->langcodes as $langcode) {
            $values[$langcode] = [
                'name' => $this->randomString(),
            ];
            $entity->addTranslation($langcode, $values[$langcode]);
        }
        $langcodes = array_merge([
            $default_langcode,
        ], $this->langcodes);
        foreach ($langcodes as $langcode) {
            $adapter = $entity->getTranslation($langcode)
                ->getTypedData();
            $name = $adapter->get('name')->value;
            $this->assertEquals($values[$langcode]['name'], $name, "Name correctly retrieved from '{$langcode}' adapter");
        }
    }
    
    /**
     * Tests if entity references are correct after adding a new translation.
     */
    public function testFieldEntityReference() : void {
        $entity_type = 'entity_test_mul';
        $controller = $this->entityTypeManager
            ->getStorage($entity_type);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $controller->create();
        foreach ($this->langcodes as $langcode) {
            $entity->addTranslation($langcode);
        }
        $default_langcode = $entity->getUntranslated()
            ->language()
            ->getId();
        foreach (array_keys($entity->getTranslationLanguages()) as $langcode) {
            $translation = $entity->getTranslation($langcode);
            foreach ($translation->getFields() as $field_name => $field) {
                if ($field->getFieldDefinition()
                    ->isTranslatable()) {
                    $this->assertEquals($langcode, $field->getEntity()
                        ->language()
                        ->getId(), "Translatable field {$field_name} on translation {$langcode} has correct entity reference in translation {$langcode}.");
                }
                else {
                    $this->assertEquals($default_langcode, $field->getEntity()
                        ->language()
                        ->getId(), "Non translatable field {$field_name} on translation {$langcode} has correct entity reference in the default translation {$default_langcode}.");
                }
            }
        }
    }
    
    /**
     * Tests that translation statuses are correct after removing translations.
     */
    public function testDeleteEntityTranslation() : void {
        $entity_type = 'entity_test_mul';
        $controller = $this->entityTypeManager
            ->getStorage($entity_type);
        // Create a translatable test field.
        $field_storage = FieldStorageConfig::create([
            'entity_type' => $entity_type,
            'field_name' => 'translatable_test_field',
            'type' => 'field_test',
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'label' => $this->randomMachineName(),
            'bundle' => $entity_type,
        ]);
        $field->save();
        // Create an untranslatable test field.
        $field_storage = FieldStorageConfig::create([
            'entity_type' => $entity_type,
            'field_name' => 'untranslatable_test_field',
            'type' => 'field_test',
            'translatable' => FALSE,
        ]);
        $field_storage->save();
        $field = FieldConfig::create([
            'field_storage' => $field_storage,
            'label' => $this->randomMachineName(),
            'bundle' => $entity_type,
        ]);
        $field->save();
        // Create an entity with both translatable and untranslatable test fields.
        $values = [
            'name' => $this->randomString(),
            'translatable_test_field' => $this->randomString(),
            'untranslatable_test_field' => $this->randomString(),
        ];
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $controller->create($values);
        foreach ($this->langcodes as $langcode) {
            $entity->addTranslation($langcode, $values);
        }
        $entity->save();
        // Assert there are no deleted languages in the lists yet.
        $this->assertNull(\Drupal::state()->get('entity_test.delete.translatable_test_field'));
        $this->assertNull(\Drupal::state()->get('entity_test.delete.untranslatable_test_field'));
        // Remove the second and third langcodes from the entity.
        $entity->removeTranslation('l1');
        $entity->removeTranslation('l2');
        $entity->save();
        // Ensure that for the translatable test field the second and third
        // langcodes are in the deleted languages list.
        $actual = \Drupal::state()->get('entity_test.delete.translatable_test_field');
        $expected_translatable = [
            'l1',
            'l2',
        ];
        sort($actual);
        sort($expected_translatable);
        $this->assertEquals($expected_translatable, $actual);
        // Ensure that the untranslatable test field is untouched.
        $this->assertNull(\Drupal::state()->get('entity_test.delete.untranslatable_test_field'));
        // Delete the entity, which removes all remaining translations.
        $entity->delete();
        // All languages have been deleted now.
        $actual = \Drupal::state()->get('entity_test.delete.translatable_test_field');
        $expected_translatable[] = 'en';
        $expected_translatable[] = 'l0';
        sort($actual);
        sort($expected_translatable);
        $this->assertEquals($expected_translatable, $actual);
        // The untranslatable field is shared and only deleted once, for the
        // default langcode.
        $actual = \Drupal::state()->get('entity_test.delete.untranslatable_test_field');
        $expected_untranslatable = [
            'en',
        ];
        sort($actual);
        sort($expected_untranslatable);
        $this->assertEquals($expected_untranslatable, $actual);
    }
    
    /**
     * Tests the getTranslationStatus method.
     */
    public function testTranslationStatus() : void {
        $entity_type = 'entity_test_mul';
        $storage = $this->entityTypeManager
            ->getStorage($entity_type);
        // Create an entity with both translatable and untranslatable test fields.
        $values = [
            'name' => $this->randomString(),
            'translatable_test_field' => $this->randomString(),
            'untranslatable_test_field' => $this->randomString(),
        ];
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface|\Drupal\Core\TypedData\TranslationStatusInterface $entity */
        // Test that newly created entity has the translation status
        // TRANSLATION_CREATED.
        $entity = $storage->create($values);
        $this->assertEquals(TranslationStatusInterface::TRANSLATION_CREATED, $entity->getTranslationStatus($entity->language()
            ->getId()));
        // Test that after saving a newly created entity it has the translation
        // status TRANSLATION_EXISTING.
        $entity->save();
        $this->assertEquals(TranslationStatusInterface::TRANSLATION_EXISTING, $entity->getTranslationStatus($entity->language()
            ->getId()));
        // Test that after loading an existing entity it has the translation status
        // TRANSLATION_EXISTING.
        $storage->resetCache();
        $entity = $storage->load($entity->id());
        $this->assertEquals(TranslationStatusInterface::TRANSLATION_EXISTING, $entity->getTranslationStatus($entity->language()
            ->getId()));
        foreach ($this->langcodes as $key => $langcode) {
            // Test that after adding a new translation it has the translation status
            // TRANSLATION_CREATED.
            $entity->addTranslation($langcode, $values);
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_CREATED, $entity->getTranslationStatus($langcode));
            // Test that after removing a newly added and not yet saved translation
            // it does not have any translation status for the removed translation.
            $entity->removeTranslation($langcode);
            $this->assertEquals(NULL, $entity->getTranslationStatus($langcode));
            // Test that after adding a new translation and saving the entity it has
            // the translation status TRANSLATION_EXISTING.
            $entity->addTranslation($langcode, $values)
                ->save();
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_EXISTING, $entity->getTranslationStatus($langcode));
            // Test that after removing an existing translation its translation
            // status has changed to TRANSLATION_REMOVED.
            $entity->removeTranslation($langcode);
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_REMOVED, $entity->getTranslationStatus($langcode));
            // Test that after removing an existing translation and adding it again
            // its translation status has changed back to TRANSLATION_EXISTING.
            $entity->addTranslation($langcode, $values);
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_EXISTING, $entity->getTranslationStatus($langcode));
            // Test that after removing an existing translation and saving the entity
            // it does not have any translation status for the removed translation.
            $entity->removeTranslation($langcode);
            $entity->save();
            $this->assertEquals(NULL, $entity->getTranslationStatus($langcode));
            // Tests that after removing an existing translation, saving the entity,
            // adding the translation again, the translation status of this
            // translation is TRANSLATION_CREATED.
            $entity->addTranslation($langcode, $values);
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_CREATED, $entity->getTranslationStatus($langcode));
            $entity->save();
        }
        // Test that after loading an existing entity it has the translation status
        // TRANSLATION_EXISTING for all of its translations.
        $storage->resetCache();
        $entity = $storage->load($entity->id());
        foreach (array_keys($entity->getTranslationLanguages()) as $langcode) {
            $this->assertEquals(TranslationStatusInterface::TRANSLATION_EXISTING, $entity->getTranslationStatus($langcode));
        }
    }
    
    /**
     * Tests the translation object cache.
     */
    public function testTranslationObjectCache() : void {
        $default_langcode = $this->langcodes[1];
        $translation_langcode = $this->langcodes[2];
        $entity = EntityTestMul::create([
            'name' => 'test',
            'langcode' => $default_langcode,
        ]);
        $entity->save();
        $entity->addTranslation($translation_langcode)
            ->save();
        // Test that the default translation object is put into the translation
        // object cache when a new translation object is initialized.
        $entity = \Drupal::entityTypeManager()->getStorage($entity->getEntityTypeId())
            ->loadUnchanged($entity->id());
        $default_translation_spl_object_hash = spl_object_hash($entity);
        $this->assertEquals($default_translation_spl_object_hash, spl_object_hash($entity->getTranslation($translation_langcode)
            ->getTranslation($default_langcode)));
        // Test that non-default translations are always served from the translation
        // object cache.
        $entity = \Drupal::entityTypeManager()->getStorage($entity->getEntityTypeId())
            ->loadUnchanged($entity->id());
        $this->assertEquals(spl_object_hash($entity->getTranslation($translation_langcode)), spl_object_hash($entity->getTranslation($translation_langcode)));
        $this->assertEquals(spl_object_hash($entity->getTranslation($translation_langcode)), spl_object_hash($entity->getTranslation($translation_langcode)
            ->getTranslation($default_langcode)
            ->getTranslation($translation_langcode)));
    }

}