class ContentEntityCloneTest

class ContentEntityCloneTest extends EntityKernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'language',
        'entity_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Enable an additional language.
        ConfigurableLanguage::createFromLangcode('de')->save();
        $this->installEntitySchema('entity_test_mul');
        $this->installEntitySchema('entity_test_mulrev');
    }
    
    /**
     * Tests if entity references on fields are still correct after cloning.
     */
    public function testFieldEntityReferenceAfterClone() : void {
        $user = $this->createUser();
        // Create a test entity.
        $entity = EntityTestMul::create([
            'name' => $this->randomString(),
            'user_id' => $user->id(),
            'language' => 'en',
        ]);
        $translation = $entity->addTranslation('de');
        // Initialize the fields on the translation objects in order to check that
        // they are properly cloned and have a reference to the cloned entity
        // object and not to the original one.
        $entity->getFields();
        $translation->getFields();
        $clone = clone $translation;
        $this->assertEquals($entity->getTranslationLanguages(), $clone->getTranslationLanguages(), 'The entity and its clone have the same translation languages.');
        $default_langcode = $entity->getUntranslated()
            ->language()
            ->getId();
        foreach (array_keys($clone->getTranslationLanguages()) as $langcode) {
            $translation = $clone->getTranslation($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} after cloning.");
                    $this->assertSame($translation, $field->getEntity(), "Translatable field {$field_name} on translation {$langcode} has correct reference to the cloned entity object.");
                }
                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} after cloning.");
                    $this->assertSame($translation->getUntranslated(), $field->getEntity(), "Non translatable field {$field_name} on translation {$langcode} has correct reference to the cloned entity object in the default translation {$default_langcode}.");
                }
            }
        }
    }
    
    /**
     * Tests that the flag for enforcing a new entity is not shared.
     */
    public function testEnforceIsNewOnClonedEntityTranslation() : void {
        // Create a test entity.
        $entity = EntityTestMul::create([
            'name' => $this->randomString(),
            'language' => 'en',
        ]);
        $entity->save();
        $entity_translation = $entity->addTranslation('de');
        $entity->save();
        // The entity is not new anymore.
        $this->assertFalse($entity_translation->isNew());
        // The clone should not be new either.
        $clone = clone $entity_translation;
        $this->assertFalse($clone->isNew());
        // After forcing the clone to be new only it should be flagged as new, but
        // the original entity should not.
        $clone->enforceIsNew();
        $this->assertTrue($clone->isNew());
        $this->assertFalse($entity_translation->isNew());
    }
    
    /**
     * Tests if the entity fields are properly cloned.
     */
    public function testClonedEntityFields() : void {
        $user = $this->createUser();
        // Create a test entity.
        $entity = EntityTestMul::create([
            'name' => $this->randomString(),
            'user_id' => $user->id(),
            'language' => 'en',
        ]);
        $entity->addTranslation('de');
        $entity->save();
        $fields = array_keys($entity->getFieldDefinitions());
        // Reload the entity, clone it and check that both entity objects reference
        // different field instances.
        $entity = $this->reloadEntity($entity);
        $clone = clone $entity;
        $different_references = TRUE;
        foreach ($fields as $field_name) {
            if ($entity->get($field_name) === $clone->get($field_name)) {
                $different_references = FALSE;
            }
        }
        $this->assertTrue($different_references, 'The entity object and the cloned entity object reference different field item list objects.');
        // Reload the entity, initialize one translation, clone it and check that
        // both entity objects reference different field instances.
        $entity = $this->reloadEntity($entity);
        $entity->getTranslation('de');
        $clone = clone $entity;
        $different_references = TRUE;
        foreach ($fields as $field_name) {
            if ($entity->get($field_name) === $clone->get($field_name)) {
                $different_references = FALSE;
            }
        }
        $this->assertTrue($different_references, 'The entity object and the cloned entity object reference different field item list objects if the entity is cloned after an entity translation has been initialized.');
    }
    
    /**
     * Tests that the flag for enforcing a new revision is not shared.
     */
    public function testNewRevisionOnCloneEntityTranslation() : void {
        // Create a test entity.
        $entity = EntityTestMulRev::create([
            'name' => $this->randomString(),
            'language' => 'en',
        ]);
        $entity->save();
        $entity->addTranslation('de');
        $entity->save();
        // Reload the entity as ContentEntityBase::postCreate() forces the entity to
        // be a new revision.
        $entity = EntityTestMulRev::load($entity->id());
        $entity_translation = $entity->getTranslation('de');
        // The entity is not set to be a new revision.
        $this->assertFalse($entity_translation->isNewRevision());
        // The clone should not be set to be a new revision either.
        $clone = clone $entity_translation;
        $this->assertFalse($clone->isNewRevision());
        // After forcing the clone to be a new revision only it should be flagged
        // as a new revision, but the original entity should not.
        $clone->setNewRevision();
        $this->assertTrue($clone->isNewRevision());
        $this->assertFalse($entity_translation->isNewRevision());
    }
    
    /**
     * Tests modifications on entity keys of a cloned entity object.
     */
    public function testEntityKeysModifications() : void {
        // Create a test entity with a translation, which will internally trigger
        // entity cloning for the new translation and create references for some of
        // the entity properties.
        $entity = EntityTestMulRev::create([
            'name' => 'original-name',
            'uuid' => 'original-uuid',
            'language' => 'en',
        ]);
        $entity->addTranslation('de');
        $entity->save();
        // Clone the entity.
        $clone = clone $entity;
        // Alter a non-translatable and a translatable entity key fields of the
        // cloned entity and assert that retrieving the value through the entity
        // keys local cache will be different for the cloned and the original
        // entity.
        // We first have to call the ::uuid() and ::label() method on the original
        // entity as it is going to cache the field values into the $entityKeys and
        // $translatableEntityKeys properties of the entity object and we want to
        // check that the cloned and the original entity aren't sharing the same
        // reference to those local cache properties.
        $uuid_field_name = $entity->getEntityType()
            ->getKey('uuid');
        $this->assertFalse($entity->getFieldDefinition($uuid_field_name)
            ->isTranslatable());
        $clone->{$uuid_field_name}->value = 'clone-uuid';
        $this->assertEquals('original-uuid', $entity->uuid());
        $this->assertEquals('clone-uuid', $clone->uuid());
        $label_field_name = $entity->getEntityType()
            ->getKey('label');
        $this->assertTrue($entity->getFieldDefinition($label_field_name)
            ->isTranslatable());
        $clone->{$label_field_name}->value = 'clone-name';
        $this->assertEquals('original-name', $entity->label());
        $this->assertEquals('clone-name', $clone->label());
    }
    
    /**
     * Tests the field values after serializing an entity and its clone.
     */
    public function testFieldValuesAfterSerialize() : void {
        // Create a test entity with a translation, which will internally trigger
        // entity cloning for the new translation and create references for some of
        // the entity properties.
        $entity = EntityTestMulRev::create([
            'name' => 'original',
            'language' => 'en',
        ]);
        $entity->addTranslation('de');
        $entity->save();
        // Clone the entity.
        $clone = clone $entity;
        // Alter the name field value of the cloned entity object.
        $clone->setName('clone');
        // Serialize the entity and the cloned object in order to destroy the field
        // objects and put the field values into the entity property $values, so
        // that on accessing a field again it will be newly created with the value
        // from the $values property.
        serialize($entity);
        serialize($clone);
        // Assert that the original and the cloned entity both have different names.
        $this->assertEquals('original', $entity->getName());
        $this->assertEquals('clone', $clone->getName());
    }
    
    /**
     * Tests changing the default revision flag.
     */
    public function testDefaultRevision() : void {
        // Create a test entity with a translation, which will internally trigger
        // entity cloning for the new translation and create references for some of
        // the entity properties.
        $entity = EntityTestMulRev::create([
            'name' => 'original',
            'language' => 'en',
        ]);
        $entity->addTranslation('de');
        $entity->save();
        // Assert that the entity is in the default revision.
        $this->assertTrue($entity->isDefaultRevision());
        // Clone the entity and modify its default revision flag.
        $clone = clone $entity;
        $clone->isDefaultRevision(FALSE);
        // Assert that the clone is not in default revision, but the original entity
        // is still in the default revision.
        $this->assertFalse($clone->isDefaultRevision());
        $this->assertTrue($entity->isDefaultRevision());
    }
    
    /**
     * Tests references of entity properties after entity cloning.
     */
    public function testEntityPropertiesModifications() : void {
        // Create a test entity with a translation, which will internally trigger
        // entity cloning for the new translation and create references for some of
        // the entity properties.
        $entity = EntityTestMulRev::create([
            'name' => 'original',
            'language' => 'en',
        ]);
        $translation = $entity->addTranslation('de');
        $entity->save();
        // Clone the entity.
        $clone = clone $entity;
        // Retrieve the entity properties.
        $reflection = new \ReflectionClass($entity);
        $properties = $reflection->getProperties(~\ReflectionProperty::IS_STATIC);
        $translation_unique_properties = [
            'activeLangcode',
            'translationInitialize',
            'fieldDefinitions',
            'languages',
            'langcodeKey',
            'defaultLangcode',
            'defaultLangcodeKey',
            'revisionTranslationAffectedKey',
            'validated',
            'validationRequired',
            'entityTypeId',
            'typedData',
            'cacheContexts',
            'cacheTags',
            'cacheMaxAge',
            '_serviceIds',
            '_entityStorages',
            'enforceDefaultTranslation',
        ];
        foreach ($properties as $property) {
            $property_name = $property->getName();
            // Only modify properties that will accept strings as default values.
            if ($property->hasType()) {
                if ($property->getType()
                    ->getName() !== 'string') {
                    continue;
                }
            }
            // Modify each entity property on the clone and assert that the change is
            // not propagated to the original entity.
            $property->setValue($entity, 'default-value');
            $property->setValue($translation, 'default-value');
            $property->setValue($clone, 'test-entity-cloning');
            // Static properties remain the same across all instances of the class.
            if ($property->isStatic()) {
                $this->assertEquals('test-entity-cloning', $property->getValue($entity), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('test-entity-cloning', $property->getValue($translation), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('test-entity-cloning', $property->getValue($clone), "Entity property {$property_name} is not cloned properly.");
            }
            else {
                $this->assertEquals('default-value', $property->getValue($entity), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('default-value', $property->getValue($translation), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('test-entity-cloning', $property->getValue($clone), "Entity property {$property_name} is not cloned properly.");
            }
            // Modify each entity property on the translation entity object and assert
            // that the change is propagated to the default translation entity object
            // except for the properties that are unique for each entity translation
            // object.
            $property->setValue($translation, 'test-translation-cloning');
            // Using assertEquals or assertNotEquals here is dangerous as if the
            // assertion fails and the property for some reasons contains the entity
            // object e.g. the "typedData" property then the property will be
            // serialized, but this will cause exceptions because the entity is
            // modified in a non-consistent way and ContentEntityBase::__sleep() will
            // not be able to properly access all properties and this will cause
            // exceptions without a proper backtrace.
            if (in_array($property->getName(), $translation_unique_properties)) {
                $this->assertEquals('default-value', $property->getValue($entity), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('test-translation-cloning', $property->getValue($translation), "Entity property {$property_name} is not cloned properly.");
            }
            else {
                $this->assertEquals('test-translation-cloning', $property->getValue($entity), "Entity property {$property_name} is not cloned properly.");
                $this->assertEquals('test-translation-cloning', $property->getValue($translation), "Entity property {$property_name} is not cloned properly.");
            }
        }
    }

}