--- /dev/null
+<?php
+
+namespace Drupal\Tests\language\Functional;
+
+use Drupal\Component\Render\FormattableMarkup;
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationContentEntity;
+use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl;
+use Drupal\Tests\BrowserTestBase;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Route;
+
+/**
+ * Tests language negotiation with the language negotiator content entity.
+ *
+ * @group language
+ */
+class LanguageNegotiationContentEntityTest extends BrowserTestBase {
+
+ /**
+ * Modules to enable.
+ *
+ * @var array
+ */
+ public static $modules = ['language', 'language_test', 'entity_test', 'system'];
+
+ /**
+ * The entity being used for testing.
+ *
+ * @var \Drupal\Core\Entity\ContentEntityInterface
+ */
+ protected $entity;
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ ConfigurableLanguage::create(['id' => 'es'])->save();
+ ConfigurableLanguage::create(['id' => 'fr'])->save();
+
+ // In order to reflect the changes for a multilingual site in the container
+ // we have to rebuild it.
+ $this->rebuildContainer();
+
+ $this->createTranslatableEntity();
+
+ $user = $this->drupalCreateUser(['view test entity']);
+ $this->drupalLogin($user);
+ }
+
+ /**
+ * Tests default with content language remaining same as interface language.
+ */
+ public function testDefaultConfiguration() {
+ $translation = $this->entity;
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue(($last_interface_language == $last_content_language) && ($last_content_language == $translation->language()->getId()), new FormattableMarkup('Interface language %interface_language and Content language %content_language are the same as the translation language %translation_language of the entity.', ['%interface_language' => $last_interface_language, '%content_language' => $last_content_language, '%translation_language' => $translation->language()->getId()]));
+
+ $translation = $this->entity->getTranslation('es');
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue(($last_interface_language == $last_content_language) && ($last_content_language == $translation->language()->getId()), new FormattableMarkup('Interface language %interface_language and Content language %content_language are the same as the translation language %translation_language of the entity.', ['%interface_language' => $last_interface_language, '%content_language' => $last_content_language, '%translation_language' => $translation->language()->getId()]));
+
+ $translation = $this->entity->getTranslation('fr');
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue(($last_interface_language == $last_content_language) && ($last_content_language == $translation->language()->getId()), new FormattableMarkup('Interface language %interface_language and Content language %content_language are the same as the translation language %translation_language of the entity.', ['%interface_language' => $last_interface_language, '%content_language' => $last_content_language, '%translation_language' => $translation->language()->getId()]));
+ }
+
+ /**
+ * Tests enabling the language negotiator language_content_entity.
+ */
+ public function testEnabledLanguageContentNegotiator() {
+ // Define the method language-url with a higher priority than
+ // language-content-entity. This configuration should match the default one,
+ // where the language-content-entity is turned off.
+ $config = $this->config('language.types');
+ $config->set('configurable', [LanguageInterface::TYPE_INTERFACE, LanguageInterface::TYPE_CONTENT]);
+ $config->set('negotiation.language_content.enabled', [
+ LanguageNegotiationUrl::METHOD_ID => 0,
+ LanguageNegotiationContentEntity::METHOD_ID => 1
+ ]);
+ $config->save();
+
+ // In order to reflect the changes for a multilingual site in the container
+ // we have to rebuild it.
+ $this->rebuildContainer();
+
+ // The tests for the default configuration should still pass.
+ $this->testDefaultConfiguration();
+
+ // Define the method language-content-entity with a higher priority than
+ // language-url.
+ $config->set('negotiation.language_content.enabled', [
+ LanguageNegotiationContentEntity::METHOD_ID => 0,
+ LanguageNegotiationUrl::METHOD_ID => 1
+ ]);
+ $config->save();
+
+ // In order to reflect the changes for a multilingual site in the container
+ // we have to rebuild it.
+ $this->rebuildContainer();
+
+ // The method language-content-entity should run before language-url and
+ // append query parameter for the content language and prevent language-url
+ // from overwriting the URL.
+ $default_site_langcode = $this->config('system.site')->get('default_langcode');
+
+ // Now switching to an entity route, so that the URL links are generated
+ // while being on an entity route.
+ $this->setCurrentRequestForRoute('/entity_test/{entity_test}', 'entity.entity_test.canonical');
+
+ $translation = $this->entity;
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue(($last_interface_language == $default_site_langcode) && ($last_interface_language == $last_content_language) && ($last_content_language == $translation->language()->getId()), 'Interface language and Content language are the same as the default translation language of the entity.');
+ $this->assertTrue($last_interface_language == $default_site_langcode, 'Interface language did not change from the default site language.');
+ $this->assertTrue($last_content_language == $translation->language()->getId(), 'Content language matches the current entity translation language.');
+
+ $translation = $this->entity->getTranslation('es');
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue($last_interface_language == $default_site_langcode, 'Interface language did not change from the default site language.');
+ $this->assertTrue($last_content_language == $translation->language()->getId(), 'Content language matches the current entity translation language.');
+
+ $translation = $this->entity->getTranslation('fr');
+ $this->drupalGet($translation->urlInfo());
+ $last = $this->container->get('state')->get('language_test.language_negotiation_last');
+ $last_content_language = $last[LanguageInterface::TYPE_CONTENT];
+ $last_interface_language = $last[LanguageInterface::TYPE_INTERFACE];
+ $this->assertTrue($last_interface_language == $default_site_langcode, 'Interface language did not change from the default site language.');
+ $this->assertTrue($last_content_language == $translation->language()->getId(), 'Content language matches the current entity translation language.');
+ }
+
+ /**
+ * Creates a translated entity.
+ */
+ protected function createTranslatableEntity() {
+ $this->entity = EntityTest::create();
+ $this->entity->addTranslation('es', ['name' => 'name spanish']);
+ $this->entity->addTranslation('fr', ['name' => 'name french']);
+ $this->entity->save();
+ }
+
+ /**
+ * Sets the current request to a specific path with the corresponding route.
+ *
+ * @param string $path
+ * The path for which the current request should be created.
+ * @param string $route_name
+ * The route name for which the route object for the request should be
+ * created.
+ */
+ protected function setCurrentRequestForRoute($path, $route_name) {
+ $request = Request::create($path);
+ $request->attributes->set(RouteObjectInterface::ROUTE_NAME, $route_name);
+ $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, new Route($path));
+ $this->container->get('request_stack')->push($request);
+ }
+
+}