ContentTranslationLinkTagTest.php

<?php

namespace Drupal\Tests\content_translation\Functional;

use Drupal\Core\Url;
use Drupal\Tests\BrowserTestBase;
use Drupal\language\Entity\ConfigurableLanguage;
use Drupal\entity_test\Entity\EntityTestMul;
use Drupal\content_translation_test\Entity\EntityTestTranslatableNoUISkip;

/**
 * Tests whether canonical link tags are present for content entities.
 *
 * @group content_translation
 */
class ContentTranslationLinkTagTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'entity_test',
        'content_translation',
        'content_translation_test',
        'language',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The added languages.
     *
     * @var string[]
     */
    protected $langcodes;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Set up user.
        $user = $this->drupalCreateUser([
            'view test entity',
            'view test entity translations',
            'administer entity_test content',
        ]);
        $this->drupalLogin($user);
        // Add additional languages.
        $this->langcodes = [
            'it',
            'fr',
        ];
        foreach ($this->langcodes as $langcode) {
            ConfigurableLanguage::createFromLangcode($langcode)->save();
        }
        // Rebuild the container so that the new languages are picked up by services
        // that hold a list of languages.
        $this->rebuildContainer();
    }
    
    /**
     * Create a test entity with translations.
     *
     * @return \Drupal\Core\Entity\EntityInterface
     *   An entity with translations.
     */
    protected function createTranslatableEntity() {
        $entity = EntityTestMul::create([
            'label' => $this->randomString(),
        ]);
        // Create translations for non default languages.
        foreach ($this->langcodes as $langcode) {
            $entity->addTranslation($langcode, [
                'label' => $this->randomString(),
            ]);
        }
        $entity->save();
        return $entity;
    }
    
    /**
     * Tests alternate link tag found for entity types with canonical links.
     */
    public function testCanonicalAlternateTags() {
        
        /** @var \Drupal\Core\Language\LanguageManagerInterface $languageManager */
        $languageManager = $this->container
            ->get('language_manager');
        
        /** @var \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager */
        $entityTypeManager = $this->container
            ->get('entity_type.manager');
        $definition = $entityTypeManager->getDefinition('entity_test_mul');
        $this->assertTrue($definition->hasLinkTemplate('canonical'), 'Canonical link template found for entity_test.');
        $entity = $this->createTranslatableEntity();
        $url_base = $entity->toUrl('canonical')
            ->setAbsolute();
        $langcodes_all = $this->langcodes;
        $langcodes_all[] = $languageManager->getDefaultLanguage()
            ->getId();
        
        /** @var \Drupal\Core\Url[] $urls */
        $urls = array_map(function ($langcode) use ($url_base, $languageManager) {
            $url = clone $url_base;
            return $url->setOption('language', $languageManager->getLanguage($langcode));
        }, array_combine($langcodes_all, $langcodes_all));
        // Ensure link tags for all languages are found on each language variation
        // page of an entity.
        foreach ($urls as $langcode => $url) {
            $this->drupalGet($url);
            foreach ($urls as $langcode_alternate => $url_alternate) {
                $this->assertSession()
                    ->elementAttributeContains('xpath', "head/link[@rel='alternate' and @hreflang='{$langcode_alternate}']", 'href', $url_alternate->toString());
            }
        }
        // Configure entity path as a front page.
        $entity_canonical = '/entity_test_mul/manage/' . $entity->id();
        $this->config('system.site')
            ->set('page.front', $entity_canonical)
            ->save();
        // Tests hreflang when using entities as a front page.
        foreach ($urls as $langcode => $url) {
            $this->drupalGet($url);
            foreach ($entity->getTranslationLanguages() as $language) {
                $frontpage_path = Url::fromRoute('<front>', [], [
                    'absolute' => TRUE,
                    'language' => $language,
                ])->toString();
                $this->assertSession()
                    ->elementAttributeContains('xpath', "head/link[@rel='alternate' and @hreflang='{$language->getId()}']", 'href', $frontpage_path);
            }
        }
    }
    
    /**
     * Tests alternate link tag missing for entity types without canonical links.
     */
    public function testCanonicalAlternateTagsMissing() {
        
        /** @var \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager */
        $entityTypeManager = $this->container
            ->get('entity_type.manager');
        $definition = $entityTypeManager->getDefinition('entity_test_translatable_no_skip');
        // Ensure 'canonical' link template does not exist, in case it is added in
        // the future.
        $this->assertFalse($definition->hasLinkTemplate('canonical'), 'Canonical link template does not exist for entity_test_translatable_no_skip entity.');
        $entity = EntityTestTranslatableNoUISkip::create();
        $entity->save();
        $this->drupalGet($entity->toUrl('edit-form'));
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->elementNotExists('xpath', '//link[@rel="alternate" and @hreflang]');
    }

}