LanguageSelectElementTest.php

<?php

namespace Drupal\Tests\system\Functional\Form;

use Drupal\Component\Serialization\Json;
use Drupal\Core\Language\LanguageInterface;
use Drupal\language\Entity\ConfigurableLanguage;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests the language selection form element.
 *
 * @group Form
 */
class LanguageSelectElementTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'form_test',
        'language',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests that the options printed by the language select element are correct.
     */
    public function testLanguageSelectElementOptions() {
        // Add some languages.
        ConfigurableLanguage::create([
            'id' => 'aaa',
            'label' => $this->randomMachineName(),
        ])
            ->save();
        ConfigurableLanguage::create([
            'id' => 'bbb',
            'label' => $this->randomMachineName(),
        ])
            ->save();
        \Drupal::languageManager()->reset();
        $this->drupalGet('form-test/language_select');
        // Check that the language fields were rendered on the page.
        $ids = [
            'edit-languages-all' => LanguageInterface::STATE_ALL,
            'edit-languages-configurable' => LanguageInterface::STATE_CONFIGURABLE,
            'edit-languages-locked' => LanguageInterface::STATE_LOCKED,
            'edit-languages-config-and-locked' => LanguageInterface::STATE_CONFIGURABLE | LanguageInterface::STATE_LOCKED,
        ];
        foreach ($ids as $id => $flags) {
            $this->assertSession()
                ->fieldExists($id);
            $options = [];
            
            /** @var \Drupal\Core\Language\LanguageManagerInterface $language_manager */
            $language_manager = $this->container
                ->get('language_manager');
            foreach ($language_manager->getLanguages($flags) as $langcode => $language) {
                $options[$langcode] = $language->isLocked() ? "- {$language->getName()} -" : $language->getName();
            }
            $this->_testLanguageSelectElementOptions($id, $options);
        }
        // Test that the #options were not altered by #languages.
        $this->assertSession()
            ->fieldExists('edit-language-custom-options');
        $this->_testLanguageSelectElementOptions('edit-language-custom-options', [
            'opt1' => 'First option',
            'opt2' => 'Second option',
            'opt3' => 'Third option',
        ]);
    }
    
    /**
     * Tests the case when the language select elements should not be printed.
     *
     * This happens when the language module is disabled.
     */
    public function testHiddenLanguageSelectElement() {
        // Disable the language module, so that the language select field will not
        // be rendered.
        $this->container
            ->get('module_installer')
            ->uninstall([
            'language',
        ]);
        $this->drupalGet('form-test/language_select');
        // Check that the language fields were rendered on the page.
        $ids = [
            'edit-languages-all',
            'edit-languages-configurable',
            'edit-languages-locked',
            'edit-languages-config-and-locked',
        ];
        foreach ($ids as $id) {
            $this->assertSession()
                ->fieldNotExists($id);
        }
        // Check that the submitted values were the default values of the language
        // field elements.
        $edit = [];
        $this->submitForm($edit, 'Submit');
        $values = Json::decode($this->getSession()
            ->getPage()
            ->getContent());
        $this->assertEquals('xx', $values['languages_all']);
        $this->assertEquals('en', $values['languages_configurable']);
        $this->assertEquals(LanguageInterface::LANGCODE_NOT_SPECIFIED, $values['languages_locked']);
        $this->assertEquals('dummy_value', $values['languages_config_and_locked']);
        $this->assertEquals('opt2', $values['language_custom_options']);
    }
    
    /**
     * Helper function to check the options of a language select form element.
     *
     * @param string $id
     *   The id of the language select element to check.
     * @param array $options
     *   An array with options to compare with.
     */
    protected function _testLanguageSelectElementOptions($id, $options) {
        // Check that the options in the language field are exactly the same,
        // including the order, as the languages sent as a parameter.
        $found_options = $this->assertSession()
            ->selectExists($id)
            ->findAll('css', 'option');
        $found_options = array_map(function ($item) {
            return $item->getText();
        }, $found_options);
        $this->assertEquals(array_values($options), $found_options);
    }

}