class ConfigTranslationUiThemeTest

class ConfigTranslationUiThemeTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'config_translation',
        'config_translation_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Languages to enable.
     *
     * @var array
     */
    protected $langcodes = [
        'fr',
        'ta',
    ];
    
    /**
     * Administrator user for tests.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $admin_permissions = [
            'administer themes',
            'administer languages',
            'administer site configuration',
            'translate configuration',
        ];
        // Create and log in user.
        $this->adminUser = $this->drupalCreateUser($admin_permissions);
        // Add languages.
        foreach ($this->langcodes as $langcode) {
            ConfigurableLanguage::createFromLangcode($langcode)->save();
        }
    }
    
    /**
     * Tests that theme provided *.config_translation.yml files are found.
     */
    public function testThemeDiscovery() : void {
        // Install the test theme and rebuild routes.
        $theme = 'config_translation_test_theme';
        $this->drupalLogin($this->adminUser);
        $this->drupalGet('admin/appearance');
        $element = $this->assertSession()
            ->elementExists('xpath', "//a[normalize-space()='Install and set as default' and contains(@href, '{$theme}')]");
        $this->drupalGet($this->getAbsoluteUrl($element->getAttribute('href')), [
            'external' => TRUE,
        ]);
        $translation_base_url = 'admin/config/development/performance/translate';
        $this->drupalGet($translation_base_url);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->linkByHrefExists("{$translation_base_url}/fr/add");
    }

}