ThemeInfoTest.php

<?php

namespace Drupal\Tests\system\Functional\Theme;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests processing of theme .info.yml properties.
 *
 * @group Theme
 */
class ThemeInfoTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'theme_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The theme installer used in this test for enabling themes.
     *
     * @var \Drupal\Core\Extension\ThemeInstallerInterface
     */
    protected $themeInstaller;
    
    /**
     * The theme manager used in this test.
     *
     * @var \Drupal\Core\Theme\ThemeManagerInterface
     */
    protected $themeManager;
    
    /**
     * The state service used in this test.
     *
     * @var \Drupal\Core\State\StateInterface
     */
    protected $state;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->themeInstaller = $this->container
            ->get('theme_installer');
        $this->themeManager = $this->container
            ->get('theme.manager');
        $this->state = $this->container
            ->get('state');
    }
    
    /**
     * Tests stylesheets-remove.
     */
    public function testStylesheets() {
        $this->themeInstaller
            ->install([
            'test_basetheme',
            'test_subtheme',
        ]);
        $this->config('system.theme')
            ->set('default', 'test_subtheme')
            ->save();
        $base = $this->getThemePath('test_basetheme');
        $sub = $this->getThemePath('test_subtheme') . '/css';
        // All removals are expected to be based on a file's path and name and
        // should work nevertheless.
        $this->drupalGet('theme-test/info/stylesheets');
        $this->assertSession()
            ->elementsCount('xpath', '//link[contains(@href, "' . $base . '/base-add.css")]', 1);
        $this->assertSession()
            ->elementNotExists('xpath', '//link[contains(@href, "base-remove.css")]');
        $this->assertSession()
            ->elementsCount('xpath', '//link[contains(@href, "' . $sub . '/sub-add.css")]', 1);
        $this->assertSession()
            ->elementNotExists('xpath', '//link[contains(@href, "sub-remove.css")]');
        $this->assertSession()
            ->elementNotExists('xpath', '//link[contains(@href, "base-add.sub-remove.css")]');
        // Verify that CSS files with the same name are loaded from both the base theme and subtheme.
        $this->assertSession()
            ->elementsCount('xpath', '//link[contains(@href, "' . $base . '/samename.css")]', 1);
        $this->assertSession()
            ->elementsCount('xpath', '//link[contains(@href, "' . $sub . '/samename.css")]', 1);
    }
    
    /**
     * Tests that changes to the info file are picked up.
     */
    public function testChanges() {
        $this->themeInstaller
            ->install([
            'test_theme',
        ]);
        $this->config('system.theme')
            ->set('default', 'test_theme')
            ->save();
        $this->themeManager
            ->resetActiveTheme();
        $active_theme = $this->themeManager
            ->getActiveTheme();
        // Make sure we are not testing the wrong theme.
        $this->assertEquals('test_theme', $active_theme->getName());
        $this->assertEquals([
            'starterkit_theme/base',
            'starterkit_theme/messages',
            'core/normalize',
            'test_theme/global-styling',
        ], $active_theme->getLibraries());
        // @see theme_test_system_info_alter()
        $this->state
            ->set('theme_test.modify_info_files', TRUE);
        $this->resetAll();
        $active_theme = $this->themeManager
            ->getActiveTheme();
        $this->assertEquals([
            'starterkit_theme/base',
            'starterkit_theme/messages',
            'core/normalize',
            'test_theme/global-styling',
            'core/once',
        ], $active_theme->getLibraries());
    }

}