class ActiveThemeLegacyTest

class ActiveThemeLegacyTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * Tests \Drupal\Core\Theme\ActiveTheme::getBaseThemes() deprecation.
     *
     * @covers ::getBaseThemes
     * @expectedDeprecation \Drupal\Core\Theme\ActiveTheme::getBaseThemes() is deprecated in Drupal 8.7.0 and will be removed before Drupal 9.0.0. Use \Drupal\Core\Theme\ActiveTheme::getBaseThemeExtensions() instead. See https://www.drupal.org/node/3019948
     */
    public function testGetBaseThemes() {
        $this->container
            ->get('theme_installer')
            ->install([
            'test_subsubtheme',
        ]);
        $this->config('system.theme')
            ->set('default', 'test_subsubtheme')
            ->save();
        $active_theme = \Drupal::theme()->getActiveTheme();
        // Ensure that active theme representations of base themes can be retrieved.
        $base_themes = $active_theme->getBaseThemes();
        $this->assertInstanceOf(ActiveTheme::class, $base_themes['test_subtheme']);
        $this->assertSame([
            'test_subtheme',
            'test_basetheme',
        ], array_keys($base_themes));
        // Ensure that we can get base themes from base themes.
        $test_subtheme_base_themes = $base_themes['test_subtheme']->getBaseThemes();
        $this->assertSame([
            'test_basetheme',
        ], array_keys($test_subtheme_base_themes));
        $this->assertEmpty($test_subtheme_base_themes['test_basetheme']->getBaseThemes());
    }
    
    /**
     * Tests BC layer in constructor.
     *
     * @covers ::__construct
     * @expectedDeprecation The 'base_themes' key is deprecated in Drupal 8.7.0  and support for it will be removed in Drupal 9.0.0. Use 'base_theme_extensions' instead. See https://www.drupal.org/node/3019948
     */
    public function testConstructor() {
        $themes = $this->container
            ->get('extension.list.theme')
            ->getList();
        $values = [
            'name' => $themes['test_basetheme']->getName(),
            'extension' => $themes['test_basetheme'],
        ];
        $base_active_theme = new ActiveTheme($values);
        $values = [
            'name' => $themes['test_subtheme']->getName(),
            'extension' => $themes['test_subtheme'],
            'base_themes' => [
                'test_basetheme' => $base_active_theme,
            ],
        ];
        $active_theme = new ActiveTheme($values);
        $base_extensions = $active_theme->getBaseThemeExtensions();
        $this->assertSame($base_extensions['test_basetheme'], $themes['test_basetheme']);
        $this->assertSame([
            'test_basetheme',
        ], array_keys($base_extensions));
    }

}