CurrentThemeConditionTest.php

<?php

namespace Drupal\KernelTests\Core\Plugin\Condition;

use Drupal\Component\Render\FormattableMarkup;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the CurrentThemeCondition plugin.
 *
 * @group Condition
 */
class CurrentThemeConditionTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'theme_test',
    ];
    
    /**
     * Tests the current theme condition.
     */
    public function testCurrentTheme() {
        \Drupal::service('theme_installer')->install([
            'test_theme',
        ]);
        $manager = \Drupal::service('plugin.manager.condition');
        
        /** @var \Drupal\Core\Condition\ConditionInterface $condition */
        $condition = $manager->createInstance('current_theme');
        $condition->setConfiguration([
            'theme' => 'test_theme',
        ]);
        
        /** @var \Drupal\Core\Condition\ConditionInterface $condition_negated */
        $condition_negated = $manager->createInstance('current_theme');
        $condition_negated->setConfiguration([
            'theme' => 'test_theme',
            'negate' => TRUE,
        ]);
        $this->assertEquals(new FormattableMarkup('The current theme is @theme', [
            '@theme' => 'test_theme',
        ]), $condition->summary());
        $this->assertEquals(new FormattableMarkup('The current theme is not @theme', [
            '@theme' => 'test_theme',
        ]), $condition_negated->summary());
        // The expected theme has not been set up yet.
        $this->assertFalse($condition->execute());
        $this->assertTrue($condition_negated->execute());
        // Set the expected theme to be used.
        $this->config('system.theme')
            ->set('default', 'test_theme')
            ->save();
        \Drupal::theme()->resetActiveTheme();
        $this->assertTrue($condition->execute());
        $this->assertFalse($condition_negated->execute());
    }

}