LegacyHookTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Extension;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the LegacyHook attribute.
 *
 * @group Hook
 */
class LegacyHookTest extends BrowserTestBase {
    protected static $modules = [
        'legacy_hook_test',
    ];
    protected $defaultTheme = 'stark';
    public function testLegacyHook() : void {
        // Calling legacy_hook_test1 leads to a fatal error so there's no need
        // for asserts to show it does not get called.
        \Drupal::moduleHandler()->invokeAll('test1');
        // Verify the module actually exists and works even with one LegacyHook.
        $result = \Drupal::moduleHandler()->invokeAll('test2');
        $this->assertSame([
            'ok',
        ], $result);
        \Drupal::moduleHandler()->invoke('legacy_hook_test', 'test1');
        $result = \Drupal::moduleHandler()->invoke('legacy_hook_test', 'test2');
        $this->assertSame('ok', $result);
    }

}