ModuleHandlerTest.php

<?php

namespace Drupal\KernelTests\Core\Extension;

use Drupal\Core\Extension\Exception\UnknownExtensionException;
use Drupal\KernelTests\KernelTestBase;

/**
 * @coversDefaultClass \Drupal\Core\Extension\ModuleHandler
 *
 * @group Extension
 */
class ModuleHandlerTest extends KernelTestBase {
    
    /**
     * Tests requesting the name of an invalid module.
     *
     * @covers ::getName
     */
    public function testInvalidGetName() {
        $this->expectException(UnknownExtensionException::class);
        $this->expectExceptionMessage('The module module_nonsense does not exist.');
        $module_handler = $this->container
            ->get('module_handler');
        $module_handler->getName('module_nonsense');
    }

}