RequirementsTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Kernel\Module;

use Drupal\KernelTests\KernelTestBase;

/**
 * Covers hook_requirements and hook_requirements_alter.
 * @group Module
 */
class RequirementsTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'requirements1_test',
        'system',
    ];
    
    /**
     * Tests requirements data altering.
     */
    public function testRequirementsAlter() : void {
        $requirements = $this->container
            ->get('system.manager')
            ->listRequirements();
        // @see requirements1_test_requirements_alter()
        $this->assertEquals('Requirements 1 Test - Changed', $requirements['requirements1_test_alterable']['title']);
        $this->assertEquals(REQUIREMENT_WARNING, $requirements['requirements1_test_alterable']['severity']);
        $this->assertArrayNotHasKey('requirements1_test_deletable', $requirements);
    }

}