ComposerValidateTest.php

<?php

namespace Drupal\BuildTests\Composer;

use Drupal\BuildTests\Framework\BuildTestBase;
use Drupal\Tests\Composer\ComposerIntegrationTrait;

/**
 * @group Composer
 * @requires externalCommand composer
 */
class ComposerValidateTest extends BuildTestBase {
    use ComposerIntegrationTrait;
    public function provideComposerJson() {
        $data = [];
        $composer_json_finder = $this->getComposerJsonFinder($this->getDrupalRoot());
        foreach ($composer_json_finder->getIterator() as $composer_json) {
            $data[] = [
                $composer_json->getPathname(),
            ];
        }
        return $data;
    }
    
    /**
     * @dataProvider provideComposerJson
     */
    public function testValidateComposer($path) {
        $this->executeCommand('composer validate --strict --no-check-all ' . $path);
        $this->assertCommandSuccessful();
    }

}