--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Parameter;
+
+class ParameterTest extends TestCase
+{
+ public function testConstructor()
+ {
+ $ref = new Parameter('foo');
+ $this->assertEquals('foo', (string) $ref, '__construct() sets the id of the parameter, which is used for the __toString() method');
+ }
+}