Added vendor directory to source control

vendor/symfony/http-foundation/Test/Constraint/ResponseHasHeader.php

@@ -0,0 +1,53 @@
+<?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\HttpFoundation\Test\Constraint;
+
+use PHPUnit\Framework\Constraint\Constraint;
+use Symfony\Component\HttpFoundation\Response;
+
+final class ResponseHasHeader extends Constraint
+{
+    private $headerName;
+
+    public function __construct(string $headerName)
+    {
+        $this->headerName = $headerName;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toString(): string
+    {
+        return sprintf('has header "%s"', $this->headerName);
+    }
+
+    /**
+     * @param Response $response
+     *
+     * {@inheritdoc}
+     */
+    protected function matches($response): bool
+    {
+        return $response->headers->has($this->headerName);
+    }
+
+    /**
+     * @param Response $response
+     *
+     * {@inheritdoc}
+     */
+    protected function failureDescription($response): string
+    {
+        return 'the Response '.$this->toString();
+    }
+}