Add Composer autoloading functions and PHPStan for testing

vendor/symfony/finder/Tests/Iterator/Iterator.php

@@ -0,0 +1,55 @@
+<?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\Finder\Tests\Iterator;
+
+class Iterator implements \Iterator
+{
+    protected $values = [];
+
+    public function __construct(array $values = [])
+    {
+        foreach ($values as $value) {
+            $this->attach(new \SplFileInfo($value));
+        }
+        $this->rewind();
+    }
+
+    public function attach(\SplFileInfo $fileinfo)
+    {
+        $this->values[] = $fileinfo;
+    }
+
+    public function rewind()
+    {
+        reset($this->values);
+    }
+
+    public function valid()
+    {
+        return false !== $this->current();
+    }
+
+    public function next()
+    {
+        next($this->values);
+    }
+
+    public function current()
+    {
+        return current($this->values);
+    }
+
+    public function key()
+    {
+        return key($this->values);
+    }
+}