! Commit uncomitted VFS wrapper

app/code/community/EcomDev/PHPUnit/Model/Fixture/Vfs.php

+<?php
+/**
+ * PHP Unit test suite for Magento
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Open Software License (OSL 3.0)
+ * that is bundled with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://opensource.org/licenses/osl-3.0.php
+ *
+ * @category   EcomDev
+ * @package    EcomDev_PHPUnit
+ * @copyright  Copyright (c) 2012 EcomDev BV (http://www.ecomdev.org)
+ * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+ * @author     Ivan Chepurnyi <ivan.chepurnyi@ecomdev.org>
+ */
+
+use org\bovigo\vfs\vfsStream as Stream;
+use org\bovigo\vfs\vfsStreamWrapper as StreamWrapper;
+use org\bovigo\vfs\visitor\vfsStreamStructureVisitor as StreamVisitor;
+
+/**
+ * VFS library wrapper, to have simple api for manipulation with virtual fs
+ *
+ *
+ */
+class EcomDev_PHPUnit_Model_Fixture_Vfs
+{
+    /**
+     * Current root directory stack of the VFS before apply process were started
+     *
+     * @var array
+     */
+    protected $_currentRoot = array();
+
+    /**
+     * Initializes VFS stream wrapper/
+     */
+    public function __construct()
+    {
+        Stream::setup();
+    }
+
+    /**
+     * Applies VFS directory structure
+     *
+     * @param      $data
+     * @param bool $cloneCurrent
+     *
+     * @return EcomDev_PHPUnit_Model_Fixture_Vfs
+     */
+    public function apply($data, $cloneCurrent = false)
+    {
+        $this->_currentRoot[] = StreamWrapper::getRoot();
+        StreamWrapper::setRoot(Stream::newDirectory(uniqid('root')));
+        if ($cloneCurrent) {
+            $visitor = new StreamVisitor();
+            $visitor->visitDirectory(end($this->_currentRoot));
+            if ($visitor->getStructure()) {
+                Stream::create($visitor->getStructure());
+            }
+        }
+
+        Stream::create($data);
+        return $this;
+    }
+
+    /**
+     * Discards VFS file system changes
+     *
+     * @return EcomDev_PHPUnit_Model_Fixture_Vfs
+     */
+    public function discard()
+    {
+        if ($this->_currentRoot) {
+            StreamWrapper::setRoot(array_pop($this->_currentRoot));
+        }
+        return $this;
+    }
+
+    /**
+     * Returns stream wrapper url for operation
+     * via built-in fs functions
+     *
+     * @param string $path
+     * @return string
+     */
+    public function url($path)
+    {
+        return Stream::url($path);
+    }
+}