test files external amazon s3 storage id migration

diff --git a/apps/files_external/tests/amazons3migration.php b/apps/files_external/tests/amazons3migration.php
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+++ b/apps/files_external/tests/amazons3migration.php
@@ -0,0 +1,117 @@
+<?php
+
+/**
+ * ownCloud
+ *
+ * @author Jörn Friedrich Dreyer
+ * @copyright 2012 Jörn Friedrich Dreyer jfd@owncloud.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+namespace Test\Files\Storage;
+
+class AmazonS3Migration extends \PHPUnit_Framework_TestCase {
+
+       /**
+        * @var \OC\Files\Storage\Storage instance
+        */
+       protected $instance;
+
+       public function setUp () {
+               $uuid = uniqid();
+
+               $this->params['key'] = 'key'.$uuid;
+               $this->params['secret'] = 'secret'.$uuid;
+               $this->params['bucket'] = 'bucket'.$uuid;
+
+               $this->oldId = 'amazon::' . $this->params['key'] . md5($this->params['secret']);
+               $this->newId = 'amazon::' . $this->params['bucket'];
+       }
+
+       public function tearDown () {
+               $this->deleteStorage($this->oldId);
+               $this->deleteStorage($this->newId);
+       }
+
+       public function testUpdateLegacyOnlyId () {
+               // add storage ids
+               $oldCache = new \OC\Files\Cache\Cache($this->oldId);
+
+               // add file to old cache
+               $fileId = $oldCache->put('/', array('size' => 0, 'mtime' => time(), 'mimetype' => 'httpd/directory'));
+
+               try {
+                       $this->instance = new \OC\Files\Storage\AmazonS3($this->params);
+               } catch (\Exception $e) {
+                       //ignore
+               }
+               $storages = $this->getStorages();
+
+               $this->assertTrue(isset($storages[$this->newId]));
+               $this->assertFalse(isset($storages[$this->oldId]));
+               $this->assertSame((int)$oldCache->getNumericStorageId(), (int)$storages[$this->newId]);
+
+               list($storageId, $path) = \OC\Files\Cache\Cache::getById($fileId);
+
+               $this->assertSame($this->newId, $storageId);
+               $this->assertSame('/', $path);
+       }
+
+       public function testUpdateLegacyAndNewId () {
+               // add storage ids
+
+               $oldCache = new \OC\Files\Cache\Cache($this->oldId);
+               new \OC\Files\Cache\Cache($this->newId);
+
+               // add file to old cache
+               $fileId = $oldCache->put('/', array('size' => 0, 'mtime' => time(), 'mimetype' => 'httpd/directory'));
+
+               try {
+                       $this->instance = new \OC\Files\Storage\AmazonS3($this->params);
+               } catch (\Exception $e) {
+                       //ignore
+               }
+               $storages = $this->getStorages();
+
+               $this->assertTrue(isset($storages[$this->newId]));
+               $this->assertFalse(isset($storages[$this->oldId]));
+
+               $this->assertNull(\OC\Files\Cache\Cache::getById($fileId), 'old filecache has not been cleared');
+       }
+
+       /**
+        * @param $storages
+        * @return array
+        */
+       public function getStorages() {
+               $storages = array();
+               $stmt = \OC::$server->getDatabaseConnection()->prepare(
+                       'SELECT `numeric_id`, `id` FROM `*PREFIX*storages` WHERE `id` IN (?, ?)'
+               );
+               $stmt->execute(array($this->oldId, $this->newId));
+               while ($row = $stmt->fetch()) {
+                       $storages[$row['id']] = $row['numeric_id'];
+               }
+               return $storages;
+       }
+
+       public function deleteStorage($id) {
+               $stmt = \OC::$server->getDatabaseConnection()->prepare(
+                       'DELETE FROM `*PREFIX*storages` WHERE `id` = ?'
+               );
+               $stmt->execute(array($id));
+       }
+}
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