add XCache backend and testcases for OC_Cache

lib/cache/xcache.php

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+<?php
+/**
+ * Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+
+class OC_Cache_XCache{
+	/**
+	 * entries in XCache gets namespaced to prevent collisions between owncloud instaces and users
+	 */
+	protected function getNameSpace() {
+		return OC_Util::getInstanceId().'/'.OC_User::getUser().'/';
+	}
+
+	public function get($key) {
+		return xcache_get($this->getNamespace().$key);
+	}
+
+	public function set($key, $value, $ttl=0) {
+		if($ttl>0){
+			return xcache_set($this->getNamespace().$key,$value,$ttl);
+		}else{
+			return xcache_set($this->getNamespace().$key,$value);
+		}
+	}
+
+	public function remove($key) {
+		return xcache_unset($this->getNamespace().$key);
+	}
+
+	public function clear(){
+		return xcache_unset_by_prefix($this->getNamespace());
+	}
+}

tests/lib/cache.php

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+<?php
+/**
+ * Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+abstract class Test_Cache extends UnitTestCase {
+	/**
+	 * @var OC_Cache cache;
+	 */
+	protected $instance;
+
+	public function tearDown(){
+		$this->instance->clear();
+	}
+
+	function testSimple(){
+		$this->assertNull($this->instance->get('value1'));
+		
+		$value='foobar';
+		$this->instance->set('value1',$value);
+		$received=$this->instance->get('value1');
+		$this->assertEqual($value,$received,'Value recieved from cache not equal to the original');
+		$value='ipsum lorum';
+		$this->instance->set('value1',$value);
+		$received=$this->instance->get('value1');
+		$this->assertEqual($value,$received,'Value not overwritten by seccond set');
+
+		$value2='foobar';
+		$this->instance->set('value2',$value2);
+		$received2=$this->instance->get('value2');
+		$this->assertEqual($value,$received,'Value changed while setting other variable');
+		$this->assertEqual($value2,$received2,'Seccond value not equal to original');
+
+		$this->assertNull($this->instance->get('not_set'),'Unset value not equal to null');
+	}
+
+	function testTTL(){
+	}
+}

tests/lib/cache/file.php

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+<?php
+/**
+* ownCloud
+*
+* @author Robin Appelman
+* @copyright 2012 Robin Appelman icewind@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/>.
+*
+*/
+
+class Test_Cache_File extends Test_Cache {
+	public function setUp(){
+		$this->instance=new OC_Cache_File();
+	}
+}

tests/lib/cache/xcache.php

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+<?php
+/**
+* ownCloud
+*
+* @author Robin Appelman
+* @copyright 2012 Robin Appelman icewind@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/>.
+*
+*/
+
+class Test_Cache_XCache extends Test_Cache {
+	public function setUp(){
+		$this->instance=new OC_Cache_XCache();
+	}
+}