adding StartSessionListener which initializes the session before each test case execution

tests/phpunit-autotest.xml

@@ -36,6 +36,7 @@
 		</whitelist>
 	</filter>
 	<listeners>
+		<listener class="StartSessionListener" file="startsessionlistener.php" />
 	  <listener class="TestCleanupListener" file="testcleanuplistener.php">
 		<arguments>
 			<string>detail</string>

tests/phpunit.xml.dist

@@ -29,4 +29,7 @@
 			</exclude>
 		</whitelist>
 	</filter>
+	<listeners>
+		<listener class="StartSessionListener" file="startsessionlistener.php" />
+	</listeners>
 </phpunit>

tests/startsessionlistener.php

+<?php
+/**
+ * Copyright (c) 2014 Thomas Müller <deepdiver@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+/**
+ * Starts a new session before each test execution
+ */
+class StartSessionListener implements PHPUnit_Framework_TestListener {
+
+	public function addError(PHPUnit_Framework_Test $test, Exception $e, $time) {
+	}
+
+	public function addFailure(PHPUnit_Framework_Test $test, PHPUnit_Framework_AssertionFailedError $e, $time) {
+	}
+
+	public function addIncompleteTest(PHPUnit_Framework_Test $test, Exception $e, $time) {
+	}
+
+	public function addSkippedTest(PHPUnit_Framework_Test $test, Exception $e, $time) {
+	}
+
+	public function startTest(PHPUnit_Framework_Test $test) {
+
+		// new session
+		\OC::$session = new \OC\Session\Memory('');
+
+		// load the version
+		OC_Util::getVersion();
+
+	}
+
+	public function endTest(PHPUnit_Framework_Test $test, $time) {
+	}
+
+	public function startTestSuite(PHPUnit_Framework_TestSuite $suite) {
+	}
+
+	public function endTestSuite(PHPUnit_Framework_TestSuite $suite) {
+	}
+
+}