unit test testSetAppValueIfSetToNull() added

tests/lib/public/config.php

@@ -0,0 +1,37 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Thomas Müller
+ * @copyright 2014 Thomas Müller thomas.mueller@tmit.eu
+ *
+ * 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_Config extends PHPUnit_Framework_TestCase
+{
+
+	public function testSetAppValueIfSetToNull() {
+
+		$key = uniqid("key-");
+
+		$result = \OCP\Config::setAppValue('unit-test', $key, null);
+		$this->assertTrue($result);
+
+		$result = \OCP\Config::setAppValue('unit-test', $key, '12');
+		$this->assertTrue($result);
+
+	}
+
+}