diff --git a/tests/functions/fixtures/obtain_online.xml b/tests/functions/fixtures/obtain_online.xml
new file mode 100644
index 0000000000..ea4d6f9238
--- /dev/null
+++ b/tests/functions/fixtures/obtain_online.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<dataset>
+	<table name="phpbb_sessions">
+		<column>session_id</column>
+		<column>session_user_id</column>
+		<column>session_forum_id</column>
+		<column>session_time</column>
+		<column>session_ip</column>
+		<column>session_viewonline</column>
+	</table>
+</dataset>
diff --git a/tests/functions/obtain_online_test.php b/tests/functions/obtain_online_test.php
new file mode 100644
index 0000000000..1089b42616
--- /dev/null
+++ b/tests/functions/obtain_online_test.php
@@ -0,0 +1,69 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+
+class phpbb_functions_obtain_online_test extends phpbb_database_test_case
+{
+	public function getDataSet()
+	{
+		return $this->createXMLDataSet(dirname(__FILE__).'/fixtures/obtain_online.xml');
+	}
+
+	protected function setUp()
+	{
+		global $config, $db;
+
+		$db = $this->db = $this->new_dbal();
+		$config = array(
+			'load_online_time'	=> 5,
+		);
+	}
+
+	static public function obtain_guest_count_data()
+	{
+		return array(
+			array(0, 2),
+			array(1, 1),
+		);
+	}
+
+	/**
+	* @dataProvider obtain_guest_count_data
+	*/
+	public function test_obtain_guest_count($forum_id, $expected)
+	{
+		$this->db->sql_query('DELETE FROM phpbb_sessions');
+
+		$this->create_guest_sessions();
+		$this->assertEquals($expected, obtain_guest_count($forum_id));
+	}
+
+	protected function create_guest_sessions()
+	{
+		$this->add_session(1, '0001', 0, true, 0);
+		$this->add_session(1, '0002', 1, true, 0);
+		$this->add_session(1, '0003', 0, true, 10);
+		$this->add_session(1, '0004', 1, true, 10);
+	}
+
+	protected function add_session($user_id, $user_ip, $forum_id, $view_online, $time_delta)
+	{
+		$sql_ary = array(
+			'session_id'			=> $user_id . '_' . $forum_id . '_session00000000000000000' . $user_ip,
+			'session_user_id'		=> $user_id,
+			'session_ip'			=> $user_ip,
+			'session_forum_id'		=> $forum_id,
+			'session_time'			=> time() - $time_delta * 60,
+			'session_viewonline'	=> $view_online,
+		);
+
+		$this->db->sql_query('INSERT INTO phpbb_sessions ' . $this->db->sql_build_array('INSERT', $sql_ary));
+	}
+}