diff --git a/tests/main/chat/chat_functions.lib.test.php b/tests/main/chat/chat_functions.lib.test.php
new file mode 100644
index 0000000000..60cfe7c3f4
--- /dev/null
+++ b/tests/main/chat/chat_functions.lib.test.php
@@ -0,0 +1,38 @@
+<?php
+require_once(api_get_path(SYS_CODE_PATH).'chat/chat_functions.lib.php');
+require_once(api_get_path(LIBRARY_PATH).'course.lib.php'); 
+
+Mock::generate('CourseManager');
+class TestChatFunctions extends UnitTestCase {
+	
+	function testdisconnect_user_of_chat() {
+		$res = disconnect_user_of_chat();
+ 		$this->assertTrue(is_null($res));
+ 		//var_dump($res);
+	}
+	
+	function testexit_of_chat () {
+		$docu = new MockCourseManager();
+		$user_id=1;
+		$res = exit_of_chat();
+		$docu->expectOnce(CourseManager::get_courses_list_by_user_id($user_id),'admin');
+ 		$this->assertTrue(is_object($docu));
+ 		$this->assertTrue(is_null($res));
+ 		//var_dump($res);
+	}
+	
+	function testuser_connected_in_chat () {
+		$user_id=1;
+		$database_name='';
+		$res = user_connected_in_chat($user_id,$database_name);
+ 		$this->assertTrue(is_bool($res));
+ 		//var_dump($res);
+	}
+	
+	function testusers_list_in_chat () {
+		$res = users_list_in_chat();
+ 		$this->assertTrue(is_array($res));
+ 		//var_dump($res);
+	}
+}
+?>