$courses = core_course_external::get_courses(array('ids' =>

            array($course1->id, $course2->id)));

        // Check we retrieve the good total number of categories.

        $this->assertEquals(2, count($courses));

        // Check the return values for course 1

        $dbcourse = $DB->get_record('course', array('id' => $course1->id));

        $this->assertEquals($courses[0]['id'], $dbcourse->id);