public function test_component_get_recent_timemodified()
 {
     $now = time();
     $component = new mlang_component('test', 'xx', mlang_version::by_branch('MOODLE_20_STABLE'));
     $this->assertEqual(0, $component->get_recent_timemodified());
     $component->add_string(new mlang_string('first', 'Hello', $now - 5));
     $component->add_string(new mlang_string('second', 'Moodle', $now - 12));
     $component->add_string(new mlang_string('third', 'World', $now - 4));
     $this->assertEqual($now - 4, $component->get_recent_timemodified());
 }