def test_task_track(self):
        request_info = {
            'accept_language': '',
            'referer': '',
            'username': 'anonymous',
            'ip': '127.0.0.1',
            'agent': 'agent',
            'host': 'testserver',
        }

        task_info = {
            sentinel.task_key: sentinel.task_value
        }
        expected_event_data = dict(task_info)
        expected_event_data.update(self.event)

        views.task_track(request_info, task_info, str(sentinel.event_type), self.event)

        expected_event = {
            'username': 'anonymous',
            'ip': '127.0.0.1',
            'event_source': 'task',
            'event_type': str(sentinel.event_type),
            'event': expected_event_data,
            'agent': 'agent',
            'page': None,
            'time': FROZEN_TIME,
            'host': 'testserver',
            'context': {
                'course_id': '',
                'org_id': ''
            },
        }
        self.assert_mock_tracker_call_matches(expected_event)

    def test_task_track(self):
        request_info = {
            'username': 'anonymous',
            'ip': '127.0.0.1',
            'agent': 'agent',
            'host': 'testserver',
        }

        task_info = {
            sentinel.task_key: sentinel.task_value
        }
        expected_event_data = dict(task_info)
        expected_event_data.update(self.event)

        views.task_track(request_info, task_info, str(sentinel.event_type), self.event)

        expected_event = {
            'username': 'anonymous',
            'ip': '127.0.0.1',
            'event_source': 'task',
            'event_type': str(sentinel.event_type),
            'event': expected_event_data,
            'agent': 'agent',
            'page': None,
            'time': expected_time,
            'host': 'testserver',
            'context': {
                'course_id': '',
                'org_id': ''
            },
        }
        self.mock_tracker.send.assert_called_once_with(expected_event)

    def make_track_function():
        '''
        Make a tracking function that logs what happened.

        For insertion into ModuleSystem, and used by CapaModule, which will
        provide the event_type (as string) and event (as dict) as arguments.
        The request_info and task_info (and page) are provided here.
        '''
        return lambda event_type, event: task_track(request_info, task_info, event_type, event, page='x_module_task')

    def test_task_track(self):
        request_info = {"username": "anonymous", "ip": "127.0.0.1", "agent": "agent", "host": "testserver"}

        task_info = {sentinel.task_key: sentinel.task_value}
        expected_event_data = dict(task_info)
        expected_event_data.update(self.event)

        views.task_track(request_info, task_info, str(sentinel.event_type), self.event)

        expected_event = {
            "username": "anonymous",
            "ip": "127.0.0.1",
            "event_source": "task",
            "event_type": str(sentinel.event_type),
            "event": expected_event_data,
            "agent": "agent",
            "page": None,
            "time": expected_time,
            "host": "testserver",
            "context": {"course_id": "", "org_id": ""},
        }
        self.mock_tracker.send.assert_called_once_with(expected_event)

def _get_track_function_for_task(student, xmodule_instance_args=None, source_page='x_module_task'):
    """
    Make a tracking function that logs what happened.

    For insertion into ModuleSystem, and used by CapaModule, which will
    provide the event_type (as string) and event (as dict) as arguments.
    The request_info and task_info (and page) are provided here.
    """
    # get request-related tracking information from args passthrough, and supplement with task-specific
    # information:
    request_info = xmodule_instance_args.get('request_info', {}) if xmodule_instance_args is not None else {}
    task_info = {'student': student.username, 'task_id': _get_task_id_from_xmodule_args(xmodule_instance_args)}

    return lambda event_type, event: task_track(request_info, task_info, event_type, event, page=source_page)