One of the powerful functions of coderunner is use programming languages to analyze user's data, so it can test kinds of external tasks.
I'm teaching students to operate Micorsoft Excel in Windows. The students can use "external grader" writed by VBA to record their's operating and submit the recording to moodle.
The problem is that someone save the recordings and use them when they do the same test late. They alse pass the recording to others so that they can use them for the same test.
I think one solution is that extertnal grader and coderunner can use the same context informations to test and verify. What I know is that extertnal grader can get user's info from moodle's web service to verity with coderunner's STUDENT' info of template parameters. but it is not enough.
Another way may be that external grader can communicate with coderunner directtly. But I don't know how to To achieve this approach.
Does anyone have a good idea?