gistfile1.txt

 return function(event, handelr){
        var Future = _fantasy.Future;
      
        //checkIfProcessed:: JSON -> Future<string|JSON>
        var checkIfProcessed = i => Future((rej,ret) => i.isIdempotent ? ret(i) : rej('item has already been processed'));

        //checkIdempotence  JSON -> Future<string|JSON>
        var checkIdempotency = R.curry((x,y) => R.compose(R.map(checkIfProcessed), readstorerepository.checkIdempotency(y)));

        return {
            checkIfProcessed,
            checkIdempotency
        }
    }

this one works
    describe('#CHECKIFPROCESSED', function() {
        context('when calling with isIdepotence equal to true', function () {
            it('should return the data',  function () {
                mut.checkIfProcessed({isIdempotent:true}).fork(null,x=> x.must.eql({isIdempotent:true}));
            })
        });
    });

obviously the below is in a state of confusion

 describe('#CHECKIFPROCESSED', function() {
        context('when calling with isIdepotence equal to true', function () {
            it('should return the data',  function () {
                mut.checkIfProcessed({isIdempotent:true}).fork(null, ).must.eql(Future({isIdempotent:true}));
            })
        });
    });