Mock/Stub a function (a npm module) with callback using Sinon

Question

I'm using json2csv npm module to convert the json response to csv format, the code looks like below..

json2csv({ data: data, fields: ['id', 'firstName', 'lastName'] }, function (err, csv) {
          if (err) {
            reject(err);
          } else {
            resolve(csv);
          }
        });

How to stub the above function using sinon so i can write unit tests for success and error scenarios. My unit testing stack is Jasmine and Istanbul.