Function exec

test/integration.js:103–110

(cmd, done, cb)

    });

    var exec = function (cmd, done, cb) {
      vorpal.exec(cmd).then(function (data) {
        cb(undefined, data);
      }).catch(function (err) {
        console.log(err);
        done(err);
      });
    };

    describe('promise execution', function () {
      it('should not fail', function (done) {