const assert = require('assert') const nodeify = require('../../../app/scripts/lib/nodeify') describe('nodeify', function () { var obj = { foo: 'bar', promiseFunc: function (a) { var solution = this.foo + a return Promise.resolve(solution) }, } it('should retain original context', function (done) { var nodified = nodeify(obj.promiseFunc, obj) nodified('baz', function (err, res) { assert.equal(res, 'barbaz') done() }) }) it('should allow the last argument to not be a function', function (done) { const nodified = nodeify(obj.promiseFunc, obj) try { nodified('baz') done() } catch (err) { done(new Error('should not have thrown if the last argument is not a function')) } }) })