import assert from 'assert' import nodeify from '../../../app/scripts/lib/nodeify' describe('nodeify', function () { const obj = { foo: 'bar', promiseFunc: function (a) { const solution = this.foo + a return Promise.resolve(solution) }, } it('should retain original context', function (done) { const nodified = nodeify(obj.promiseFunc, obj) nodified('baz', (err, res) => { if (!err) { assert.equal(res, 'barbaz') done() } else { done(new Error(err.toString())) } }) }) it('no callback - 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')) } }) it('sync functions - returns value', function (done) { const nodified = nodeify(() => 42) try { nodified((err, result) => { if (err) { done(new Error(`should not have thrown any error: ${err.message}`)) return } assert.equal(42, result, 'got expected result') }) done() } catch (err) { done(new Error(`should not have thrown any error: ${err.message}`)) } }) it('sync functions - handles errors', function (done) { const nodified = nodeify(() => { throw new Error('boom!') }) try { nodified((err, result) => { if (result) { done(new Error('should not have returned any result')) return } assert.ok(err, 'got expected error') assert.ok(err.message.includes('boom!'), 'got expected error message') }) done() } catch (err) { done(new Error(`should not have thrown any error: ${err.message}`)) } }) })