46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @format
|
|
* @emails oncall+javascript_foundation
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
const sinon = require('sinon');
|
|
const promiseWaterfall = require('../promiseWaterfall');
|
|
|
|
describe('promiseWaterfall', () => {
|
|
it('should run promises in a sequence', done => {
|
|
const tasks = [sinon.stub(), sinon.stub()];
|
|
|
|
promiseWaterfall(tasks).then(() => {
|
|
expect(tasks[0].calledBefore(tasks[1])).toBeTruthy();
|
|
done();
|
|
});
|
|
});
|
|
|
|
it('should resolve with last promise value', done => {
|
|
const tasks = [sinon.stub().returns(1), sinon.stub().returns(2)];
|
|
|
|
promiseWaterfall(tasks).then(value => {
|
|
expect(value).toEqual(2);
|
|
done();
|
|
});
|
|
});
|
|
|
|
it('should stop the sequence when one of promises is rejected', done => {
|
|
const error = new Error();
|
|
const tasks = [sinon.stub().throws(error), sinon.stub().returns(2)];
|
|
|
|
promiseWaterfall(tasks).catch(err => {
|
|
expect(err).toEqual(error);
|
|
expect(tasks[1].callCount).toEqual(0);
|
|
done();
|
|
});
|
|
});
|
|
});
|