38 lines
997 B
JavaScript
38 lines
997 B
JavaScript
|
const chai = require('chai');
|
||
|
|
const expect = chai.expect;
|
||
|
|
const sinon = require('sinon');
|
||
|
|
const promiseWaterfall = require('../src/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])).to.be.true;
|
||
|
|
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).to.equal(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).to.equal(error);
|
||
|
|
expect(tasks[1].callCount).to.equal(0);
|
||
|
|
done();
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
});
|