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|
var async = require('../lib');
var expect = require('chai').expect;
var _ = require('lodash');
describe('auto', function () {
it('basics', function(done){
var callOrder = [];
async.auto({
task1: ['task2', function(results, callback){
setTimeout(function(){
callOrder.push('task1');
callback();
}, 25);
}],
task2: function(callback){
setTimeout(function(){
callOrder.push('task2');
callback();
}, 50);
},
task3: ['task2', function(results, callback){
callOrder.push('task3');
callback();
}],
task4: ['task1', 'task2', function(results, callback){
callOrder.push('task4');
callback();
}],
task5: ['task2', function(results, callback){
setTimeout(function(){
callOrder.push('task5');
callback();
}, 0);
}],
task6: ['task2', function(results, callback){
callOrder.push('task6');
callback();
}]
},
function(err){
expect(err).to.equal(null);
expect(callOrder).to.eql(['task2','task6','task3','task5','task1','task4']);
done();
});
});
it('auto concurrency', function (done) {
var concurrency = 2;
var runningTasks = [];
function makeCallback(taskName) {
return function(/*..., callback*/) {
var callback = _.last(arguments);
runningTasks.push(taskName);
setTimeout(function(){
// Each task returns the array of running tasks as results.
var result = runningTasks.slice(0);
runningTasks.splice(runningTasks.indexOf(taskName), 1);
callback(null, result);
});
};
}
async.auto({
task1: ['task2', makeCallback('task1')],
task2: makeCallback('task2'),
task3: ['task2', makeCallback('task3')],
task4: ['task1', 'task2', makeCallback('task4')],
task5: ['task2', makeCallback('task5')],
task6: ['task2', makeCallback('task6')]
}, concurrency, function(err, results){
_.each(results, function(result) {
expect(result.length).to.be.below(concurrency + 1);
});
done();
});
});
it('auto petrify', function (done) {
var callOrder = [];
async.auto({
task1: ['task2', function (results, callback) {
setTimeout(function () {
callOrder.push('task1');
callback();
}, 100);
}],
task2: function (callback) {
setTimeout(function () {
callOrder.push('task2');
callback();
}, 200);
},
task3: ['task2', function (results, callback) {
callOrder.push('task3');
callback();
}],
task4: ['task1', 'task2', function (results, callback) {
callOrder.push('task4');
callback();
}]
},
function (err) {
if (err) throw err;
expect(callOrder).to.eql(['task2', 'task3', 'task1', 'task4']);
done();
});
});
it('auto results', function(done){
var callOrder = [];
async.auto({
task1: ['task2', function(results, callback){
expect(results.task2).to.eql('task2');
setTimeout(function(){
callOrder.push('task1');
callback(null, 'task1a', 'task1b');
}, 25);
}],
task2: function(callback){
setTimeout(function(){
callOrder.push('task2');
callback(null, 'task2');
}, 50);
},
task3: ['task2', function(results, callback){
expect(results.task2).to.eql('task2');
callOrder.push('task3');
callback(null);
}],
task4: ['task1', 'task2', function(results, callback){
expect(results.task1).to.eql(['task1a','task1b']);
expect(results.task2).to.eql('task2');
callOrder.push('task4');
callback(null, 'task4');
}]
},
function(err, results){
expect(callOrder).to.eql(['task2','task3','task1','task4']);
expect(results).to.eql({task1: ['task1a','task1b'], task2: 'task2', task3: undefined, task4: 'task4'});
done();
});
});
it('auto empty object', function(done){
async.auto({}, function(err){
expect(err).to.equal(null);
done();
});
});
it('auto error', function(done){
async.auto({
task1: function(callback){
callback('testerror');
},
task2: ['task1', function(results, callback){
throw new Error('task2 should not be called');
}],
task3: function(callback){
callback('testerror2');
}
},
function(err){
expect(err).to.equal('testerror');
});
setTimeout(done, 100);
});
it('auto no callback', function(done){
async.auto({
task1: function(callback){callback();},
task2: ['task1', function(results, callback){callback(); done();}]
});
});
it('auto concurrency no callback', function(done){
async.auto({
task1: function(callback){callback();},
task2: ['task1', function(results, callback){callback(); done();}]
}, 1);
});
it('auto error should pass partial results', function(done) {
async.auto({
task1: function(callback){
callback(false, 'result1');
},
task2: ['task1', function(results, callback){
callback('testerror', 'result2');
}],
task3: ['task2', function(){
throw new Error('task3 should not be called');
}]
},
function(err, results){
expect(err).to.equal('testerror');
expect(results.task1).to.equal('result1');
expect(results.task2).to.equal('result2');
done();
});
});
// Issue 24 on github: https://github.com/caolan/async/issues#issue/24
// Issue 76 on github: https://github.com/caolan/async/issues#issue/76
it('auto removeListener has side effect on loop iterator', function(done) {
async.auto({
task1: ['task3', function(/*callback*/) { done(); }],
task2: ['task3', function(/*callback*/) { /* by design: DON'T call callback */ }],
task3: function(callback) { callback(); }
});
});
// Issue 410 on github: https://github.com/caolan/async/issues/410
it('auto calls callback multiple times', function(done) {
if (process.browser) {
// node only test
return done();
}
var finalCallCount = 0;
var domain = require('domain').create();
domain.on('error', function (e) {
// ignore test error
if (!e._test_error) {
return done(e);
}
});
domain.run(function () {
async.auto({
task1: function(callback) { callback(null); },
task2: ['task1', function(results, callback) { callback(null); }]
},
// Error throwing final callback. This should only run once
function() {
finalCallCount++;
var e = new Error('An error');
e._test_error = true;
throw e;
});
});
setTimeout(function () {
expect(finalCallCount).to.equal(1);
done();
}, 10);
});
it('auto calls callback multiple times with parallel functions', function(done) {
async.auto({
task1: function(callback) { setTimeout(callback,0,'err'); },
task2: function(callback) { setTimeout(callback,0,'err'); }
},
// Error throwing final callback. This should only run once
function(err) {
expect(err).to.equal('err');
done();
});
});
// Issue 462 on github: https://github.com/caolan/async/issues/462
it('auto modifying results causes final callback to run early', function(done) {
async.auto({
task1: function(callback){
callback(null, 'task1');
},
task2: ['task1', function(results, callback){
results.inserted = true;
setTimeout(function(){
callback(null, 'task2');
}, 50);
}],
task3: function(callback){
setTimeout(function(){
callback(null, 'task3');
}, 100);
}
},
function(err, results){
expect(results.inserted).to.equal(true);
expect(results.task3).to.equal('task3');
done();
});
});
// Issue 263 on github: https://github.com/caolan/async/issues/263
it('auto prevent dead-locks due to inexistant dependencies', function(done) {
expect(function () {
async.auto({
task1: ['noexist', function(results, callback){
callback(null, 'task1');
}]
});
}).to.throw;
done();
});
// Issue 263 on github: https://github.com/caolan/async/issues/263
it('auto prevent dead-locks due to cyclic dependencies', function(done) {
expect(function () {
async.auto({
task1: ['task2', function(results, callback){
callback(null, 'task1');
}],
task2: ['task1', function(results, callback){
callback(null, 'task2');
}]
});
}).to.throw;
done();
});
// Issue 988 on github: https://github.com/caolan/async/issues/988
it('auto stops running tasks on error', function(done) {
async.auto({
task1: function (callback) {
callback('error');
},
task2: function (callback) {
throw new Error('test2 should not be called');
}
}, 1, function (error) {
expect(error).to.equal('error');
done();
});
});
it('ignores results after an error', function (done) {
async.auto({
task1: function (cb) {
setTimeout(cb, 25, 'error');
},
task2: function (cb) {
setTimeout(cb, 30, null);
},
task3: ['task2', function () {
throw new Error("task should not have been called");
}]
}, function (err) {
expect(err).to.equal('error');
setTimeout(done, 25, null);
});
});
it("does not allow calling callbacks twice", function () {
expect(function () {
async.auto({
bad: function (cb) {
cb();
cb();
}
}, function () {});
}).to.throw();
});
});
|
