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node_modules/seq-queue/test/seq-queue-test.js
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307
node_modules/seq-queue/test/seq-queue-test.js
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var should = require('should');
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var SeqQueue = require('../lib/seq-queue');
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var timeout = 1000;
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describe('seq-queue', function() {
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describe('#createQueue', function() {
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it('should return a seq-queue instance with init properties', function() {
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var queue = SeqQueue.createQueue(timeout);
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should.exist(queue);
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queue.should.have.property('timeout', timeout);
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queue.should.have.property('status', SeqQueue.IDLE);
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});
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});
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describe('#push' , function() {
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it('should change the queue status from idle to busy and invoke the task at once when task finish when queue idle', function(done) {
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var queue = SeqQueue.createQueue(timeout);
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queue.should.have.property('status', SeqQueue.IDLE);
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queue.push(function(task) {
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should.exist(task);
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task.done();
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queue.should.have.property('status', SeqQueue.IDLE);
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done();
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});
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queue.should.have.property('status', SeqQueue.BUSY);
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});
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it('should keep the status busy and keep the new task wait until the former tasks finish when queue busy', function(done) {
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var queue = SeqQueue.createQueue(timeout);
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var formerTaskFinished = false;
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//add first task
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queue.push(function(task) {
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formerTaskFinished = true;
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task.done();
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});
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queue.should.have.property('status', SeqQueue.BUSY);
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//add second task
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queue.push(function(task) {
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formerTaskFinished.should.be.true;
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queue.should.have.property('status', SeqQueue.BUSY);
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task.done();
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queue.should.have.property('status', SeqQueue.IDLE);
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done();
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});
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queue.should.have.property('status', SeqQueue.BUSY);
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});
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it('should ok if the task call done() directly', function(done) {
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var queue = SeqQueue.createQueue();
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var taskCount = 0;
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queue.push(function(task) {
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taskCount++;
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task.done();
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});
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queue.push(function(task) {
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taskCount++;
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task.done();
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});
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setTimeout(function() {
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taskCount.should.equal(2);
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done();
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}, 500);
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});
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});
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describe('#close', function() {
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it('should not accept new request but should execute the rest task in queue when close gracefully', function(done) {
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var queue = SeqQueue.createQueue(timeout);
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var closedEventCount = 0;
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var drainedEventCount = 0;
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queue.on('closed', function() {
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closedEventCount++;
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});
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queue.on('drained', function() {
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drainedEventCount++;
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});
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var executedTaskCount = 0;
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queue.push(function(task) {
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executedTaskCount++;
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task.done();
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}).should.be.true;
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queue.close(false);
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queue.should.have.property('status', SeqQueue.CLOSED);
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queue.push(function(task) {
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// never should be executed
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executedTaskCount++;
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task.done();
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}).should.be.false;
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// wait all task finished
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setTimeout(function() {
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executedTaskCount.should.equal(1);
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closedEventCount.should.equal(1);
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drainedEventCount.should.equal(1);
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done();
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}, 1000);
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});
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it('should not execute any task and emit a drained event when close forcefully', function(done) {
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var queue = SeqQueue.createQueue(timeout);
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var drainedEventCount = 0;
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queue.on('drained', function() {
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drainedEventCount++;
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});
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var executedTaskCount = 0;
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queue.push(function(task) {
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//never should be executed
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executedTaskCount++;
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task.done();
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}).should.be.true;
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queue.close(true);
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queue.should.have.property('status', SeqQueue.DRAINED);
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// wait all task finished
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setTimeout(function() {
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executedTaskCount.should.equal(0);
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drainedEventCount.should.equal(1);
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done();
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}, 1000);
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});
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});
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describe('#timeout', function() {
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it('should emit timeout event and execute the next task when a task timeout by default', function(done) {
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var queue = SeqQueue.createQueue();
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var executedTaskCount = 0;
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var timeoutCount = 0;
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var onTimeoutCount = 0;
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//add timeout listener
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queue.on('timeout', function(task) {
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task.should.be.a('object');
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task.fn.should.be.a('function');
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timeoutCount++;
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});
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queue.push(function(task) {
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executedTaskCount++;
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//no task.done() invoke to cause a timeout
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}, function() {
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onTimeoutCount++;
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}).should.be.true;
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queue.push(function(task) {
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executedTaskCount++;
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task.done();
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}).should.be.true;
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setTimeout(function() {
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//wait all task finish
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executedTaskCount.should.be.equal(2);
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timeoutCount.should.be.equal(1);
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onTimeoutCount.should.be.equal(1);
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done();
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}, 4000); //default timeout is 3s
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});
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it('should return false when invoke task.done() if task has already timeout', function(done) {
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var queue = SeqQueue.createQueue();
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var executedTaskCount = 0;
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var timeoutCount = 0;
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var timeout = 1000;
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//add timeout listener
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queue.on('timeout', function(task) {
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task.should.be.a('object');
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task.fn.should.be.a('function');
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timeoutCount++;
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});
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queue.push(function(task) {
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executedTaskCount++;
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task.done().should.be.true;
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}).should.be.true;
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queue.push(function(task) {
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//sleep to make a timeout
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setTimeout(function() {
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executedTaskCount++;
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task.done().should.be.false;
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}, timeout + 1000);
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}, null, timeout).should.be.true;
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setTimeout(function() {
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//wait all task finish
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executedTaskCount.should.be.equal(2);
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timeoutCount.should.be.equal(1);
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done();
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}, 4000);
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});
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it('should never timeout after close forcefully', function(done) {
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var queue = SeqQueue.createQueue(timeout);
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var timeoutCount = 0;
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//add timeout listener
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queue.on('timeout', function(task) {
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//should never enter here
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timeoutCount++;
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});
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queue.push(function(task) {
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//no task.done() invoke to cause a timeout
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}).should.be.true;
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queue.close(true);
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setTimeout(function() {
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//wait all task finish
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timeoutCount.should.be.equal(0);
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done();
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}, timeout * 2);
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});
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it('should use the global timeout value by default', function(done) {
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var globalTimeout = timeout + 100;
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var queue = SeqQueue.createQueue(globalTimeout);
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//add timeout listener
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queue.on('timeout', function(task) {
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(Date.now() - start).should.not.be.below(globalTimeout);
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done();
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});
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queue.push(function(task) {
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//no task.done() invoke to cause a timeout
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}).should.be.true;
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var start = Date.now();
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});
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it('should use the timeout value in #push if it was assigned', function(done) {
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var localTimeout = timeout / 2;
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var queue = SeqQueue.createQueue(timeout);
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//add timeout listener
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queue.on('timeout', function(task) {
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var diff = Date.now() - start;
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diff.should.not.be.below(localTimeout);
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diff.should.not.be.above(timeout);
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done();
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});
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queue.push(function(task) {
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//no task.done() invoke to cause a timeout
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}, null, localTimeout).should.be.true;
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var start = Date.now();
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});
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});
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describe('#error', function() {
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it('should emit an error event and invoke next task when a task throws an event', function(done) {
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var queue = SeqQueue.createQueue();
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var errorCount = 0;
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var taskCount = 0;
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//add timeout listener
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queue.on('error', function(err, task) {
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errorCount++;
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should.exist(err);
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should.exist(task);
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});
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queue.push(function(task) {
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taskCount++;
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throw new Error('some error');
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}).should.be.true;
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queue.push(function(task) {
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taskCount++;
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task.done();
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});
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setTimeout(function() {
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taskCount.should.equal(2);
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errorCount.should.equal(1);
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done();
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}, 500);
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});
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it('should be ok when task throw a error after done was invoked', function(done) {
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var queue = SeqQueue.createQueue();
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var errorCount = 0;
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var taskCount = 0;
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//add timeout listener
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queue.on('error', function(err, task) {
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errorCount++;
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should.exist(err);
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should.exist(task);
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});
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queue.push(function(task) {
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taskCount++;
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task.done();
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throw new Error('some error');
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}).should.be.true;
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queue.push(function(task) {
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taskCount++;
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task.done();
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});
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setTimeout(function() {
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taskCount.should.equal(2);
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errorCount.should.equal(1);
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done();
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}, 500);
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});
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});
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});
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