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Commit04b306e

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Queue ⚡
1 parenteaba737 commit04b306e

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2 files changed

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2 files changed

+112
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‎examples/datastructures/queue.js

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classQueue{
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constructor(){
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this.dataStore=[];
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}
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enqueue(element){
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this.dataStore.push(element);
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}
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dequeue(){
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returnthis.dataStore.shift();
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}
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clear(){
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this.dataStore=[];
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}
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front(){
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returnthis.dataStore[0];
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}
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back(){
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returnthis.dataStore[this.dataStore.length-1];
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}
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toString(){
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conststr="";
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for(leti=0;i<this.dataStore.length;i++)
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str+=this.dataStore[i]+" ";
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returnstr;
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}
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empty(){
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returnthis.dataStore.length==0;
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}
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peek(){
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returnthis.dataStore[0];
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}
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length(){
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returnthis.dataStore.length;
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}
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}
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module.exports=Queue;

‎test/datastructures/queue.test.js

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constexpect=require('chai').expect;
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constQueue=require('../../examples/datastructures/queue');
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describe('=> QUEUE',function(){
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letnumbers;
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before(function(){
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numbers=newQueue();
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});
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it('should create an Empty Queue',function(done){
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expect(numbers.dataStore).to.deep.equal([]);
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done();
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});
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it('should enqueue elements into the Queue',function(done){
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numbers.enqueue(1);
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numbers.enqueue(2);
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numbers.enqueue(3);
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numbers.enqueue(4);
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expect(numbers.dataStore).to.deep.equal([1,2,3,4]);
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done();
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});
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it('should peek the Queue',function(done){
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expect(numbers.peek()).to.deep.equal(1);
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done();
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});
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it('should check if the Queue is empty',function(done){
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expect(numbers.empty()).to.equal(false);
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done();
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});
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it('should check the length of the Queue',function(done){
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expect(numbers.length()).to.equal(4);
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done();
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});
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describe('=> dequeue',function(){
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it('should dequeue 1 element of the Queue',function(done){
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numbers.dequeue();
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expect(numbers.dataStore).to.deep.equal([2,3,4]);
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done();
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});
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it('should dequeue all elements of the Queue',function(done){
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numbers.dequeue();
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numbers.dequeue();
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numbers.dequeue();
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expect(numbers.dataStore).to.deep.equal([]);
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done();
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});
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});
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describe('=> clear',function(){
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it('should clear the Queue',function(done){
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numbers.clear();
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expect(numbers.dataStore).to.deep.equal([]);
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done();
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});
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});
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});

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