resolve: removed capacity related codes, & updated test cases

Author: fahimfaisaal

Data-Structures/Queue/Queue.js

@@ -9,14 +9,9 @@
 class Queue {
   #size
 
-  constructor (capacity) {
-    if (capacity < 1) {
-      throw new Error('Capacity is not valid')
-    }
-
+  constructor () {
     this.head = null
     this.tail = null
-    this.capacity = capacity
     this.#size = 0
 
     return Object.seal(this)
@@ -32,10 +27,6 @@ class Queue {
    * @returns {number} - The current size of queue
    */
   enqueue (data) {
-    if (this.capacity === this.#size) {
-      throw new RangeError('Queue is full')
-    }
-
     const node = { data, next: null }
 
     if (!this.head && !this.tail) {

Data-Structures/Queue/test/Queue.test.js

@@ -1,60 +1,35 @@
 import Queue from '../Queue'
 
 describe('Testing the Queue DS', () => {
-  it('Check Capacity', () => {
-    const queue = new Queue(3)
-    queue.enqueue(1)
-    queue.enqueue(2)
-    queue.enqueue(8)
+  const queue = new Queue()
 
-    expect(() => queue.enqueue(9)).toThrow()
+  it('Testing enqueue method', () => {
+    expect(queue.enqueue(1)).toBe(1)
+    expect(queue.enqueue(2)).toBe(2)
+    expect(queue.enqueue(8)).toBe(3)
+    expect(queue.enqueue(9)).toBe(4)
   })
 
-  it('Check enqueue/dequeue', () => {
-    const queue = new Queue(10)
-    queue.enqueue(1)
-    queue.enqueue(2)
-    queue.enqueue(8)
-    queue.enqueue(9)
-
-    expect(queue.dequeue()).toBe(1)
-    expect(queue.dequeue()).toBe(2)
+  it('Testing length method', () => {
+    expect(queue.length).toBe(4)
   })
 
-  it('Check length', () => {
-    const queue = new Queue(5)
-
-    queue.enqueue(1)
-    queue.enqueue(2)
-    queue.enqueue(8)
-    queue.enqueue(9)
-
-    expect(queue.toArray()).toEqual([1, 2, 8, 9])
-  })
-
-  it('Check peekFirst & peekLast', () => {
-    const queue = new Queue(4)
-
-    queue.enqueue(1)
-    queue.enqueue(2)
-    queue.enqueue(8)
-    queue.enqueue(9)
-
+  it('Testing peekFirst & peekLast methods', () => {
     expect(queue.peekFirst()).toBe(1)
     expect(queue.peekLast()).toBe(9)
   })
 
-  it('Check toArray', () => {
-    const queue = new Queue()
+  it('Testing toArray method', () => {
+    expect(queue.toArray()).toEqual([1, 2, 8, 9])
+  })
 
-    queue.enqueue(1)
-    queue.enqueue(2)
-    queue.enqueue(8)
-    queue.enqueue(9)
+  it('Testing dequeue method', () => {
+    expect(queue.dequeue()).toBe(1)
+    expect(queue.dequeue()).toBe(2)
   })
 
-  it('Check empty', () => {
-    const queue = new Queue(5)
+  it('Testing isEmpty method', () => {
+    const queue = new Queue()
     expect(queue.isEmpty()).toBeTruthy()
 
     queue.enqueue(1)