Sample

This is the expected output when app.js is run on terminal

Tests for Requirements

This project has the following requirments:

• Telephone Class with 3 Public Methods
  
  In phone.js file, the Telephone class is in line 2 while AddPhoneNumber, RemovePhoneNumber, and DialPhoneNumber methods can be found in lines 9, 18 and 26 respectively.

• Update Telephone Class to Use Observer Pattern
  
  This was applied in lines 40 and and 49 of the phone.js file.

• A Class for Observer Pattern
  
  Line 49 in phone.js file, shows a class for Observer pattern.

• Telephone Class Notify Observer Anytime Phone Number is Dailed
  
  This can also be found in line 40 of the phone.js file.

• Add Two Observer to the Telephone Class
  
  In app.js lines 7 and 8, we have two observers to the telephone class.

Note

• Phone Number must be added(to the observersArray) before it can be dailed.

• In phone.js file, line 22 will throw an error because the phone number has not being added before it was dailed.

Usage

• clone this project with this command below or any preferred method, cd into the telephone-package folder

git clone https://github.com/lotacodic/telephone-package.git

• node js is needed to run this project on terminal
• recommended IDE is Vs Code, I recommend Maximum Panel Size for a better view of the output
• run this command node app.js on terminal