Intern Assignment for Quality Control Mechanisms

This project is an assignment for interns to learn the best practices of writing codes by building a simple Calculator in TypeScript

Pre-Requisites

1. Node
2. Npm
3. CLI Tool

Installation

Make sure you have node/npm installed and it's path is added Use the commands below to set up the project

Commands

Migrate to the root directory using command line.

1. Install the packages and dependencies using npm

npm install

2. Build the typescript files (Compile typescript to js)

npm run build

3. Now, generate documentations to know about the functionalities

npm run doc

4. You can use the following command to generate unit testing and coverage reports

npm run test

Project Hierarchy

coverage

This directory is auto-generated when "npm run test" is executed. It contains all the coverage reports 
of unit test cases. 

dist

This directory is auto-generated when "npm run build" is executed. It contains all the js compiled files from typescript

documentation

This directory is auto-genearted when "npm run doc" is executed. It contains the documentations of the usage of calulator functions

node_modules

This directory is auto-generated when "npm install" is executed. It contains the packages and dependencies over which the project is built

src

Here all the source codes are kept which are written in typescipt. Any modifications in code is done here.
Note: Remember to compile everytime any changes are done within this directory

test

This directory contains all the test suites written in js using jest packages. The unit tests are done on the basis of these files only

Documentations

Once you follow the above steps, a new folder named "documentation" will be generated in root folder. Go to documentation->index.html to know about the basic uses of calculator

Usage

This project has 4 functions of a basic calculator:

1. add(a:number, b:number):number

This functions takes two parameters and returns their sum
```js
    let sum = add(43, 23)
    console.log(sum) //prints 66
```

2. subtract(a:number, b:number):number

This function takes two parameters and returns their subtraction result
```js
    let diff = subtract(11, 2)
    console.log(diff) //prints 9
```

3. multiply(a:number, b:number):number

This function takes two parameters and returns product
```js
    let product = multiply(23, 4)
    console.log(product) //prints 92
```

4. divide(a:number, b:number):number

This function take two parameters and returns the quotient when a is divided by b
Note: if b = 0 : Throws "Cannot divide by zero exeception"
```js
    let quo = divide(10/2);
    console.log(quo) //prints 5
    let errQuo = divide(2/0) // throws "Cannot divide by zero" exception
```

Author

Shivam Singh