Javascript - Login with randomic user

Question

I'm working on an automated test project with cucumber and protractor, and I want to login on my site with random users using Javascript. I can open my webpage and insert value on login form getting the element (related fields) and sending the values to the form with sendKeys() method:

 browser.get('url of the website');
 let username_field = element(by.css('.myUserNameField'));
 let username_password = element(by.css('.myPasswordField'));
 username_field.sendKeys('UsernameRandomicThatIhaveToInsert');
 username_password.sendKeys('PasswordForTheRelatedUser');

My users are written in a seperate file like this:

Al,40402342
John,23492893
Jack,39820812

How can I insert randomly the username and the "related" password?

Thank you in advance

Answer 1

1. Read the file using fs.readFileSync()
2. Split the read string at newlines using String.split
3. Insert a random user/password pair using Math.floor and Math.random

Read the file:

const fs = require('fs');   
const path = require('path'); 
const userFile = fs.readFileSync(path.resolve('file.txt'), {encoding: 'utf8'});

Create an array from your input file

const users = userFile.split('\n');

Generate a random number and retrieve the user/password combination

const randomUser = () => {
    const number = Math.floor(Math.random() * Math.floor(users.length));
    const user = users[number].split(',');

    return {username: user[0], password: user[1]}
}

Call the function in your test:

const user = randomUser();  
username_field.sendKeys(user.username);
username_password.sendKeys(user.password);