CosmoCode (Formerly TeachMeSelenium)
DevOps tutorials | Test Automation tutorials
Shadab Ansari If you work with Ansible, you probably know that we generally provide hosts and groups in a hosts file or inventory. However, at times we might not know all hosts on which we want to run a play. We may decided it at the run time which either comes as an output of another script …
We all come across scenarios where we need to interact with an element that is not in the visible area of the browser. That element may be in the. bottom of the page or top of the page if the page is already scrolled down. In general, WebDriver scrolls the element into view when we …
Read moreHow to scroll element to mid/center, top or bottom of the screen in Selenium?
Sometimes we need to resize the browser window in our Selenium tests. There could be various scenarios why we would want to do that. While debugging a failure on remote execution vs local execution there could be a case that the tests are running with a specific browser size when executed via CI/CD mechanism on …
Read moreHow to resize the browser window, zoom in or zoom out the page content in Selenium?
In one of my recent automation projects, I was writing code to click on a certain element on the webpage. It was a very simple element with an id avatar. To my surprise, Selenium failed to find that element and threw an exception NoSuchElementException . I inspected that element more carefully and found out that …
If you use Selenium and Firefox version 52 or higher for running the automated tests and your development site does not use SSL, you will get the following warning when entering passwords on your login page This connection is not secure. Logins entered here could be compromised Firefox will also open the URL https://support.mozilla.org/en-US/kb/insecure-password-warning-firefox?as=u&utm_source=inproduct in a new …
Read moreHow to disable insecure password warning in Firefox for Selenium?
In the Previous Tutorial, we explored Getters and Setters in JavaScript. In this tutorial, we’ll learn about Prototypes in JavaScript. Inheritance is one of the most important aspects of Object-oriented programming. Unfortunately, JavaScript does not implement inheritance the same way as other modern programming languages like Java, C#, Python, etc do. In JavaScript, inheritance is …
Read morePrototypes in JavaScript | JavaScript & Object Oriented Programming | Part 11
In this tutorial, we’ll explore the three different ways to declare a variable in JavaScript – var, let and const keywords. The keyword var is available since the beginning of JavaScript. Keywords let and const were added in ES6. We’ll also understand why var is problematic and we should use let or const instead. var …
In the Previous Tutorial, we learned the following – Adding Object properties to an existing Object When to use bracket notation to access object property? Adding methods to an existing Object Removing Object properties from an Object Getting the list of object properties Filtering the properties using typeof operator In this tutorial, we’ll learn about a popular …
Read moreGetters and Setters in JavaScript | JavaScript & Object Oriented Programming | Part 10
In the Previous Tutorial we learned How to implement Abstraction in JavaScript. It was great to know that we can hide complexity from the end user and show them only essential details while declaring a Constructor Function. In this tutorial we’ll have a closer look into object properties and learn the following – Adding Object …
In the Previous Tutorial, we learned the following – Every object has a constructor property that returns the function used to create that object. JavaScript has a built-in Constructor Function Object() that creates the object literal. In JavaScript, functions are also object. Like objects, functions also have a constructor property. JavaScript has another built-in Constructor Function Function() that creates …
In the Previous Tutorial, we learned how to create objects by using Constructor Functions. We also saw the magic of the new keyword. So far we have learned all three ways to create objects in JavaScript – Object Literals, Factory Functions and Constructor Functions. In this tutorial we’ll learn about some built-in Constructor Functions provided …
In the Previous Tutorial we learned how to create objects by using Factory Functions. In this tutorial we’ll learn the third and the final way to create objects – Constructor Function What is a Constructor Function? A Constructor Function on its own is not different from regular JavaScript functions. The real fun starts when it …
Read moreConstructor Functions | JavaScript & Object Oriented Programming | Part 6
In the Previous Tutorial we learned the following – Using Object Literal as the object property Using an existing object as an object property In ES6, omitting colon and value from the property if the value variable is having the same name as the property Why you should create methods to update properties? In this …
Read moreFactory Functions | JavaScript & Object Oriented Programming | Part 5
In the Previous Tutorial, we learned the following – What is an Object? Different ways to create objects What is an Object Literal? How to create object by using Object Literal? How to access object properties? How to declare and call methods? In this tutorial, we will deep dive into the world of objects and …
Read moreDeep dive into Object Literals | JavaScript & Object Oriented Programming | Part 4
In the Previous Tutorial, we setup our development environment with the following setup – Google Chrome & its Developer Tool Visual Studio Code (VS Code) Live Server (VS Code extension) Writing some boilerplate HTML and JavaScript Code Running the app and verifying Hello World In this tutorial we’ll learn the following – What is an …
Read moreObject Literals | JavaScript & Object Oriented Programming | Part 3
In the Previous Tutorial, we learned the following – Is JavaScript an Object Oriented programming language? What is Object Oriented Programming (OOP)? What are OOP principles? Why should you care about JavaScript and OOP? Prerequisites for this tutorial In this tutorial we’ll continue that learning and setup our system so that we can learn by …
Read moreSetting up environment | JavaScript & Object Oriented Programming | Part 2
Yes, you can structure your JavaScript code as per Object Oriented Programming (OOPs) principles.
In the Previous Tutorial, we learned to locate elements and perform the action on them. In this tutorial, we will learn some advanced ways to locate elements. Getting the list of elements with the matching locator Sometimes we may need to find all elements on the page that matches a particular locator. For instance, get …
Read moreInteracting with the Elements in the page | Getting the list of elements and Child Element
Sometimes we come across scenarios where we want Selenium to connect to and use an existing browser that was previously opened manually or by some other program. Why do we want Selenium to connect to a previously opened browser? Maybe you want to perform some tasks that require manual intervention before kicking in automation execution. …
Read moreHow to connect Selenium to an existing browser that was opened manually?
Every programmer has to deal with exceptions or errors. Often beginner programmers get dishearten if their code start throwing Exceptions and they have no clue how to deal with it. In this tutorial, we’ll dig deeper to Exceptions world and will try to make friends with them. If you want to be an efficient programmer you …