Complete Guide To Object Oriented Concepts in Selenium Automation Framework

In almost all of the Automation interview you may have face this question where you have actually used OOPS Concept in your Automation framework.

So In this blog, we will discuss how and where we have actually applied below OOPs concepts in our Automation Framework.

•         INTERFACE
•         ABSTRACTION
•         INHERITANCE
•        ENCAPSULATION
•         METHOD OVERLOADING
•         METHOD OVERRIDING

INTERFACE

An interface in the Java programming language is an abstract type that is used to specify a behavior that classes must implement. An interface also contain methods and variables just like the class but the methods declared in interface are by default abstract.

To understand this the very basic statement we write in Selenium

WebDriver driver = new Chromedriver();

In this Case WebDriver itself is an Interface. So based on this statement, WebDriver driver = new Chromedriver(); we are initializing chrome browser using Selenium WebDriver. It means we are creating a reference variable (driver) of the interface (WebDriver) and creating an Object. Here WebDriver is an Interface as mentioned earlier and Chromedriver is a class.

ABSTRACTION

As we are aware, Abstraction is a process of hiding the implementation details from the user and showing only relevant details to them. It also helps to reduce programming complexity and effort.

In our Automation Framework whenever we Use Page object Model, we write all the locator in page class and use this locator in our test it means we are hiding our implementation from the user this is the simple example of using abstraction in framework.

INHERITANCE

The process by which one class acquires the properties (instance variables) and functionalities of another class is called inheritance.

When We create a Base Class in our automation Framework to initialize WebDriver interface, waits,loggers,reports etc. and when we extend this Base Class in other classes such as Tests and Utility Class. In this case extending one class into other class is example of implementing Inheritance.

ENCAPSULATION

Encapsulation is a mechanism of wrapping data (variables) and code together as a single unit.

All the classes which we write in our automation framework are an example of Encapsulation. 

For e.g In Page object model classes, in which we declare the WebElement locator using @FindBy and initialization of this data members will be done using Constructor to utilize those in test methods.

METHOD OVERLOADING

If a class has multiple methods having same name but different in parameters, it is known as Method Overloading.

In Implicit wait when we use different time stamps such as SECONDS, MINUTES, HOURS etc is one of the possible example of method overloading.

METHOD OVERRIDING

If subclass or child class has the same method as declared in the parent class, it is known as method overriding in Java. 

Whenever we use a method which was already implemented/written in another class by changing its parameters this is the example of method overriding.

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