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Testing is a buzzword in the software industry. According to Frost & Sullivan, the software testing market is expected to grow at 14% CAGR in the next few years with the rise of agile testing and DevOps. The entire software completely depends on this phase of the process. The system needs to be tested on regular intervals to ensure that it executes the process defect free. So, in this Functional testing vs Non-Functional testing article, let’s compare the two major types of software testing based on certain parameters.
Below are the topics that I will be discussing in this Functional testing vs Non-Functional testing article:
Before comparing Functional testing & Non-functional testing, let us know the process of software testing
Technology in recent days has enhanced so much that most of our day to day activities are done using machines and these machines need to be tested on regular intervals so that the cost of this work is reduced. Software Testing is a process of evaluating the functionality of a software application to find if there are any bugs in the software or not. It checks whether the developed software meets the specified requirements and detects any defect in the software in order to produce a quality product. Testing is, evaluating a system in order to identify any gaps, errors, or missing requirements contrary to the actual requirements.
If the software used by any organization works fine without any drawback, it profits the user as well as the organization for providing valuable applications. So, all the applications developed by the organizations should be tested regularly to verify if it is running as per the user requirements.
Software testing is a pool of knowledge and endorsement and it is a widely used process all around the world. You might wonder what are the different types that exist.
Testing is an integral part of any successful software project. The types of software testing depend on various factors which even includes the project requirements, budget, timeline, expertise, and suitability. The different Types of software testing play the key role where the tester determines the right testing for appropriate applications.
Software testing is broadly divided into two major types: Functional testing and Non-functional testing which are further divided into various types. Let’s understand each one of them in detail.
Functional testing is a type of software testing where the system is tested against the functional requirements or specifications like the technical details, data manipulation and processing, and other specific functionalities. You might think, functional testing just refers to testing a function (method) of your module or any class but that’s not what it does. It tests a slice of the functionality of the whole system.
Let’s take a look at different types of functional testing. They are namely:
Now, let’s see each one of them in detail
Unit testing: A unit is the smallest testable part of any software. It usually has one or a few inputs and a single output. It is a level of software testing where individual units/components of the software are tested. The main purpose is to validate each unit of the software, performs as designed.
Integration testing: It is a level of software testing where individual units are combined and tested as a group. The main purpose of this type of testing is to expose faults in the interaction between integrated units.
System testing: It is a level of software testing where the complete and integrated software is tested. The purpose of this test is to evaluate the system’s compliance with the specified requirements. It is a series of different tests whose sole purpose is to exercise the system.
Interface testing: It is a level of software testing which verifies whether the communication between two different software is done correctly.
Regression testing: Regression testing verifies that a code change in the software does not have an impact on the existing functionality of the product.
User-acceptance testing: It is a level of software testing where a system is tested for acceptability. The sole purpose of this test is to evaluate the system’s compliance with its business requirements and assess whether it is acceptable for delivery. It checks whether the software can handle the required tasks in real-world scenarios.
Now, let’s see what is Non-functional testing and see what exactly it does to test a software.
Non-functional testing is another type of software testing which is used to check the non-functional aspects like performance, usability, reliability, etc. of a software application which are not tested using functional testing.
Let us see what are the different types of Non-functional testing. They are namely:
Let’s learn about each one of them in detail
Documentation testing: It helps to estimate the required testing efforts and track the requirements. Software documentation includes a test plan, test cases, and requirements section. It tests the documented artifacts.
Installation testing: It is a type of quality assurance work in the software industry that converges on what customers will need to do to install and set up the new software successfully. It checks if the software application is successfully installed and is working as expected. The testing process may involve full, partial or upgrades install/uninstall processes.
Performance testing: It is defined as a type of software testing that is used to ensure that the software applications will perform well under their expected workload. Performance testing is considered as a heart of Non-functional testing. It is further divided into a few types.
Check out this video on performance testing where our software testing expert is explaining how performance testing is important.
So, this is about performance testing. Now, let’s take a look at the other types of non-functional testing.
Reliability testing: It assures that the product is fault free and is reliable for its intended purpose. It is about exercising an application so that the failures are discovered before the system is deployed.
Security testing: It is a variant of software testing which ensures that the system and applications of the organization are free from loopholes. Security testing is about finding all possible weaknesses of the system which might result in a loss of information.
This is all about the different types of Non-functional testing. Now let us move forward and compare functional & non-functional testing on various parameters.
Let’s take a clear look at these parameters and understand how these types of software testing differ based on them
So, these are the parameters on which Functional testing and Non-functional testing differ from each other.
|Parameters||Functional testing||Non-Functional testing|
|Objective||To verify and validate the software actions that define the process||To verify and validate the performance of the system|
|Key focus area||Concentrates on the user requirements||Concentrates on the user expectations|
|Ease of use||Easy to execute black-box test cases||Easy to execute white-box test cases|
|Functionality||Describes what the system should do||Describes how the system should work|
|Execution||It is executed before Non-functional testing||It is executed after Functional testing is executed|
Now with this, we come to an end to this “Functional testing vs Non-Functional testing” blog. I Hope you guys enjoyed this article and understood what is software testing and the Types of Software testing and their major differences. Now that you have understood the comparison between the types of testing, check out the Software Testing Functional Course by Edureka, a trusted online learning company with a network of more than 650,000 satisfied learners spread across the globe. This course is designed to introduce you to the complete software testing life-cycle. You will be learning different levels of testing, test environment setup, test case design technique, test data creation, test execution, bug reporting, and other essential concepts of software testing. Got a question for us? Please mention it in the comments section of “Functional testing vs Non-Functional testing” and we will get back to you.