Functional testing for beginners


Software testing step to fixing all the bugs of the website but building a strategy which can help to check the accuracy, durability, usability and reliability of the product is a little bit difficult process. In this article, we will help you to understand the concept and various techniques involved in the process of functional testing which will help you as a beginner in the field of software testing to learn how you can perform the various testing methods especially functional testing with effective and efficient manner. But to do this, you must first of all you need to know what are functional testing services.

What is Functional testing process?

Functional testing is a process that verifies that each function or module of the software application is working properly and fulfilling the requirement specification. Functional testing is a quality assurance process that mainly involves black box testing techniques to test the software application. The testing approaches are not concerned with the source code of the application, but it is concerned with the output of the source code, or we can say that the results of the source code. In functional testing, functions are tested by appropriate input data and pre-estimated output data. The actual results are then compared with the pre-estimated results to conclude. The testing can be done both manually and using automation testing tools. It depends upon the test engineer which method they want to use.

Steps to perform functional testing

No doubt, every process steps depend upon the type of application which has to be tested. But there are some set of processes which are common or we can say globally followed to perform certain activities. The following are the various steps you may follow to test application in functional testing.

  • In the very first step, you need to identify the various functions of modulus of the software application, which must have to be tested.
  • After identification, the module sees you need to create the input data based on the various specifications of the identified functions.
  • Now you need to figure out what should be the output of the functions based on the function’s specifications.
  • In this step, you have to execute the various test cases you drafted in previous steps.
  • Now you must compare the expected output with the actual outputs to check what are the various bugs and issues in the function modules.

Advantages of functional testing

the following are the various advantages you need to know before conducting the functional testing

  • Functional testing simulates the actual system to test the application functions
  • Functional testing is not capable of making system structure is emissions
  • It focuses on the end user’s experience with the software application

Disadvantages of functional testing

The following are the various disadvantages an organisation may suffer from while using functional testing

  • It is not capable to figure out what are the various logical errors in the software
  • There is a high possibility of redundant testing cases which made the costume so much

Types of functional testing

functional testing is divided into various types each type has its significance in the software testing life cycle

Unit testing

Unit testing is done on the smallest testable parts of the application independently; it is considered as the initial step of the software testing life cycle.

Integration testing

When all the module is individually tested by unit testing, the next step is to combine doze mode used to check whether they are working fine when combined or not. The process is known as integration testing.

Smoke testing

The process is used to figure out the simple failures which can cause the rejection of a respective software build or release.

Sanity testing

sanity testing is drawn to make sure that all the parts of the system or methodology work as they expected to work.

System testing

The testing process is conducted to integrate the system to figure out the compatibility of the system with the specified requirements.

Regression testing

Regression testing confirms that modification made to the modulus of the application has not any side effect on the functionality of the system.

Acceptance testing

it is the final step, which makes sure that the application is acceptable and fulfilling all the requirements of a requirement specification.

Alpha testing

The testing process is conducted by the quality assurance team and the developers of the application. The test process includes all the above test for the final testing before end-user testing.

Beta testing

The beta testing is done by the audience, or we can say, end users. Audience maybe a technical team or non-technical team of the users. The application is run in real time to check the reliability and efficiency of the software product or application.

When do you need to do functional testing?

All types of testing strategies must include functional testing at its core. A functional test is critical to ensure that the software product is working as per the users as well as clients. The team should start doing basic functional testing in the early phases of development to make sure that all the components for models of the application are working correctly independently as well as combined. But according to some experts, the functional testing should be done according to the need of the application and also type of the application. So it’s dependent upon the test engineers and developers to decide when to conduct the functional testing processes.


So don’t know what an application deserves when it is in the development process; you must conduct the functional testing process. Also, it is very easy to learn how to do functional testing because the whole process is based on the data and the estimated output of the source code. No doubt the test processes are not concerned with the source code of the application, but if there are some complications in the functionality or output of the source code, then it is also easy to figure out which part of the source code is affected or wrong written. We will be very happy if you learn something from this article and make this the part of your testing strategies. If you want to know more about functional testing as a beginner, then you can ask any sort of question in the comment section. We are always here to help our readers.