What are the different types of Functional Testing?

As we discussed in the last tutorial about Functional testing, Functional testing is when the software is checked to make sure it works well and meets certain rules. Testing functionality makes sure that the software meets all requirements or specifications. This type of testing is focused on what happens when something is processed. It does not make any system structure assumptions but focuses on the simulation of how the system is actually used.

Let’s come to the main topic, “What are the different types of Functional Testing?”

There are many types of functional testing. Here are a few of them:

1. Unit Testing: Unit testing is a type of functional testing technique that tests the individual units or modules of the application. It makes sure that each module is working properly.
2. Integration Testing: In the context of integration testing, the combined individual units are evaluated collectively, thereby revealing any deficiencies in the interaction between the integrated units.
3. Smoke Testing:  Smoke testing is a type of functional testing technique that examines the fundamental functionality or characteristic of the application, assuring that the most crucial function is as intended.
4. User Acceptance Testing: A user acceptance test is conducted by the client to ensure that the system meets the requirements and works as intended. This is the final phase of testing prior to the product’s release.
5. Interface Testing: Interface testing is a way of testing software that checks how well two different programs work together.
6. Usability Testing: The process of usability testing is conducted to assess the ease and user-friendliness of a software application.
7. System Testing: This is a type of testing that checks how well a computer system works together to make sure it meets the rules.
8. Regression Testing: Regression testing is performed to ensure that code changes do not affect the existing functionality or features of the application. The primary focus is on determining whether all components are functioning properly or not.
9. Sanity Testing: Sanity testing is a type of regression testing that checks if the changes to the code are working as expected.
10. White box Testing: White box testing is a type of software testing that lets the tester check the software system’s internal workings. This includes looking at the code, the infrastructure, and how it connects to the external system.
11. Black box Testing: Black box testing is a form of software testing that involves testing the functionality of a software system without examining its internal workings or structures.
12. Database Testing:   Database testing is a type of software testing that checks the schema, tables, and other parts of the database being tested.
13. Adhoc Testing: Adhoc testing is a type of testing that doesn’t follow a plan or documentation. It’s also called monkey testing or random testing.
14. Recovery Testing: A type of software testing called recovery testing verifies the pieces of software’s ability to recover from failures like hardware failures, software failures, crashes, and so on.
15. Static Testing:  The purpose of static testing is to check for defects in software without actually executing the code of the software application.
16. Greybox Testing:  Grey box testing is a form of software testing that encompasses both black box and white box testing.
17. Component Testing:  Component testing is a type of software testing that happens after unit testing. It’s also called program testing or module testing. This allows the test objects to be tested on their own without being plugged into any other components.

Functional Testing vs Non-Functional Testing

Below are the differences between functional testing and non-functional testing: