What is Functional Testing in Software Testing?
- Functional testing is a process of checking the correctness and completeness of the functionality of the build.
- Functional system testing is the process of checking internal functionality depending on external functionality.
- This type deals with the functional requirements or specifications of an application to be tested by providing the input and comparing it with the expected output.
Types of Functional Testing
A few major types of Functional Testing in software testing are:
- Smoke Testing
- Sanity Testing
- Integration Testing
- System Testing
- Regression Testing
- User Acceptance Testing
What We Are Testing In Functional Testing?
We check functionality and the coverage are:
- Behavioral Coverage
- I/P Domain Coverage
- Error Handling Coverage
- Back End coverage
- Service Level Coverage
- Calculation base coverage
1. Behavioral Coverage
In this, we check the property and behavior of the object.
Property of check box – Do tick when the user clicks
The behavior of check box – Check/Uncheck
Property of Drop-down – to show hidden list on click
The behavior of drop-down – Show/hide list
2. I/P Domain Coverage
Here we check the input data with different conditions and can use Boundary value analysis and Equivalence class partitioning techniques.
3. Error handling coverage
Error handling coverage includes checking whether the system shows an error message or not as per the requirement.
If in customer requirement, the mobile number should accept the 10 digits, and the developer build according to if the customer enters 2 digits and click on the OK button then the system should highlight a text box with red color with the error message “Please enter 10-digit mobile number”
So, this is the process of validation.
4. Back-end coverage
The back end of any software system is the database.
In back end coverage developer checks whether the entered information from the user gets stored in the database or not
We also check whether data get fetched from the database or not.
5. Service Level Coverage
In SRS, BA creates a functional flow diagram and accordingly tester test the sequence of functions and modules.
This aspect of sequentially functional modules gets tested in service-level coverage.
6. Calculation base Coverage
Here arithmetic operations can be tested
Arithmetic operation means addition, multiplication, sub and division, etc
Example-If we add 1 thing in the cart and it is 900 rs then the total is 900 and again we add 2 things which are 50 rs then the total is 1000.
Then remove 1 thing of 50 rs than 950 in total. This gets checked in this coverage.