Black Box testing vs White Box testing
What is Black Box testing?
Black Box Testing is a software testing method in which the functionalities of software applications are tested without having knowledge of internal code structure, implementation details, and internal paths. Black Box Testing mainly focuses on the input and output of software applications and it is entirely based on software requirements and specifications. It is also known as Behavioral Testing. Under Black Box Testing, you can test your own custom applications by just focusing on the inputs and outputs without knowing their internal code implementation.
How to do Black Box testing?
- The requirements and specifications of the system are examined.
- The tester chooses valid inputs (positive test scenario) to check whether SUT processes them correctly. Also, some invalid inputs (negative test scenario) are chosen to verify that the SUT is able to detect them.
- Tester determines expected outputs for all those inputs.
- Software tester constructs test cases with the selected inputs.
- The test cases are executed.
- The software tester compares the actual outputs with the expected outputs.
- Defects if any are fixed and re-tested.
What are the types of Black Box testing?
Functional testing
Non-functional testing
Regression testing
What techniques used for Black Box testing?
Equivalence class testing
Boundary value testing
decision table testing
What is White Box testing?
White Box Testing is a software testing technique in which internal structure, design, and coding of software are tested to verify the flow of input-output and to improve design, usability, and security. In white-box testing, code is visible to testers so it is also called Clear box testing, Open box testing, Transparent box testing, Code-based testing, and Glass box testing. The term “WhiteBox” was used because of the see-through box concept.
How to do WhiteBox testing?
Understand the source code: The first thing a tester will often do is learn and understand the source code of the application. Since white box testing involves the testing of the inner workings of an application, the tester must be very knowledgeable in the programming languages used in the applications they are testing. Also, the testing person must be highly aware of secure coding practices
Create test cases and execute: The second basic step to white box testing involves testing the application’s source code for proper flow and structure. One way is by writing more code to test the application’s source code. The tester will develop little tests for each process or series of processes in the application.
What are the types of White Box testing?
Unit Testing
Testing for memory leaks
white Box
White Box Mutation testing
What techniques used for White Box testing?
Statement Coverage
Decision Coverage
Branch Coverage
Condition Coverage
Multiple Condition Coverage
Finite State Machine Coverage
Path Coverage
Control flow testing
Data flow testing
Conclusion
In a conclusion, Black Box Testing is a software testing method in which the internal structure/ design/ implementation of the item being tested is NOT known to the tester. White Box Testing is a software testing method in which the internal structure/ design/ implementation of the item being tested is known to the tester.
