Structural and functional testing

Structural and functional testing

1. STRUCTURAL AND FUNCTIONAL TESTING Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA)

2. CONTENTS What is testing? Goals of testing Principles of Testing Structural and Functional Testing Types of Structural and Functional Testing Limitations

3. TESTING According to the glossary of the IEEE standardization , testing is defined as : “ The process of analyzing a software item to detect the differences between existing and required conditions (that is, bugs) and to evaluate the features of the software item”

4. GOALS OF TESTING Goal of testing : finding faults in the software producing a zero defect software testing should be traceable it should be deterministic

5. PRINCIPLES OF TESTING Test a program to try to make it fail Start testing early

6. Testing must be done by different persons at different levels Cont…

7. Test a program innovatively Use both static and dynamic testing Cont…

8. STRUCTURAL TESTING Generates test cases based on the structure of the program Also known as white box testing The internal structure of the program is taken into account

9. FUNCTIONAL TESTING Generates test cases based on the functionality of the software Also known as black box testing The internal structure of the program is hidden from the testing process

10. Identify the functions which software is expected to perform Treats the software as a "black box", examining functionality without any knowledge of internal implementation Cont…

11. TYPES OF STRUCTURAL TESTING The different types of structural testing are : Statement coverage : all statements in the programs should be executed at least once Branch coverage : all branches in the program should be executed at least once

12. Path coverage : all execution paths in the program should be executed at lest once Conditional coverage : For conditional branches, this means that, we execute the TRUE branch at least once and the FALSE branch at least once Cont…

13. TYPES OF FUNCTIONAL TESTING The different types of functional testing are: Equivalence class partitioning: In this approach, the domain of input values to a program is partitioned into a set of equivalent classes Boundary value analysis : It is the analysis of the programming error that frequently occurs at the boundaries of different equivalence classes of inputs

14. LIMITATIONS Testing can be used to show the presence of errors, but never to show their absence Software testing does not help in finding root causes It can only identify the known issues or errors. It gives no idea about defects still uncovered .

15. THANK YOU Dr. Himanshu Hora SRMS College of Engineering & Technology Bareilly (INDIA)