Executing software in a simulated or real environment, using inputs selected somehow.

1. Created By: Aarif Habeeb
MCA,SEO & SEM Expert, Website Developer
aarifhabeeb@hotmail.com
http://www.appsys.in
created By: Aarif Habeeb

2. Introduction
Goals of Testing
Objectives of testing
Levels of Testing
Test Types
VERIFICATION & VALIDATION
The testing process
Testing phases
Software Testing Difficulties
Stages of Testing
Conclusion
Reference
Question
Contact us
created By: Aarif Habeeb

3. What is Software Testing?
Executing software in a simulated or real
environment, using inputs selected
somehow.
created By: Aarif Habeeb

4. Detect faults
Establish confidence in software
Evaluate properties of software
◦ Reliability
◦ Performance
◦ Memory Usage
◦ Security
◦ Usability
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5. To understand testing techniques that are geared to
discover program faults
To introduce guidelines for interface testing
To understand specific approaches to object-oriented
testing
To understand the principles of CASE tool support for
testing
Executing a program with the intent of finding an
error.
To check if the system meets the requirements and
be executed successfully in the Intended
environment.
To check if the system is “ Fit for purpose”.
To check if the system does what it is expected to do.
created By: Aarif Habeeb

6. A good test case is one that has a probability
of finding an as yet undiscovered error.
A successful test is one that uncovers a yet
undiscovered error.
A good test is not redundant.
A good test should be “best of breed”.
A good test should neither be too simple nor
too complex.
created By: Aarif Habeeb

7. Unit Testing
Integration Testing
Validation Testing
◦ Regression Testing
◦ Alpha Testing
◦ Beta Testing
Acceptance Testing
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8. Functional tests
Algorithmic tests
Positive tests
Negative tests
Usability tests
Boundary tests
Startup/shutdown tests
Platform tests
Load/stress tests
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9. Verification - typically involves reviews and meeting
to evaluate documents, plans, code, requirements,
and specifications. This can be done with checklists,
issues lists, walkthroughs, and inspection meeting.
Validation - typically involves actual testing and takes
place after verifications are completed.
Validation and Verification process continue in
a cycle till the software becomes defects free.
created By: Aarif Habeeb

10. Component testing
◦ Testing of individual program components
◦ Usually the responsibility of the component
developer (except sometimes for critical systems)
◦ Tests are derived from the developer’s experience
Integration testing
◦ Testing of groups of components integrated to
create a system or sub-system
◦ The responsibility of an independent testing team
◦ Tests are based on a system specification
created By: Aarif Habeeb

11. created By: Aarif Habeeb
Component
testing
Integration
testing
Software developer Independent testing team

12. Testing in the Small
Unit Testing
Feature Testing
Integration Testing
Unit Testing
Tests the smallest individually executable code units.
Usually done by programmers. Test cases might be
selected based on code, specification, intuition, etc.
Tools:
Test driver/harness
Code coverage analyzer
Automatic test case generator
created By: Aarif Habeeb

13. Integration Testing
Tests interactions between two or more units
or
components. Usually done by programmers.
Emphasizes interfaces.
Issues:
In what order are units combined?
How do you assure the compatibility and
correctness of externally-supplied
components?
created By: Aarif Habeeb

14. Most of the software testing literature equates test
case selection to software testing but that is just
one
difficult part. Other difficult issues include:
Determining whether or not outputs are correct.
Comparing resulting internal states to expected
states.
Determining whether adequate testing has been
done.
Determining what you can say about the software
when testing is completed.
Measuring performance characteristics.
Comparing testing strategies.
created By: Aarif Habeeb

15. Testing in the Large
System Testing
End-to-End Testing
Operations Readiness Testing
Beta Testing
Load Testing
Stress Testing
Performance Testing
Reliability Testing
Regression Testing
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16. created By: Aarif Habeeb

17. www.appsys.in
www.google.com
www.wiki.com
www.softwaretesting.com
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18. created By: Aarif Habeeb

19. Appsys Informatics Pvt Ltd
info@appsys.in
aarif@appsys.in
+91-9829160120
0141-4020120
www.appsys.in
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20. created By: Aarif Habeeb