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Presented by
 Saptarshi Dutta Chowdhury

MCA, Heritage Institute of Technology
INTRODUCTION
  It is the process used to identify the correctness,
completeness and quality of developed computer
software.

  It is the process of executing a program/application
under positive and negative conditions by manual or
automated means. It checks for the :-
 Specification
 Functionality
 Performance
OBJECTIVES
  Uncover as many as errors (or bugs) as possible in a given
product.

  Demonstrate a given software product matching its requirement
specifications.


  Validate the quality of a software testing using the minimum cost
and efforts.


  Generate high quality test cases, perform effective tests, and issue
correct and helpful problem reports.
Error, Bug, Fault & Failure
Error : It is a human action that produces the incorrect
result that produces a fault.
Bug : The presence of error at the time of execution of the
software.
Fault : State of software caused by an error.
Failure : Deviation of the software from its expected result. It is
an event.
SDLC(Software Development Life Cycle)

 Standard model used word wide to develop a software.

 A framework that describes the activities performed at
each stage of a software development project.

 Necessary to ensure the quality of the software.

 Logical steps taken to develop a software product.
Classical Waterfall Model
    Feasibility Study



       Requirements Analysis & Specification




                                Design



                                         Coding & Unit Testing



                                                        Integration & System Testing




                                                                              Maintenance




It is the oldest and most widely used model in
the field of software development.
Testing Life Cycle
    Project Initiation
                                   Summary Reports
 System Study
                                             Analysis
Test Plan
                                          Regression Test

  Design Test Cases
                                   Report Defects

                 Execute Test Cases
               ( manual /automated )
Test Plan
It is a systematic approach to test a system i.e.
software. The plan typically contains a detailed
understanding of what the eventual testing
workflow will be.
Test Case
 It is a specific procedure of testing a particular
 requirement.

It will include:
   Identification of specific requirement tested
   Test case success/failure criteria
   Specific steps to execute test
   Test data
Verification vs Validation
•   Verification: The software should confirm to its
    specification (Are we building the product right?)


•   Validation: The software should do what the user really
    requires (Are we building the right product?)
Testing Methodologies

Black box testing

White box testing
Black box testing
 No knowledge of internal program design or code
  required.
 Tests are based on requirements and functionality.


White box testing
 Knowledge of the internal program design and
  code required.
 Tests are based on coverage of code
  statements, branches, paths, conditions.
Black box testing

        requirements

                                output


input

                       events
White box testing

          Test data



Tests      Derives


          Component          Test
            code            outputs
Testing Levels
• Unit testing

• Integration testing

• System testing
UNIT TESTING

Tests each module individually.
Follows a white box testing (Logic of the program).
Done by developers.
INTEGRATION TESTING
  Once all the modules have been unit tested, integration
testing is performed.
  It is systematic testing.
  Produce tests to identify errors associated with interfacing.
         Types:
                  Big Bang Integration testing
                  Top Down Integration testing
                  Bottom Up Integration testing
                  Mixed Integration testing
SYSTEM TESTING
 The system as a whole is tested to uncover
requirement errors.

 Verifies that all system elements work properly
and that overall system function and performance
has been achieved.

Types:
  Alpha Testing
  Beta Testing
  Acceptance Testing
  Performance Testing
Alpha Testing
It is carried out by the test team within the developing
organization .

                   Beta Testing
It is performed by a selected group of friendly customers.

                   Acceptance Testing
It is performed by the customer to determine whether to
accept or reject the delivery of the system.

                    Performance Testing
It is carried out to check whether the system meets the
nonfunctional requirements identified in the SRS
document.
Types of Performance Testing:
 Stress Testing
 Volume Testing
 Configuration Testing
 Compatibility Testing
 Regression Testing
 Recovery Testing
 Maintenance Testing
 Documentation Testing
 Usability Testing
DISCUSSION
  In order to be cost effective, the testing must be
 concentrated on areas where it will be most effective.

 The testing should be planned such that when testing is
stopped for whatever reason, the most effective testing in
the time allotted has already been done.

 The absence of an organizational testing policy may
result in too much effort and money will be spent on
testing, attempting to achieve a level of quality that is
impossible or unnecessary.
THANK YOU

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Software testing ppt

  • 1. Presented by Saptarshi Dutta Chowdhury MCA, Heritage Institute of Technology
  • 2. INTRODUCTION It is the process used to identify the correctness, completeness and quality of developed computer software. It is the process of executing a program/application under positive and negative conditions by manual or automated means. It checks for the :-  Specification  Functionality  Performance
  • 3. OBJECTIVES Uncover as many as errors (or bugs) as possible in a given product. Demonstrate a given software product matching its requirement specifications. Validate the quality of a software testing using the minimum cost and efforts. Generate high quality test cases, perform effective tests, and issue correct and helpful problem reports.
  • 4. Error, Bug, Fault & Failure Error : It is a human action that produces the incorrect result that produces a fault. Bug : The presence of error at the time of execution of the software. Fault : State of software caused by an error. Failure : Deviation of the software from its expected result. It is an event.
  • 5. SDLC(Software Development Life Cycle)  Standard model used word wide to develop a software.  A framework that describes the activities performed at each stage of a software development project.  Necessary to ensure the quality of the software.  Logical steps taken to develop a software product.
  • 6. Classical Waterfall Model Feasibility Study Requirements Analysis & Specification Design Coding & Unit Testing Integration & System Testing Maintenance It is the oldest and most widely used model in the field of software development.
  • 7. Testing Life Cycle Project Initiation Summary Reports System Study Analysis Test Plan Regression Test Design Test Cases Report Defects Execute Test Cases ( manual /automated )
  • 8. Test Plan It is a systematic approach to test a system i.e. software. The plan typically contains a detailed understanding of what the eventual testing workflow will be.
  • 9. Test Case It is a specific procedure of testing a particular requirement. It will include: Identification of specific requirement tested Test case success/failure criteria Specific steps to execute test Test data
  • 10. Verification vs Validation • Verification: The software should confirm to its specification (Are we building the product right?) • Validation: The software should do what the user really requires (Are we building the right product?)
  • 11. Testing Methodologies Black box testing White box testing
  • 12. Black box testing  No knowledge of internal program design or code required.  Tests are based on requirements and functionality. White box testing  Knowledge of the internal program design and code required.  Tests are based on coverage of code statements, branches, paths, conditions.
  • 13. Black box testing requirements output input events
  • 14. White box testing Test data Tests Derives Component Test code outputs
  • 15. Testing Levels • Unit testing • Integration testing • System testing
  • 16. UNIT TESTING Tests each module individually. Follows a white box testing (Logic of the program). Done by developers.
  • 17. INTEGRATION TESTING Once all the modules have been unit tested, integration testing is performed. It is systematic testing. Produce tests to identify errors associated with interfacing. Types: Big Bang Integration testing Top Down Integration testing Bottom Up Integration testing Mixed Integration testing
  • 18. SYSTEM TESTING  The system as a whole is tested to uncover requirement errors.  Verifies that all system elements work properly and that overall system function and performance has been achieved. Types: Alpha Testing Beta Testing Acceptance Testing Performance Testing
  • 19. Alpha Testing It is carried out by the test team within the developing organization . Beta Testing It is performed by a selected group of friendly customers. Acceptance Testing It is performed by the customer to determine whether to accept or reject the delivery of the system. Performance Testing It is carried out to check whether the system meets the nonfunctional requirements identified in the SRS document.
  • 20. Types of Performance Testing: Stress Testing Volume Testing Configuration Testing Compatibility Testing Regression Testing Recovery Testing Maintenance Testing Documentation Testing Usability Testing
  • 21. DISCUSSION  In order to be cost effective, the testing must be concentrated on areas where it will be most effective.  The testing should be planned such that when testing is stopped for whatever reason, the most effective testing in the time allotted has already been done.  The absence of an organizational testing policy may result in too much effort and money will be spent on testing, attempting to achieve a level of quality that is impossible or unnecessary.