Software testing

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Team Members

- Ahmed Moawad

- Ebtsam Abdul-Aziz Hassan.

- Shimaa Mohsen El-Sadik.

- Nora Abdul-Rahman

- Nermin Abdul-Menaem Hassan

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Introduction

- is the process of evaluating a system or its component(s) with theintent to find that whether it satisfies the specified requirements ornot.

- is executing a system in order to identify any gaps, errors or missing requirements in contrary to the actual desire or requirements.

Testing

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Who test?

Software Tester

Software Developer

Project Manager

End User

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Testing Types

Manual Testing

Automation Testing

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- This type includes the testing of theSoftware manually i.e. without using anyautomated tool or any script.

Manual Testing

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- Automation testing is when the tester writes scripts and uses another software to test the software.

Automation Testing

- Examples:- Visual Studio.- IBM Test.

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Methods of Testing

Black Box Grey BoxWhite Box

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Black Box Testing

- Testing without having any knowledge of the interior workings of the application.

- Called blind testing or closed box system .

- The tester does not have access to the source code.

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Advantages Disadvantages

- efficient for large code segments.

- Code Access not required.

- Large numbers of normalskilled testers can test the application.

- Inefficient testing.

Black Box Testing (cont..)

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White Box Testing

-Detailed investigation of internal logic and structure of the code.

- Called glass testing or open box testing

-The tester needs to possess knowledge of the internal working of the code.

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White Box Testing (cont..)

Advantages Disadvantages

- It helps in optimizing the code.

- Maximum coverage is attained during test scenario writing.

- The costs are increased.

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Grey Box Testing

- Limited knowledge of the internal workings of an application.

- Called limited knowledge testing.

- The tester has access to design documents and the database

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Grey Box Testing (cont..)

Advantages Disadvantages

- Grey box testers don't rely on the source code.

- a grey box tester can design excellent test scenarios.

- The test is done from the point of view of the user and not the designer

- Test coverage is limited.

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Level of Testing

Functional Testing

Non-Functional Testing

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Functional Testing

Unit Testing

Integration Testing

Regression Testing

System Testing

Acceptance Testing

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Unit Testing

- Unit testing is performed by the respective developers on the individual units of source code assigned areas.

Unit

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Integration Method is testing combined parts of an application to determine if they function correctly together.

- There are two methods :

Integration Testing

Unit Unit Unit

- Bottom-up Integration testing.

- Top Down Integration testing.

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System Testing

- System Testing tests the system as a whole.

- Once all the components are integrated, the application as a whole is tested rigorously to see that it meets Quality Standards.

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Regression Testing

- The intent of Regression testing is to ensure that a change, such as a bug fix did not result in another fault being uncovered in the application.

Tester Developer Tester

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Acceptance Testing

- By performing Acceptance test on an application the testing team will deduce how the application will perform in production.

- Consists of:- Alpha Testing.- Beta Testing.

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Acceptance Testing (cont..)

ALPHA TESTING- Unit testing, integration testing and system testing when combined are known as alpha testing.

BETA TESTING- In beta testing a sample of the intended audience tests the application

Edtable Editable

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Non-Functional Testing

Performance

Portability

Security

Usability

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Performance Testing

- It is mostly used to identify any bottlenecks or performance issues rather than finding the bugs in software

- Performance testing is considered as one of the important and mandatory testing types in terms of following aspects:

- Speed - Capacity- Stability- Scalability

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Performance Testing (cont..)

Load testing

- Determine Maximum load:- Users

- Data

- Specify Normal and peak load conditions.

Stress testing

- Testing of Software behavior under abnormal conditions.

- Examples:- Database On-Off.

- Server Down.

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- Usability testing is for user-friendliness.

- Will depend on the targeted end-user or customer.

- Make User interviews, surveys, video recording of user sessions.

Usability Testing

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- Security Testing is the testing of Software in order to identify

any gaps from security.

Security Testing

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Portability Testing is the testing of Software with intend that it should be re-useable and can be moved from another Software as well.

Portability Testing

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Testing Documentation

Test Plan

Test Scenario

Test Case

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Test Plan

Test plan outlines:-The strategy that will be used to test an application-The resources that will be used-The test environment in which testing will be performed-The schedule of testing activities.

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Test Case

The main intent of this activity is to ensure whether the Software Passes or Fails in terms of its functionality and other aspects.

Case Actual Expected

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Test Scenario

- Test Scenarios are used to ensure that all process flows are tested from end to end.

Test Case 1

Test Case 2

Test Case 3

Scenario 1

Test Case 1

Test Case 2

Test Case 3

Scenario 2

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When to Start Testing?

- An early start to testing reduces the cost, time to rework.

- Water fall model formal testing is conducted in the Testing phase.

- Incremental model, testing is performed at the end of everyincrement and at the end the whole application is tested.

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When to Stop Testing?

- Testing Deadlines.

- Completion of test case execution.

- Management decision.

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Conclusion

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References

- http://www.tutorialspoint.com/software_testing/index.htm., 03 Dec 2014.- http://en.wikipedia.org/wiki/Acceptance_testing, 03 Dec 2014.- http://en.wikipedia.org/wiki/Software_testing, 03 Dec 2014.- https://www.udacity.com/course/cs258, 03 Dec 2014.- I.Sommerville, Intro to Software Engineering, 9th Edition,2011.

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