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Negative testing

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Anisha Nayak
Anisha Nayak

Anisha Nayak presents on negative testing. Negative testing involves testing software with invalid or unexpected inputs to try to cause failures. It aims to show where a system does not work by testing boundaries and error conditions. The goals of negative testing are to find faults, diagnose failures, and identify weaknesses. Techniques include using invalid data types, missing required fields, and unusual format values. Negative testing should continue until all invalid test cases are covered or no significant new issues are found.

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Presented By: Anisha Nayak 27/08/2014
2 A certified professional from ISTQB & V-Skills (Selenium) Networking : https://www.facebook.com/anisha.nayak.9 https://www.linkedin.com/profile/anisha.nayak/view?id=144724673 https://twitter.com/NayakAnisha Contact Me: anishan@mindfiresolutions.com Nayak.anisha@gmail.com Anisha Nayak, Mindfire Solutions
What is Negative Testing ? Positive view of Negative Testing. Goals of Negative Testing. Techniques of Negative Testing. When do you stop Negative Testing ? Queries. Anisha Nayak, Mindfire Solutions 3
4Anisha Nayak, Mindfire Solutions
Tests aimed at showing that a component or system does not work. Negative testing is related to the testers attitude rather than a specific test approach or test design technique, e.g. testing with invalid input values or exceptions. Negative testing is aimed at showing software does not work. Test to fail 5Anisha Nayak, Mindfire Solutions
Testing done while providing negative inputs and checking whether it gives some alert messages or not. It is to check its potential to handle exploitation or external problems. Its like discovery of faults that result in failures or crashes. Negative Testing is done only after validating the positive test cases first. 6Anisha Nayak, Mindfire Solutions
Any testing carried out by passing non recommended values with an aim of breaking down the application, taking a look at real world conditions and anticipating potential errors made by end users which are not necessarily looked up by developers/designers. 7Anisha Nayak, Mindfire Solutions
Few checkpoints which defines the positive aspect of Negative testing are as follows : You do not actually know the way your product is treated in Market, so its always good to anticipate bugs before the end users points it. An eye opener for you, you really tend to find lot of critical issues which might not be caught through normal test approach. 8Anisha Nayak, Mindfire Solutions
While designing test cases we include both valid and invalid test cases. Invalid does not mean that it represents a value that cannot be entered by a user or a value that the user isnt supposed to enter. It just means that it is not one of the expected inputs for this particular field and the software should correctly handle these values. 9Anisha Nayak, Mindfire Solutions
It is important to understand the purpose of negative testing. Valuable information about the softwares functionality, reliability and security breaches are discovered and handled during negative testing. Diagnosis of the possible causes of failures like crashes and corruption of data. Identification of the software weaknesses and potential for exploitation. 10Anisha Nayak, Mindfire Solutions
Verification of functionality issues like error- handling(Out of range data, Dates in incorrect format, dd/mm/yyyy instead of the required mm/dd/yyyy). 11Anisha Nayak, Mindfire Solutions
Few very common ways used while doing a Negative testing, 1. Verify each field type. 2. Skip the required data entry and try to proceed. 3. Enter large values to test the size of the fields. 4. Verify the date format and its validity. This calls for a discussion 12Anisha Nayak, Mindfire Solutions
Negative testing is open ended, so the tester may be tempted to go on even if only minor test failures are encountered. Negative testing could be exploratory in nature. So, when does a tester stop negative testing? 1. When all your invalid inputs as test cases have been covered. 2. When you do not find any significant issues, you can stop conducting negative testing. 13Anisha Nayak, Mindfire Solutions
For projects with stiff deadlines, you may need to present the results for verifications and assessments for the risks. Both the developer and the clients or end users, affirm and agree that that no further tests are necessary depending on the priority and status of the issue whether its critical or major/minor. Negative testing is a powerful and effective approach to discover significant failures, which maybe undetected under normal operations or functions. 14Anisha Nayak, Mindfire Solutions
Negative testing is viewed by some as a duplicate of the various positive tests conducted during and after the development processes. Negative testing is a powerful and effective approach to discover significant failures, which maybe undetected under normal operations or functions. Negative testing is aimed at discovering those hidden errors and needs skilled, experienced testers with an eye for details that can be a red signal for possible concerns. 15Anisha Nayak, Mindfire Solutions
It guarantees quality as well as helps in detecting failure, potential errors and builds a strong base for continual product improvement, thus should be a part of the various testing activities during software development. In short you need to Think Negative while doing NEGATIVE TESTING to do it the best way. 16Anisha Nayak, Mindfire Solutions
Lets help build a better Quality Product which is free from all potential errors ! 17Anisha Nayak, Mindfire Solutions
18Anisha Nayak, Mindfire Solutions
http://www.exforsys.com/tutorials/testing-types/negative- testing.html http://blogs.windriver.com/henderson/2010/04/time-to- get-positive-about-negative-testing.html https://www.linkedin.com/groups/Negative-scenarios-Test- Cases-negative-5181861.S.57918349297047429 19Anisha Nayak, Mindfire Solutions
Thank You 20Anisha Nayak, Mindfire Solutions
Anisha Nayak, Mindfire Solutions 21 www.mindfiresolutions.com https://www.facebook.com/MindfireSolutions http://www.linkedin.com/company/mindfire-solutions http://twitter.com/mindfires

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Negative testing

  • 1. Presented By: Anisha Nayak 27/08/2014
  • 2. 2 A certified professional from ISTQB & V-Skills (Selenium) Networking : https://www.facebook.com/anisha.nayak.9 https://www.linkedin.com/profile/anisha.nayak/view?id=144724673 https://twitter.com/NayakAnisha Contact Me: anishan@mindfiresolutions.com Nayak.anisha@gmail.com Anisha Nayak, Mindfire Solutions
  • 3. What is Negative Testing ? Positive view of Negative Testing. Goals of Negative Testing. Techniques of Negative Testing. When do you stop Negative Testing ? Queries. Anisha Nayak, Mindfire Solutions 3
  • 5. Tests aimed at showing that a component or system does not work. Negative testing is related to the testers attitude rather than a specific test approach or test design technique, e.g. testing with invalid input values or exceptions. Negative testing is aimed at showing software does not work. Test to fail 5Anisha Nayak, Mindfire Solutions
  • 6. Testing done while providing negative inputs and checking whether it gives some alert messages or not. It is to check its potential to handle exploitation or external problems. Its like discovery of faults that result in failures or crashes. Negative Testing is done only after validating the positive test cases first. 6Anisha Nayak, Mindfire Solutions
  • 7. Any testing carried out by passing non recommended values with an aim of breaking down the application, taking a look at real world conditions and anticipating potential errors made by end users which are not necessarily looked up by developers/designers. 7Anisha Nayak, Mindfire Solutions
  • 8. Few checkpoints which defines the positive aspect of Negative testing are as follows : You do not actually know the way your product is treated in Market, so its always good to anticipate bugs before the end users points it. An eye opener for you, you really tend to find lot of critical issues which might not be caught through normal test approach. 8Anisha Nayak, Mindfire Solutions
  • 9. While designing test cases we include both valid and invalid test cases. Invalid does not mean that it represents a value that cannot be entered by a user or a value that the user isnt supposed to enter. It just means that it is not one of the expected inputs for this particular field and the software should correctly handle these values. 9Anisha Nayak, Mindfire Solutions
  • 10. It is important to understand the purpose of negative testing. Valuable information about the softwares functionality, reliability and security breaches are discovered and handled during negative testing. Diagnosis of the possible causes of failures like crashes and corruption of data. Identification of the software weaknesses and potential for exploitation. 10Anisha Nayak, Mindfire Solutions
  • 11. Verification of functionality issues like error- handling(Out of range data, Dates in incorrect format, dd/mm/yyyy instead of the required mm/dd/yyyy). 11Anisha Nayak, Mindfire Solutions
  • 12. Few very common ways used while doing a Negative testing, 1. Verify each field type. 2. Skip the required data entry and try to proceed. 3. Enter large values to test the size of the fields. 4. Verify the date format and its validity. This calls for a discussion 12Anisha Nayak, Mindfire Solutions
  • 13. Negative testing is open ended, so the tester may be tempted to go on even if only minor test failures are encountered. Negative testing could be exploratory in nature. So, when does a tester stop negative testing? 1. When all your invalid inputs as test cases have been covered. 2. When you do not find any significant issues, you can stop conducting negative testing. 13Anisha Nayak, Mindfire Solutions
  • 14. For projects with stiff deadlines, you may need to present the results for verifications and assessments for the risks. Both the developer and the clients or end users, affirm and agree that that no further tests are necessary depending on the priority and status of the issue whether its critical or major/minor. Negative testing is a powerful and effective approach to discover significant failures, which maybe undetected under normal operations or functions. 14Anisha Nayak, Mindfire Solutions
  • 15. Negative testing is viewed by some as a duplicate of the various positive tests conducted during and after the development processes. Negative testing is a powerful and effective approach to discover significant failures, which maybe undetected under normal operations or functions. Negative testing is aimed at discovering those hidden errors and needs skilled, experienced testers with an eye for details that can be a red signal for possible concerns. 15Anisha Nayak, Mindfire Solutions
  • 16. It guarantees quality as well as helps in detecting failure, potential errors and builds a strong base for continual product improvement, thus should be a part of the various testing activities during software development. In short you need to Think Negative while doing NEGATIVE TESTING to do it the best way. 16Anisha Nayak, Mindfire Solutions
  • 17. Lets help build a better Quality Product which is free from all potential errors ! 17Anisha Nayak, Mindfire Solutions
  • 19. http://www.exforsys.com/tutorials/testing-types/negative- testing.html http://blogs.windriver.com/henderson/2010/04/time-to- get-positive-about-negative-testing.html https://www.linkedin.com/groups/Negative-scenarios-Test- Cases-negative-5181861.S.57918349297047429 19Anisha Nayak, Mindfire Solutions
  • 20. Thank You 20Anisha Nayak, Mindfire Solutions
  • 21. Anisha Nayak, Mindfire Solutions 21 www.mindfiresolutions.com https://www.facebook.com/MindfireSolutions http://www.linkedin.com/company/mindfire-solutions http://twitter.com/mindfires