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Mutation testing

Printed From: One Stop Testing
Category: Software Testing @ OneStopTesting
Forum Name: Test Plans @ OneStopTesting
Forum Discription: Discuss, Learn and Prepare better and better Test Plans for yourself.
URL: http://forum.onestoptesting.com/forum_posts.asp?TID=532
Printed Date: 18Jul2025 at 2:59am


Topic: Mutation testing
Posted By: varsha
Subject: Mutation testing
Date Posted: 03Apr2007 at 12:01am
Mutation testing

Mutation testing is verifying the testing procedure itself. It may also be used to predict how many issues are yet to be found within the system. To conduct Mutation testing one needs to purposely seed some issues into the product (beware to remember each one). The amount of found seeded defects indicates the level of testing coverage.

Verifying testing thoroughness

Suppose you have seeded 10 issues into different parts of system and then provided it to the next testing stage. After completing testing stage you have found 100 issues, 8 of which are from the seeded sample. This means that defect removal efficiency of this stage is about 80%.

DRE = DTF / DTS = 8 / 10 = 0.8

DRE - Defects removal efficiency
DS - Defects seeded
DSF - Seeded defects found

Determining the total amount of defect (including not found)

With example above, knowing that you have found 8 of 10 seeded issues enables you to suppose that the total amount is proportional to the amount of found issue at about the same ratio. Building a simple proportion will give you a formula for determining the total amount of defects:

DT = DTF * DS / DSF = 100 * 10 / 8 = 125

DT - Total defects (predicted)

This means you've got about 25 issues remaining not found.

Determining areas of weak coverage

Another possible application of this method is indicating the areas when you would probably require more testing. Just look where, what part of product, the not-found-seeded-issues are and add tests to those areas.
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Replies:
Posted By: naruboinac
Date Posted: 11May2007 at 6:40pm
What is an Automation Framework
2.      While automating an application what are the reusable components u would consider
3.      what is an object,method and class and property.Give sp examples
4.      what are addins
5.      why are addins used
6.      what is a patch
7.      why would u go for automation
8.      write a script for comparing the name in report against the name u inputed
9.      tell me a scenario for which u have prepared an autromation script
10.     what estimations u would consider while automating an application
11.     Also tell how did u approach in preparing script for scenario in q 9
12.     what is obkject repository
13.     extension for object repository
14.     extenmsion for qtp script
15.     how do u handle exceptions programmatically and thru qtp
16.     what is difference between Test Object and RuntimeObject  and GETTO property and GETRO property
17.     how do u set a value for an object
18.     what is synchronization and wait
19.     how do u report result
20.     what metrics u would consider so as  to decide which are the manual test cases u can automate
21.     what are the different types of licences
22.     what is the lastest version u are usin
23.     how do u report results in QTP
24.     what is Object identification
25.     Define mandatory,assisitiv e,base filter properties
26.     what is smart identiifartion
27.     what is Test Guard Technology
28.     what is an identifier
29.     what are actions,reuable and external actions
30.     what are types of object repository
31.     how would u use VB functions in QTP
32.     what are rgular expressions
33.     what is reporter .report
34.     what re different checkpoints
35.     can u wriote customized checkpoinst if so how
36      What is an Object spy
37.     Did u use any test management tool to integerate QTPi with?
38.     Can QTP support linux
39.     What are broswers,applicatio n and OS QTP supports
40.     What are minimum  environment considerations fer QTP

 


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