Probabilistic networks basis criteria of quality assurance

Anton Bykau

Regression testing

Before automation

Test developer should well-define:• Test coverage criteria• The strategy of testing• Test architecture of tests

The problems of automation

• UI testing is too slow• There should be done GUI preparation

steps• Support GUI preparation steps• Templates for GUI elements become

not actual• Developer should synchronize

application and test

Tests architecture

Example

~ 2 000 tests> 2 years~ 10 servers

GUI states model use

Benefits

• Aim base testing• Preparation steps could be

automatically generated• Test coverage could be

automatically verify• All test united

Probability use

New test strategyName Result ProbabilityTest5 Fail 0,9Test9 Success 0,8Test4 Fail 0,7Test7 Fail 0,5Test1 Success 0,4Test3 Success 0,2Test6 Success 0,2Test2 Fail 0,1Test8 Success 0,1

Probability networks use

Search path algorithm use

Test system and bug tracking system integration

State Tester Developer

Defect present bug haven’t postedDefect presentbug postedDefect fixed,bug still openDefect fixedbug closedDefect back, bug can be reproduced

Bug should be reopen Bug can be reproduced

Bug can’t be reproduced There is no bug

Bug wasn’t defined and posted There is a bug

Bug present and reproduces

Bug haven’t fixed yet

Bug doesn’t reproduces, but open Bug is fixed

Test automation technology

Templates creation

State class creation

Test data creation

Define the goal

Test coverage verification

Realization