Tuesday, January 5, 2016

Testing Principles

by Anuradha Kelum  |  in Testing principles at  9:53 AM

1. Testing is context dependent

We need to do the testing differently for different context. As a example we do test standalone application and webpage in different manner.

2. Exhaustive testing is impossible

Testing everything is impossible for most software product (all combination of inputs). Instead of testing everything we can prioritise test cases/ areas base on the risk attach with it.

3. Early testing

We should start our testing activities early as possible in the SDLC, need to define objectives and goals and should be focus on to achieving defined objectives.

4. Defect clustering

A small number of unit/module/component contains most of the defects reported before the release and found most operational failures after release.

5. Pesticide paradox

If we run the same test case again and again, that test case will not find new bugs. To avoid this we need to update/ review/revise test cases regularly. And need to write new test cases to cover different areas where we found most bugs.

6. testing show presence of defect  

We can show that defects are present using testing but we can't prove that there aren't defects. Testing reduces the risk of defect leakage but if there are no defect reported won't guarantee the correctness of the software. 

7. Absence of errors fallacy  

Finding defect and fixing them will not help if the system/software is unstable and doesn't fulfill the customer/user expectations and requirements. 

Monday, January 4, 2016

Introduction to software tesing

by Anuradha Kelum  |  in software testing at  9:13 AM


Why we need Testing

We all make mistakes. Some of those mistakes are unimportant. But some of them are very expensive and dangerous. So that we need to check everything we deliver as software because people make mistakes. We can make the same mistake if we try to find our own mistakes due to bad assumption and blind spot. So we should get someone else to check our work because another person is more likely to find mistakes. In this blog we try to explain you how doing the software testing.

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