What Are Testing Axioms?
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What Are Testing Axioms?

In software testing field, there are several so called ‘fundamental truths’ which every tester should know and keep during checking mobile or web software products. These statements are verified and supported by constant practice and the rich experience of various testers.

Testing Axioms Are the Following:

  • The complete testing is impossible.
  • The quality control is always risk-based.
  • The absence of bugs cannot be shown with the help of testing.
  • One discovered error causes the appearance of many other bugs.

An unexperienced tester may believe that he is able to detect all bugs of the software product. He is sure that no errors, any at all, will be missed. But it is impossible to check every system element, every input variable, etc.

Why Is It Impossible to Completely Test a Product?

  • The quantity of potential input combinations is huge.
  • In accordance, the number of possible outputs is very large too.
  • The amount of available paths through the software is huge.
  • The product specification is not objective. A tester may discover an issue, but a stakeholder does not find it to be a real bug.

The whole life is not enough to check all test conditions and develop a perfect product. To check every product aspect may require even the work of whole generation of testers. So a specialist should keep this statement in mind during functional testing or performance testing.

As it is not possible to check all test scenarios, then the untested areas will be certainly left. That is why software testing is a risk-based activity. One cannot know where there may be bugs and where not. If a tester misses a serious bug and discovers it after the release, then the cost of this bug will be very high.

Usually bugs do not appear one by one, sometimes they are interconnected. A tester should be careful when he has discovered one error during black box testing or usability testing, because nearby there may be several more bugs. It can be easily explained.

Why May Bugs Follow Each Other?

  • It was a bad day for a programmer. The developer’s low spirit or a bad mood influences the quality of work. In such a case, the code will be raw.
  • People are slaves of their habits. The developers may repeat the same mistake again and again.
  • ne bug may be only the tip of the iceberg. At first sight, some bugs may seem to be unrelated. But if one examines them closely and deep, he will find out that the whole design or architecture does not match the specification at all.


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