How the Grinch Stole Testing Noise, Noise, Noise!

How the Grinch Stole Testing

Noise, Noise, Noise!

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The Grinch didn’t think very much

of testing,In fact he found

the whole process un-resting.

All the Noise Noise Noise

What is Noise?

Incorrect messages Unhelpful messages Irrelevant messages Anything I don't need to hear Anything I don't want to hear

Why is Testing Noisy?

Poor tools Poor config Poor strategy Poor design Poor policy

Test Design

Plan Code review Does the test prove my point? Does failure pinpoint the problem?

Test Configuration

Testing code you won't change Running tests you plan to fix "someday" - someday will never come

8

Toning it Down

Suppressions Unit test assertions Static analysis

By file By type By age By severity

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Test Maintenance

Run regularly – Entropy Increases Turn off low value to noise ratio tests Keeping it clean is better than periodic mass cleaning

Relevance

Am I testing for things that are happening QA results Code reviews field bugs For things expected to happen? Security performance

Risk management

Will it happen? Is it worth preventing? Owasp top ten example

Q&A

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Inspired by “How the Grinch Stole Christmas” by Doctor Seuss