oliverdavies.uk/content/node.1b73b0cd-a0e3-443a-bc6a-edfcbc8d5481.yml

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- value: '2025-05-11T09:00:32+00:00'
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title:
- value: |
Documentation and comments get stale. Tests don't.
created:
- value: '2023-09-22T00:00:00+00:00'
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- value: '2025-05-11T09:00:32+00:00'
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body:
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<p>I'm sure you've seen code comments that say the code will do something when, in fact, it does something different.</p>
<p>Or documentation that has become outdated and stale and no longer correct.</p>
<p>Automated tests and other tools, such as static analysis, are executable documentation, so they can't become stale.</p>
<p>If the implementation code changes and no longer matches the tests, the tests will fail, and either the implementation or test can be updated.</p>
<p>Then, if you need to refer to the test, as long as it's passing, you know what it shows is still applicable.</p>
<p>The same can't be said for markdown files, Confluence pages, Word documents or other static documentation.</p>
format: full_html
processed: |
<p>I'm sure you've seen code comments that say the code will do something when, in fact, it does something different.</p>
<p>Or documentation that has become outdated and stale and no longer correct.</p>
<p>Automated tests and other tools, such as static analysis, are executable documentation, so they can't become stale.</p>
<p>If the implementation code changes and no longer matches the tests, the tests will fail, and either the implementation or test can be updated.</p>
<p>Then, if you need to refer to the test, as long as it's passing, you know what it shows is still applicable.</p>
<p>The same can't be said for markdown files, Confluence pages, Word documents or other static documentation.</p>
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