Create PredictableImageStyleItokTestTrait
>>> [!note] Migrated issue
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Reported by: [penyaskito](https://www.drupal.org/user/959536)
Related to !869
>>>
<h3 id="overview">Overview</h3>
<p>If you look for </p>
<pre>// Fixate the private key & hash salt to get predictable `itok`.</pre><p>in the tests codebase you will find at least 4 occurrences.</p>
<p>We should move that to a trait.</p>
<h3 id="proposed-resolution">Proposed resolution</h3>
<p>Create a <code>PredictableImageStyleItokTestTrait</code> for our KernelTests to use, with a method <code>setupPredicatableItok()</code>. Replace all duplicated code with a trait usage and call.</p>
<h3 id="ui-changes">User interface changes</h3>
<p>None, just test changes.</p>
issue