I have tested this item ✅ successfully on 8ae628e

Tested by review:

• Reviewed that test cases and test data make sense.
• Checked in logs of unit tests CI action that more tests and assertions have run for this PR compared to the current 5.4-dev branch, and that no new PHP deprecation messages were created by the new test cases.

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  _{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46723.}

I have tested this item ✅ successfully on 6a1e2c0

Tests look correct based on the regex. Quick question: Should we add a test case for whitespace (e.g., ' true ')? I assume the BooleanRule is intended to be strict and reject untrimmed values, so adding that as a negative test case explicitly would confirm that behavior.

I have tested this item ✅ successfully on 6a1e2c0

Tests look correct based on the regex. Quick question: Should we add a test case for whitespace (e.g., ' true ')? I assume the BooleanRule is intended to be strict and reject untrimmed values, so adding that as a negative test case explicitly would confirm that behavior.

I have tested this item ✅ successfully on 6a1e2c0

Tests look correct based on the regex. Quick question: Should we add a test case for whitespace (e.g., ' true ')? I assume the BooleanRule is intended to be strict and reject untrimmed values, so adding that as a negative test case explicitly would confirm that behavior.

I have tested this item ✅ successfully on 6a1e2c0

Tests look correct based on the regex. Quick question: Should we add a test case for whitespace (e.g., ' true ')? I assume the BooleanRule is intended to be strict and reject untrimmed values, so adding that as a negative test case explicitly would confirm that behavior.

RTC

✅ Final test before merge with JBT

• Seen before: Tests: 920, Assertions: 1423, Skipped: 1.
• Applied PR with gh pr checkout 46723
• Seen Tests: 1129, Assertions: 1632, Skipped: 1.

Thank you @heelc29 for your contribution. Thank you @brianteeman for support. Thank you @465645 and @brianteeman for testing.