Refactor the NotEmoji rule

[henriquemoody]

Since we have the ability to use not as a prefix, having rules that validate negative behaviour makes them a bit inflexible, verbose, and harder to understand.

This commit will refactor the NotEmoji and rename it to Emoji. It will no longer check if the string contains emojis, but rather if the string is an emoji or not. I’m also adding support to more emojis, since the rule was a bit outdated.

This change will make the validator more strict, but will make it useful in other scenarios. However, later on, I would like to create a rule called has which, could use a validator like Emoji to check if the input has emojis.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.49%. Comparing base (a37cac7) to head (951c16e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1576   +/-   ##
=========================================
  Coverage     97.49%   97.49%           
  Complexity      987      987           
=========================================
  Files           205      205           
  Lines          2235     2235           
=========================================
  Hits           2179     2179           
  Misses           56       56           

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[Copilot]

Pull request overview

This PR refactors the NotEmoji rule to Emoji, inverting its validation logic from "does not contain emoji" to "is an emoji (or sequence of emojis)". This change makes the rule more flexible and aligns with the validation framework's pattern of using the not() prefix for negative assertions. The implementation now uses a modern Unicode-based regex pattern with support for skin tone modifiers, ZWJ sequences, flags, and keycap sequences.

Key Changes:

• Renamed NotEmoji to Emoji with inverted validation logic (checks if input IS an emoji, not if it contains one)
• Updated regex pattern from explicit Unicode ranges to a more maintainable pattern using \p{Extended_Pictographic} property
• Added comprehensive test coverage for emoji versions up to Emoji 16.0 (2024), including complex sequences

Reviewed changes

Copilot reviewed 25 out of 26 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
library/Rules/Emoji.php	New rule implementation using Unicode property classes and supporting modern emoji sequences
library/Rules/NotEmoji.php	Removed old rule with hardcoded Unicode ranges
library/Transformers/Prefix.php	Updated to include emoji in rules to skip prefix transformation
library/Mixins/*.php	Updated all mixin interfaces to rename notEmoji() to emoji()
tests/unit/Rules/EmojiTest.php	New comprehensive test suite with 60+ emoji test cases covering various Unicode versions
tests/unit/Rules/NotEmojiTest.php	Removed old test file
tests/feature/Rules/EmojiTest.php	New feature tests for default and inverted templates
tests/feature/Rules/NotEmojiTest.php	Removed old feature tests
tests/unit/Transformers/PrefixTest.php	Updated test to reflect emoji as an untransformed rule name
docs/rules/Emoji.md	New documentation explaining emoji validation with examples and supported sequences
docs/rules/NotEmoji.md	Removed old documentation
docs/rules/*.md	Updated cross-references from NotEmoji to Emoji
docs/09-list-of-rules-by-category.md	Reorganized rule listings to replace NotEmoji with Emoji
bin/create-mixin	Removed NotEmoji from the deny list and added code formatting improvements

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