Feat: Contains validator

[Meldiron]

No description provided.

[greptile-apps]

Greptile Summary

This PR introduces a new Contains validator that checks whether a string contains at least one of the predefined substrings, with optional case-insensitive matching via mb_strtolower and UTF-8 encoding.

• Adds src/Validator/Contains.php with constructor validation (empty-pattern guard), non-strict/strict matching, and proper Unicode handling using mb_strtolower('UTF-8').
• Adds tests/Validator/ContainsTest.php with thorough coverage: single/multiple patterns, strict/loose modes, Unicode, multilines, empty strings, and non-string values.

Confidence Score: 4/5

The core validation logic is correct and the test suite is thorough, but unresolved issues flagged in prior review threads about non-string pattern elements causing unhandled TypeErrors should be addressed before merging.

The new Contains validator is well-structured: it correctly guards against non-string values, uses mb_strtolower with explicit UTF-8 encoding, and is backed by comprehensive tests. The outstanding concern raised in prior threads — that non-string elements inside the $patterns array trigger an unhandled TypeError in both isValid() and getDescription() — remains unaddressed in this revision.

src/Validator/Contains.php — specifically the constructor, which does not validate that all elements of $patterns are strings.

Important Files Changed

Filename	Overview
src/Validator/Contains.php	New Contains validator — solid implementation with correct UTF-8 handling; non-string elements inside $patterns still cause an unhandled TypeError (noted in prior review threads).
tests/Validator/ContainsTest.php	Comprehensive test coverage across strict/loose modes, Unicode, multiline, empty patterns, and non-string values.

_{Reviews (3): Last reviewed commit: "Merge branch 'feat-contains-validator' o..." | Re-trigger Greptile}

[Meldiron]

lgtm