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# Description of Changes - **What was changed** - Relocated and refactored unit tests: - `TextFinderTest` and `RedactControllerTest` moved under `app/core/src/test/...` to align with module structure. - Expanded test coverage: whole-word vs. partial matches, complex regexes (emails, SSNs, IPs, currency), international/accented characters, multi-page documents, malformed PDFs, operator preservation, color decoding, and performance assertions. - **API adjustments in redaction flow**: - `createTokensWithoutTargetText(...)` now accepts the `PDDocument` alongside `PDPage` to properly manage resources/streams. - Introduced/used `createPlaceholderWithFont(...)` to maintain text width with explicit font context. - **Bug fix in `TextFinder`**: - Early-return when the (trimmed) search term is empty to prevent unnecessary processing and avoid false positives/errors. - Minor cleanup (removed redundant `super()` call) and improved guard logic around regex/whole-word wrapping. - **Why the change was made** - Improve reliability and determinism of PDF redaction and text finding by exercising real-world patterns and edge cases. - Ensure structural PDF operators (graphics/positioning) are preserved during token filtering. - Prevent crashes or misleading matches when users provide empty/whitespace-only search terms. - Align tests with the current project layout and increase maintainability. --- ## Checklist ### General - [x] I have read the [Contribution Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md) - [x] I have read the [Stirling-PDF Developer Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md) (if applicable) - [ ] I have read the [How to add new languages to Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md) (if applicable) - [x] I have performed a self-review of my own code - [x] My changes generate no new warnings ### Documentation - [ ] I have updated relevant docs on [Stirling-PDF's doc repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/) (if functionality has heavily changed) - [ ] I have read the section [Add New Translation Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags) (for new translation tags only) ### UI Changes (if applicable) - [ ] Screenshots or videos demonstrating the UI changes are attached (e.g., as comments or direct attachments in the PR) ### Testing (if applicable) - [ ] I have tested my changes locally. Refer to the [Testing Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing) for more details.