unstructured

6c1bbb37 - test: add check crop box padding to save_elements test (#4123)

test: add check crop box padding to save_elements test (#4123) Updated `save_elements` test to check the behavior of the environment variables `EXTRACT_IMAGE_BLOCK_CROP_HORIZONTAL_PAD` and `EXTRACT_IMAGE_BLOCK_CROP_VERTICAL_PAD` that pad the crop box for image extraction. <!-- CURSOR_SUMMARY --> --- > [!NOTE] > Enhances save_elements tests to validate crop-box padding via env vars and image dimensions for both payload and file outputs; bumps version and updates changelog. > > - **Tests (pdf_image_utils)**: > - `test_save_elements` now parametrizes `horizontal_padding`/`vertical_padding`, sets `EXTRACT_IMAGE_BLOCK_CROP_HORIZONTAL_PAD` and `EXTRACT_IMAGE_BLOCK_CROP_VERTICAL_PAD`, and asserts padded image dimensions for both `extract_image_block_to_payload` paths (decoding `image_base64` or reading saved file). > - Adds required imports (`base64`, `io`). > - **Versioning**: > - Update `unstructured/__version__.py` to `0.18.21-dev0`. > - Add CHANGELOG entry noting the unit test enhancement. > > ^{Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit a23bf6a9e7fb67f35c2aa16cc409d2de92886db8. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).} <!-- /CURSOR_SUMMARY -->