Add tests for mrtrix utils + tsf export

[mattcieslak]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 90.69767% with 48 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.67%. Comparing base (4c9e697) to head (6da9540).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
include/trx/trx.tpp	81.27%	44 Missing ⚠️
tests/test_trx_io.cpp	98.54%	3 Missing ⚠️
tests/test_trx_mmap.cpp	98.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #26       +/-   ##
===========================================
+ Coverage   73.40%   85.67%   +12.26%     
===========================================
  Files          18        9        -9     
  Lines        2824     2917       +93     
  Branches      466      462        -4     
===========================================
+ Hits         2073     2499      +426     
+ Misses        751      418      -333     

Flag	Coverage Δ
linux	85.93% <91.03%> (+12.52%)	⬆️
macos	85.50% <90.37%> (?)

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[Copilot]

Pull request overview

This pull request adds comprehensive test coverage for MRtrix utilities and TSF (Track Scalars File) export functionality in the TRX library. The changes enhance the library's ability to handle both text and binary TSF formats, with proper support for endianness conversion and robust error handling.

Changes:

• Added tests for utility functions including dtype detection, dtype code mapping, and path normalization
• Implemented binary TSF format support in add_dpv_from_tsf with endianness handling for Float32/Float64 LE/BE formats
• Added new export_dpv_to_tsf function to export data-per-vertex to TSF format with proper header alignment and binary encoding
• Enhanced test coverage with helper functions for TSF file generation and validation
• Updated codecov configuration to exclude third_party and examples directories

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
tests/test_trx_mmap.cpp	Added tests for path normalization, dtype size mappings, and dtype code conversions to ensure utility functions work correctly
tests/test_trx_io.cpp	Added comprehensive test suite for TSF import/export with test helpers, covering both success and error scenarios for text/binary formats
include/trx/trx.tpp	Enhanced add_dpv_from_tsf to support binary TSF formats with endianness conversion; added new export_dpv_to_tsf function for TSF export
include/trx/trx.h	Added function declaration for export_dpv_to_tsf and necessary includes for the new functionality
codecov.yml	Updated coverage configuration to ignore third_party and examples directories from coverage reports

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