Issues/47 support xtce unitset

[blakedehaas]

Summary

Adds support for multiple <xtce:Unit> elements within a <xtce:UnitSet>.

Previously, only a single unit was supported. This change allows compound units to be
parsed and serialized in accordance with the XTCE specification.

Changes

• Updated ParameterType.get_units to return:
  • str for a single unit
  • tuple[str, ...] for multiple units
• Updated to_xml to correctly serialize multiple <Unit> elements
• Updated type hints and docstrings for consistency

Testing

• Added test cases for multiple <xtce:Unit> support in:
  • IntegerParameterType
  • FloatParameterType
  • BinaryParameterType
• Verified round-trip XML parsing and serialization
• All tests pass (448 total), no regressions observed

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.80%. Comparing base (946497d) to head (e222883).

Files with missing lines	Patch %	Lines
space_packet_parser/xtce/parameter_types.py	80.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
- Coverage   94.85%   94.80%   -0.05%     
==========================================
  Files          48       48              
  Lines        3885     3892       +7     
==========================================
+ Hits         3685     3690       +5     
- Misses        200      202       +2     

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.91%. Comparing base (946497d) to head (62fdc34).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
+ Coverage   94.85%   94.91%   +0.06%     
==========================================
  Files          48       48              
  Lines        3885     3892       +7     
==========================================
+ Hits         3685     3694       +9     
+ Misses        200      198       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[medley56]

Nice. One test coverage request.

[Copilot]

Pull request overview

Adds support for parsing and serializing multiple <xtce:Unit> elements within a <xtce:UnitSet>, replacing the previous NotImplementedError path. ParameterType.get_units now returns str for a single unit, tuple[str, ...] for compound units, or None. Serialization in both the base ParameterType.to_xml and EnumeratedParameterType.to_xml handles the tuple case.

Changes:

• get_units returns str | tuple[str, ...] | None instead of raising on multiple units.
• to_xml (base and enumerated) serializes each element of a tuple as a separate <Unit> child.
• Updated type hints and docstrings on ParameterType, StringParameterType, BinaryParameterType, BooleanParameterType, and EnumeratedParameterType.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
space_packet_parser/xtce/parameter_types.py	Adds tuple-based compound unit support in parsing and serialization; widens unit parameter types and docstrings.
tests/unit/test_xtce/test_parameter_types.py	Adds round-trip tests with multiple <xtce:Unit> entries for Integer, Float, and Binary parameter types.