cqframework / cqframework/cql-tests

Add mixed precision interval union, intersect, and except test cases

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Description

Consistent with the change request for clarification of mixed precision interval union, intersect, and except behavior (https://jira.hl7.org/browse/FHIR-57848), add test cases that cover the cases:

Interval[@2025, @2026] union Interval[@2025-10, @2026-02] // Interval[@2025, @2026]

Interval[@2025, @2026] intersect Interval[@2025-10, @2026-02] // Interval[@2025, @2026]

Interval[@2025, @2026] except Interval[@2025-10, @2026-02] // null

NOTE: This should not applied until the above tracker is resolved.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

First review the linked FHIR-57848 change request, since the issue says not to apply this until that tracker is resolved. Then add test cases for mixed-precision union, intersect, and except using the three stated examples; done means those cases are present and pass.

Written by the indexing model from the issue text.

Assessment

Domain
testing
Issue type
Feature
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Clearly specified
Newbie friendliness
52/100

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