feat: validate that @depends tags have both a domain and column

[matthew-phelps]

Pull request

Summary

Closes #69

tags_to_depends() silently produced an empty-string domain when a @depends tag had only one value (e.g., @depends USUBJID). This adds validation matching what tags_to_params() already does for @param tags.

Changes Made

• Added validation in tags_to_depends() that checks both domain and column are non-empty, aborting with a clear error listing the invalid tags
• Fixed @depends limit → @depends domain limit in the test_coverage.mustache test fixture
• Added error-case tests for single-value and mixed valid/invalid @depends tags

Testing

• Added tests for tags_to_depends("USUBJID") and tags_to_depends(c("data1 var1", "USUBJID")) both expecting errors
• Full test suite passes

Checklist

• Code changes have been tested
• Documentation has been updated, if applicable
• All automated tests pass
• Coding style and naming conventions have been followed
• The PR is ready for review and merge

[github-actions]

Code coverage

Name	Coverage (%)
mighty.component	100
R/component.R	100
R/custom_r.R	100
R/mighty_component_rendered.R	100
R/mighty_component_test.R	100
R/mighty_component.R	100
R/standard.R	100
R/utils-validation.R	100
R/validate_component_code.R	100
R/validate_implicit_join.R	100

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[github-actions]

Github pages

Review the pkgdown webpage for the PR here