fix(core): keep sign of negative numbers in convertToAbbreviationString

[kwy404]

What is the current behavior?

Root cause: convertToAbbreviationString (exported from @siemens/ix) compares Math.abs(num) against each unit and then overwrites num with the rounded absolute value, so the minus sign is lost. convertToAbbreviationString(-1500) returns 1.5K and convertToAbbreviationString(-2000000) returns 2M. Numbers with an absolute value below 1000 are not affected because they never enter that branch.

GitHub Issue Number: none

What is the new behavior?

• The rounded absolute value is multiplied by Math.sign(num), so -1500 returns -1.5K and -2000000 returns -2M. Positive numbers are unchanged, and rounding stays symmetric (-1450 gives -1.5K like 1450 gives 1.5K).
• Added utils/test/rwd.util.spec.ts. The negative case fails before the fix (expected '1.5K' to be '-1.5K') and passes after it.
• Added a patch changeset for @siemens/ix.

Checklist

A pull request can only be merged if all of these conditions are met (where applicable):

• Accessibility (a11y) features were implemented
• Internationalization (i18n) - no hard coded strings
• Responsiveness - components handle viewport changes and content overflow gracefully
• Add or update a Storybook story
• Documentation was reviewed/updated siemens/ix-docs
• Unit tests were added/updated and pass (pnpm test)
• Visual regression tests were added/updated and pass (Guide)
• Static code analysis passes (pnpm lint)
• Successful compilation (pnpm build, changes pushed)

Help & support

Validation: the new spec passes with vitest run --project spec, ESLint and Prettier pass on the changed files, and stencil build succeeds for @siemens/ix. No visual change, so no visual regression or docs updates are needed.

Summary by CodeRabbit

• Bug Fixes
  • Negative values now retain their minus sign when displayed in abbreviated formats, such as -1.5K and -2M.

[changeset-bot]

🦋 Changeset detected

Latest commit: b3af10e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@siemens/ix	Patch
@siemens/ix-angular	Patch
@siemens/ix-react	Patch
@siemens/ix-vue	Patch

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coderabbitai]

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository: siemens/ix/.coderabbit.yaml

Review profile: ASSERTIVE

Plan: Advanced

Run ID: 704238e4-130d-4b97-b1a2-cbfdfddd6f56

📥 Commits

Reviewing files that changed from the base of the PR and between 94b305c and b3af10e.

📒 Files selected for processing (3)

• .changeset/fix-abbreviation-negative-sign.md
• packages/core/src/components/utils/rwd.util.ts
• packages/core/src/components/utils/test/rwd.util.spec.ts

Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 1 remain after this review.

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📝 Walkthrough

Walkthrough

convertToAbbreviationString now preserves the sign of negative values when it abbreviates them. Tests cover positive and negative values at thousand and million scales.

Changes

Abbreviation Sign Handling

Layer / File(s)	Summary
Sign preservation and validation packages/core/src/components/utils/rwd.util.ts, packages/core/src/components/utils/test/rwd.util.spec.ts, .changeset/fix-abbreviation-negative-sign.md	The utility applies the input sign to the rounded abbreviated value. Tests cover positive and negative values at thousand and million scales. A patch changeset describes the fix.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Bug fix · Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to b3af1

Negative abbreviated values retain their sign, with tests for thousand and million values. No actionable merge-blocking risk is evident; the PR appears ready after normal checks.

Architecture Summary

Architecture risk: 🔵 Low · up to b3af1

The change affects 1 system.

Changed systems: packages/core

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — packages/core (ui) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in packages/core/src/components/utils/rwd.util.ts: Abbreviated values are now rounded from their absolute magnitude and multiplied by the input’s sign; previously, rounding the magnitude discarded negative signs.
• observed — Modified behavior in packages/core/src/components/utils/test/rwd.util.spec.ts: Added tests asserting abbreviation output for positive and negative values at the thousand and million scales.
• observed — Modified behavior in .changeset/fix-abbreviation-negative-sign.md: Adds a patch changeset for @siemens/ix stating that convertToAbbreviationString previously omitted the minus sign when abbreviating negative numbers.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: preserving the sign of negative numbers in convertToAbbreviationString.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[danielleroux]

Looks good thank you 🎉