FA-64223 / Medication dosing calculations / Member archive

Concentration and electrolyte unit conversions: unknown kind handling · case 03

An unsupported unit silently converts to 0.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input {kind, value, mw?, valence?}. kind "pct": w/v percent to mg/mL (x10). kind "ratio": "a:b" ratio strength (a g in b mL) to mg/mL = a*1000/b, whitespace around parts allowed. kind "meq_to_mg": mg = mEq*mw/|valence|. kind "mmol_to_meq": mEq = mmol*|valence|. Any other kind returns {error: UNKNOWN_KIND}. Otherwise {result} rounded to 4 decimals.

Why this case matters

Strength labels mix percent, ratio and equivalent units; each conversion has its own orientation and sign rule.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
unknown conversion kind	`{"result": 0.0}`	`{"error": "UNKNOWN_KIND"}`	Failed

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