GEN-3d: dominance tiebreak — unknown locus resolves to wild-type reading (unknown-C => full-colour, not c[h] white; markers default unmarked)

gerbil-manager-web/src/genetics/__tests__/genetics.test.ts

@@ -379,3 +379,23 @@ describe('GEN-3c: no Unbekannt when the E locus is known (family fallback)', ()
     expect(farbschlagFor(fromDisplayString('aa C- DD EE GG PP spsp rere')).unknown).toBe(false)
   })
 })
+
+describe('GEN-3d: dominance tiebreak for unknown loci', () => {
+  it('unknown-C reads as full-colour, NOT a c^h/c^chm white', () => {
+    // 'aa C- DD EE GG PP' -> Schwarz (dominant C reading), never PEW/Hermelin/Himalaya.
+    const name = genotypeToFarbschlag(fromDisplayString('aa C- DD EE GG PP spsp rere'))
+    expect(name).toBe('Schwarz')
+    expect(['Pink Eyed White (PEW)', 'Hermelin', 'Himalaya']).not.toContain(name)
+  })
+
+  it('unknown second marker allele defaults UNMARKED, not Schecke (marker-aware)', () => {
+    // 'sp-' (one sp + unknown) -> sp/sp -> no Schecke (naive most-dominant would wrongly add it).
+    expect(genotypeToFarbschlag(fromDisplayString('AA CC DD EE GG PP sp- rere'))).toBe('Agouti')
+  })
+
+  it('still: eef with unknowns -> Fuchsschimmel (family pin unaffected by tiebreak)', () => {
+    expect(genotypeToFarbschlag(fromDisplayString('aa C- D- eef Gg Pp spsp --'))).toBe(
+      'Fuchsschimmel',
+    )
+  })
+})