fix(range) Handle nullish values

core/src/utils/floating-point/floating-point.spec.ts

@@ -11,12 +11,24 @@ describe('floating point utils', () => {
       const n = getDecimalPlaces(5);
       expect(n).toBe(0);
     });
+
+    it('should handle nullish values', () => {
+      expect(getDecimalPlaces(undefined as any)).toBe(0);
+      expect(getDecimalPlaces(null as any)).toBe(0);
+      expect(getDecimalPlaces(NaN as any)).toBe(0);
+    });
   });
 
   describe('roundToMaxDecimalPlaces', () => {
     it('should round to the highest number of places as references', async () => {
       const n = roundToMaxDecimalPlaces(5.12345, 1.12, 2.123);
       expect(n).toBe(5.123);
     });
+
+    it('should handle nullish values', () => {
+      expect(roundToMaxDecimalPlaces(undefined as any)).toBe(0);
+      expect(roundToMaxDecimalPlaces(null as any)).toBe(0);
+      expect(roundToMaxDecimalPlaces(NaN as any)).toBe(0);
+    })
   });
 });

core/src/utils/floating-point/index.ts

@@ -1,4 +1,7 @@
+import { isSafeNumber } from '../type-guards.ts';
+
 export function getDecimalPlaces(n: number) {
+  if (!isSafeNumber(n)) return 0;
   if (n % 1 === 0) return 0;
   return n.toString().split('.')[1].length;
 }
@@ -36,6 +39,7 @@ export function getDecimalPlaces(n: number) {
  * be used as a reference for the desired specificity.
  */
 export function roundToMaxDecimalPlaces(n: number, ...references: number[]) {
+  if (!isSafeNumber(n)) return 0;
   const maxPlaces = Math.max(...references.map((r) => getDecimalPlaces(r)));
   return Number(n.toFixed(maxPlaces));
 }

core/src/utils/type-guards.ts

@@ -0,0 +1,6 @@
+/** 
+ * Checks input for usable number. Not NaN and not Infinite.
+ */
+export const isSafeNumber = (input: unknown): input is number => {
+  return typeof input === 'number' && !isNaN(input) && isFinite(input);
+};