fix: correct types for resolveCurrencyFormat (#139)

Author: connor-baer

src/lib/number-format/index.ts

@@ -355,6 +355,7 @@ export const resolveCurrencyFormat = resolveNumberFormatFactory(
   getCurrencyOptions,
 ) as (
   locales?: Locale | Locale[],
+  currency?: Currency,
   options?: Intl.NumberFormatOptions,
 ) => NumberFormat | null;
 

src/tests/format.spec.ts

@@ -50,10 +50,22 @@ describe('Format', () => {
       });
     });
 
+    it('should accept a custom currency', () => {
+      const locale = 'xx-XX';
+      const currency = 'XXX';
+      const actual = formatCurrency(number, locale, currency);
+      expect(actual).toBeString();
+      expect(Intl.NumberFormat).toHaveBeenCalledWith(locale, {
+        style: 'currency',
+        currency,
+      });
+    });
+
     it('should format as a unitless number if currency is not found', () => {
-      const actual = formatCurrency(number, 'xx-XX');
+      const locale = 'xx-XX';
+      const actual = formatCurrency(number, locale);
       expect(actual).toBeString();
-      expect(Intl.NumberFormat).toHaveBeenCalledWith('xx-XX', {
+      expect(Intl.NumberFormat).toHaveBeenCalledWith(locale, {
         style: 'decimal',
       });
     });

src/tests/formatToParts.spec.ts

@@ -49,5 +49,16 @@ describe('Format to parts', () => {
         currency: expect.any(String),
       });
     });
+
+    it('should accept a custom currency', () => {
+      const locale = 'xx-XX';
+      const currency = 'XXX';
+      const actual = formatCurrencyToParts(number, locale, currency);
+      expect(actual).toBeArray();
+      expect(Intl.NumberFormat).toHaveBeenCalledWith(locale, {
+        style: 'currency',
+        currency,
+      });
+    });
   });
 });

src/tests/resolveFormat.spec.ts

@@ -37,5 +37,16 @@ describe('Resolve format', () => {
         currency: expect.any(String),
       });
     });
+
+    it('should accept a custom currency', () => {
+      const locale = 'xx-XX';
+      const currency = 'XXX';
+      const actual = resolveCurrencyFormat(locale, currency);
+      expect(actual).toBeObject();
+      expect(Intl.NumberFormat).toHaveBeenCalledWith(locale, {
+        style: 'currency',
+        currency,
+      });
+    });
   });
 });