[react-i18n] Fix unformatCurrency utility stripping significant digits on RSD currency

packages/react-i18n/CHANGELOG.md

@@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-<!-- ## Unreleased -->
+<!-- Unreleased -->
+
+- Fixed `currencyDecimalSymbol` function returning `DECIMAL_NOT_SUPPORTED` for RSD [#1902](https://github.com/Shopify/quilt/pull/1902)
 
 ## 5.3.4 - 2021-04-13
 

packages/react-i18n/src/i18n.ts

@@ -582,6 +582,7 @@ export class I18n {
     const templatedInput = 1;
     const decimal = this.formatCurrency(templatedInput, {
       currency: currencyCode,
+      form: 'short',
     })
       .replace(symbol, '')
       .replace(digitOrSpace, '');

packages/react-i18n/src/test/i18n.test.ts

@@ -862,6 +862,17 @@ describe('I18n', () => {
       expect(i18n.unformatCurrency('1', 'USD')).toBe('1.00');
     });
 
+    it('handles formatted RSD input', () => {
+      getCurrencySymbol.mockReturnValue({
+        symbol: 'RSD',
+        prefixed: true,
+      });
+
+      const i18n = new I18n(defaultTranslations, defaultDetails);
+      expect(i18n.unformatCurrency('1,234.55', 'RSD')).toBe('1234.55');
+      expect(i18n.unformatCurrency('1', 'RSD')).toBe('1.00');
+    });
+
     describe('prefixed symbols', () => {
       it('handles prefix with a space', () => {
         getCurrencySymbol.mockReturnValue(mockSymbolResult);