Fix NumberParser getSymbols rounding support (#7186)

Author: snowystinger

packages/@internationalized/number/src/NumberParser.ts

@@ -255,7 +255,14 @@ const pluralNumbers = [
 
 function getSymbols(locale: string, formatter: Intl.NumberFormat, intlOptions: Intl.ResolvedNumberFormatOptions, originalOptions: Intl.NumberFormatOptions): Symbols {
   // formatter needs access to all decimal places in order to generate the correct literal strings for the plural set
-  let symbolFormatter = new Intl.NumberFormat(locale, {...intlOptions, minimumSignificantDigits: 1, maximumSignificantDigits: 21});
+  let symbolFormatter = new Intl.NumberFormat(locale, {...intlOptions,
+    // Resets so we get the full range of symbols
+    minimumSignificantDigits: 1,
+    maximumSignificantDigits: 21,
+    roundingIncrement: 1,
+    roundingPriority: 'auto',
+    roundingMode: 'halfExpand'
+  });
   // Note: some locale's don't add a group symbol until there is a ten thousands place
   let allParts = symbolFormatter.formatToParts(-10000.111);
   let posAllParts = symbolFormatter.formatToParts(10000.111);

packages/@internationalized/number/test/NumberParser.test.js

@@ -165,6 +165,14 @@ describe('NumberParser', function () {
       });
     });
 
+    describe('NumberFormat options', function () {
+      it('supports roundingIncrement', function () {
+        expect(new NumberParser('en-US', {roundingIncrement: 2}).parse('10')).toBe(10);
+        // This doesn't fail in Node 18 because roundingIncrement isn't on the resolved options. Hopefully later versions of Node this test will be meaningful.
+        expect(new NumberParser('en-US', {roundingIncrement: 2, minimumFractionDigits: 2, maximumFractionDigits: 2}).parse('10.00')).toBe(10.00);
+      });
+    });
+
     describe('round trips', function () {
       // Locales have to include: 'de-DE', 'ar-EG', 'fr-FR' and possibly others
       // But for the moment they are not properly supported