[darwin] Reset number formatter digits for currency styleupstream/alexshalamov_expression_test_runner

As we are using singleton formatter, fraction digits must be reset
when number formatter is used when initialized for decimal / currency
style.

1 files changed, 4 insertions, 0 deletions

diff --git a/platform/darwin/src/string_nsstring.mm b/platform/darwin/src/string_nsstring.mm
index 096ed2b212..382a2acf33 100644
--- a/platform/darwin/src/string_nsstring.mm
+++ b/platform/darwin/src/string_nsstring.mm
@@ -43,6 +43,10 @@ std::string formatNumber(double number, const std::string& localeId, const std::
         numberFormatter.maximumFractionDigits = maxFractionDigits;
         numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;
     } else {
+        // Reset fraction digits to NSNumberFormatter's default values, so that the
+        // system will choose formatting based on number formatter locale.
+        numberFormatter.minimumFractionDigits = 0;
+        numberFormatter.maximumFractionDigits = 0;
         numberFormatter.numberStyle = NSNumberFormatterCurrencyStyle;
     }
     NSString *formatted = [numberFormatter stringFromNumber:@(number)];