1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/fallback-symbol.js b/js/src/tests/non262/Intl/fallback-symbol.js
new file mode 100644
index 0000000000..87943257ce
--- /dev/null
+++ b/js/src/tests/non262/Intl/fallback-symbol.js
@@ -0,0 +1,22 @@
+// |reftest| skip-if(!this.hasOwnProperty('Intl'))
+
+function IntlFallbackSymbol(constructor) {
+    return Object.getOwnPropertySymbols(constructor.call(Object.create(constructor.prototype)))[0];
+}
+
+const dateTimeFormatIntlFallbackSymbol = IntlFallbackSymbol(Intl.DateTimeFormat);
+const numberFormatIntlFallbackSymbol = IntlFallbackSymbol(Intl.NumberFormat);
+
+// Intl.DateTimeFormat and Intl.NumberFormat both use the same fallback symbol.
+assertEq(dateTimeFormatIntlFallbackSymbol, numberFormatIntlFallbackSymbol);
+
+const intlFallbackSymbol = dateTimeFormatIntlFallbackSymbol;
+
+// The fallback symbol is a Symbol value.
+assertEq(typeof intlFallbackSymbol, "symbol");
+
+// Test the description of the fallback symbol.
+assertEq(Symbol.prototype.toString.call(intlFallbackSymbol), "Symbol(IntlLegacyConstructedSymbol)");
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);