1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/NumberFormat/toStringTag.js b/js/src/tests/non262/Intl/NumberFormat/toStringTag.js
new file mode 100644
index 0000000000..9ad0901a0b
--- /dev/null
+++ b/js/src/tests/non262/Intl/NumberFormat/toStringTag.js
@@ -0,0 +1,29 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var desc = Object.getOwnPropertyDescriptor(Intl.NumberFormat.prototype, Symbol.toStringTag);
+
+assertEq(desc !== undefined, true);
+assertEq(desc.value, "Intl.NumberFormat");
+assertEq(desc.writable, false);
+assertEq(desc.enumerable, false);
+assertEq(desc.configurable, true);
+
+assertEq(Object.prototype.toString.call(Intl.NumberFormat.prototype), "[object Intl.NumberFormat]");
+assertEq(Object.prototype.toString.call(new Intl.NumberFormat), "[object Intl.NumberFormat]");
+
+Object.defineProperty(Intl.NumberFormat.prototype, Symbol.toStringTag, {value: "NumberFormat"});
+
+assertEq(Object.prototype.toString.call(Intl.NumberFormat.prototype), "[object NumberFormat]");
+assertEq(Object.prototype.toString.call(new Intl.NumberFormat), "[object NumberFormat]");
+
+delete Intl.NumberFormat.prototype[Symbol.toStringTag];
+
+assertEq(Object.prototype.toString.call(Intl.NumberFormat.prototype), "[object Object]");
+assertEq(Object.prototype.toString.call(new Intl.NumberFormat), "[object Object]");
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);