1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/RelativeTimeFormat/construct-newtarget.js b/js/src/tests/non262/Intl/RelativeTimeFormat/construct-newtarget.js
new file mode 100644
index 0000000000..c20c07434e
--- /dev/null
+++ b/js/src/tests/non262/Intl/RelativeTimeFormat/construct-newtarget.js
@@ -0,0 +1,21 @@
+// |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 obj = new Intl.RelativeTimeFormat();
+
+// Test that new RTF produces an object with the right prototype.
+assertEq(Object.getPrototypeOf(obj), Intl.RelativeTimeFormat.prototype);
+
+// Test subclassing %Intl.RelativeTimeFormat% works correctly.
+class MyRelativeTimeFormat extends Intl.RelativeTimeFormat {}
+
+var obj = new MyRelativeTimeFormat();
+assertEq(obj instanceof MyRelativeTimeFormat, true);
+assertEq(obj instanceof Intl.RelativeTimeFormat, true);
+assertEq(Object.getPrototypeOf(obj), MyRelativeTimeFormat.prototype);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);