1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/NativeErrors/AggregateError/newtarget-proto-custom.js b/js/src/tests/test262/built-ins/NativeErrors/AggregateError/newtarget-proto-custom.js
new file mode 100644
index 0000000000..0cf7359a59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/NativeErrors/AggregateError/newtarget-proto-custom.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-aggregate-error
+description: >
+  Use a custom NewTarget prototype
+info: |
+  AggregateError ( errors, message )
+
+  1. If NewTarget is undefined, let newTarget be the active function object, else let newTarget be NewTarget.
+  2. Let O be ? OrdinaryCreateFromConstructor(newTarget, "%AggregateError.prototype%", « [[ErrorData]], [[AggregateErrors]] »).
+  ...
+  6. Return O.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  ...
+  3. Let proto be ? Get(constructor, "prototype").
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  Return proto.
+features: [AggregateError, Reflect.construct]
+---*/
+
+var custom = { x: 42 };
+var newt = new Proxy(function() {}, {
+  get(t, p) {
+    if (p === 'prototype') {
+      return custom;
+    }
+
+    return t[p];
+  }
+});
+
+var obj = Reflect.construct(AggregateError, [[]], newt);
+
+assert.sameValue(Object.getPrototypeOf(obj), custom);
+assert.sameValue(obj.x, 42);
+
+reportCompare(0, 0);