1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/proto-from-ctor-realm.js b/js/src/tests/test262/built-ins/Iterator/proto-from-ctor-realm.js
new file mode 100644
index 0000000000..ffae2a51cb
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/proto-from-ctor-realm.js
@@ -0,0 +1,39 @@
+// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
+// Copyright (C) 2020 Rick Waldron. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-iterator
+description: Default [[Prototype]] value derived from realm of the NewTarget.
+features: [cross-realm, iterator-helpers, Reflect, Symbol]
+---*/
+
+let other = $262.createRealm().global;
+let newTarget = new other.Function();
+let ai;
+
+newTarget.prototype = undefined;
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+newTarget.prototype = null;
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+newTarget.prototype = true;
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+newTarget.prototype = '';
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+newTarget.prototype = Symbol();
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+newTarget.prototype = 0;
+ai = Reflect.construct(Iterator, [1], newTarget);
+assert.sameValue(Object.getPrototypeOf(ai), other.Iterator.prototype);
+
+reportCompare(0, 0);