1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/prototype/map/this-plain-iterator.js b/js/src/tests/test262/built-ins/Iterator/prototype/map/this-plain-iterator.js
new file mode 100644
index 0000000000..8a243a9889
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/prototype/map/this-plain-iterator.js
@@ -0,0 +1,34 @@
+// |reftest| shell-option(--enable-iterator-helpers) skip-if(!this.hasOwnProperty('Iterator')||!xulRuntime.shell) -- iterator-helpers is not enabled unconditionally, requires shell-options
+// Copyright (C) 2023 Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-iteratorprototype.map
+description: >
+  Iterator.prototype.map supports a this value that does not inherit from Iterator.prototype but implements the iterator protocol
+info: |
+  %Iterator.prototype%.map ( mapper )
+
+features: [iterator-helpers]
+flags: []
+---*/
+let iter = {
+  get next() {
+    let count = 3;
+    return function () {
+      --count;
+      return count >= 0 ? { done: false, value: count } : { done: true, value: undefined };
+    };
+  },
+};
+
+let mapperCalls = 0;
+iter = Iterator.prototype.map.call(iter, function (v) {
+  ++mapperCalls;
+  return v;
+});
+
+for (let e of iter);
+
+assert.sameValue(mapperCalls, 3);
+
+reportCompare(0, 0);