1 files changed, 94 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/map/proxy-accesses.js b/js/src/tests/non262/Iterator/prototype/map/proxy-accesses.js
new file mode 100644
index 0000000000..ba6dfd7ece
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/map/proxy-accesses.js
@@ -0,0 +1,94 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+//
+
+/*---
+esid: pending
+description: %Iterator.prototype%.map accesses specified properties only.
+info: >
+features: [iterator-helpers]
+---*/
+
+const handlerProxy = log => new Proxy({}, {
+  get: (target, key, receiver) => (...args) => {
+    const target = args[0];
+    const item = Reflect[key](...args);
+
+    log.push(`${key}: ${args.filter(x => typeof x != 'object').map(x => x.toString())}`);
+
+    switch (typeof item) {
+      case 'function': return item.bind(new Proxy(target, handlerProxy(log)));
+      case 'object': return new Proxy(item, handlerProxy(log));
+      default: return item;
+    }
+  },
+});
+
+const log = [];
+const iterator = Object.setPrototypeOf({
+  next: function() {
+    if (this.value < 3)
+      return { done: false, value: this.value++ };
+    return { done: true, value: undefined };
+  },
+  value: 0,
+}, Iterator.prototype);
+const iteratorProxy = new Proxy(iterator, handlerProxy(log));
+const mappedProxy = iteratorProxy.map(x => x);
+
+for (const item of mappedProxy) {
+}
+
+assertEq(
+  log.join('\n'),
+`get: map
+get: next
+get: value
+get: value
+getOwnPropertyDescriptor: value
+has: enumerable
+get: enumerable
+has: configurable
+get: configurable
+has: value
+get: value
+has: writable
+get: writable
+has: get
+has: set
+defineProperty: value
+set: value,1
+get: value
+get: value
+getOwnPropertyDescriptor: value
+has: enumerable
+get: enumerable
+has: configurable
+get: configurable
+has: value
+get: value
+has: writable
+get: writable
+has: get
+has: set
+defineProperty: value
+set: value,2
+get: value
+get: value
+getOwnPropertyDescriptor: value
+has: enumerable
+get: enumerable
+has: configurable
+get: configurable
+has: value
+get: value
+has: writable
+get: writable
+has: get
+has: set
+defineProperty: value
+set: value,3
+get: value`
+);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);