1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/iterator-helpers-from-other-global.js b/js/src/tests/non262/Iterator/prototype/iterator-helpers-from-other-global.js
new file mode 100644
index 0000000000..d18bd8f00f
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/iterator-helpers-from-other-global.js
@@ -0,0 +1,64 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+class TestError extends Error {}
+
+class TestIterator extends Iterator {
+  next() {
+    return {done: false, value: 'value'};
+  }
+
+  closed = false;
+  return(value) {
+    this.closed = true;
+    return {done: true, value};
+  }
+}
+
+function checkIterResult({done, value}, expectedDone, expectedValue) {
+  assertEq(done, expectedDone);
+  assertEq(Array.isArray(value) ? value[1] : value, expectedValue);
+}
+
+const otherGlobal = newGlobal({newCompartment: true});
+
+const methods = [
+  ["map", x => x],
+  ["filter", x => true],
+  ["take", Infinity],
+  ["drop", 0],
+  ["asIndexedPairs", undefined],
+  ["flatMap", x => [x]],
+];
+
+for (const [method, arg] of methods) {
+  const {next: otherNext} = Object.getPrototypeOf(
+    new otherGlobal.Array().values()[method](arg)
+  );
+  const iterator = new TestIterator();
+  const helper = iterator[method](arg);
+  checkIterResult(otherNext.call(helper), false, 'value');
+}
+
+for (const [method, arg] of methods) {
+  const {return: otherReturn} = Object.getPrototypeOf(
+    new otherGlobal.Array().values()[method](arg)
+  );
+  const iterator = new TestIterator();
+  const helper = iterator[method](arg);
+  assertEq(iterator.closed, false);
+  checkIterResult(otherReturn.call(helper), true, undefined);
+  assertEq(iterator.closed, true);
+}
+
+for (const [method, arg] of methods) {
+  const {throw: otherThrow} = Object.getPrototypeOf(
+    new otherGlobal.Array().values()[method](arg)
+  );
+  const iterator = new TestIterator();
+  const helper = iterator[method](arg);
+  assertThrowsInstanceOf(otherThrow.bind(helper, new TestError()), TestError);
+  checkIterResult(helper.next(), true, undefined);
+}
+
+if (typeof reportCompare === 'function')
+  reportCompare(0, 0);