1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Iterator/prototype/map/returned-iterator-yields-mapper-return-values.js b/js/src/tests/test262/built-ins/Iterator/prototype/map/returned-iterator-yields-mapper-return-values.js
new file mode 100644
index 0000000000..f999fd80a0
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Iterator/prototype/map/returned-iterator-yields-mapper-return-values.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) 2023 Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-iteratorprototype.map
+description: >
+  The values returned by the mapper are the values that are yielded by the iterator returned by map
+info: |
+  %Iterator.prototype%.map ( mapper )
+
+  5.b.vi. Let completion be Completion(Yield(mapped)).
+
+includes: [compareArray.js]
+features: [iterator-helpers]
+flags: []
+---*/
+function* g() {
+  for (let i = 0; i < 5; ++i) {
+    yield i;
+  }
+}
+
+assert.compareArray(Array.from(g()), [0, 1, 2, 3, 4]);
+assert.compareArray(Array.from(g().map(x => x)), [0, 1, 2, 3, 4]);
+assert.compareArray(Array.from(g().map(() => 0)), [0, 0, 0, 0, 0]);
+assert.compareArray(
+  Array.from(
+    g()
+      .map(() => 0)
+      .map((v, c) => c)
+  ),
+  [0, 1, 2, 3, 4]
+);
+assert.compareArray(Array.from(g().map(x => x * 2)), [0, 2, 4, 6, 8]);
+
+let obj = {};
+assert.compareArray(Array.from(g().map(() => obj)), [obj, obj, obj, obj, obj]);
+
+reportCompare(0, 0);