1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-value-throws.js b/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-value-throws.js
new file mode 100644
index 0000000000..3b2f26b401
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/flatMap/close-iterator-when-inner-value-throws.js
@@ -0,0 +1,52 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+//
+//
+/*---
+esid: pending
+description: %Iterator.prototype%.flatMap closes the iterator when innerValue throws.
+info: >
+  Iterator Helpers proposal 2.1.5.7
+  1. Repeat,
+    ...
+    i. Repeat, while innerAlive is true,
+      ...
+      vi. Else,
+        1. Let innerValue be IteratorValue(innerNext).
+        2. IfAbruptCloseIterator(innerValue, iterated).
+features: [iterator-helpers]
+---*/
+
+class TestIterator extends Iterator {
+  next() {
+    return {done: false, value: 0};
+  }
+
+  closed = false;
+  return() {
+    this.closed = true;
+    return {done: true};
+  }
+}
+
+class TestError extends Error {}
+class InnerIterator extends Iterator {
+  next() {
+    return {
+      done: false,
+      get value() {
+        throw new TestError();
+      },
+    };
+  }
+}
+
+const iter = new TestIterator();
+const mapped = iter.flatMap(x => new InnerIterator());
+
+assertEq(iter.closed, false);
+assertThrowsInstanceOf(() => mapped.next(), TestError);
+assertEq(iter.closed, true);
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);