1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-eagerly-on-non-iterator.js b/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-eagerly-on-non-iterator.js
new file mode 100644
index 0000000000..dad38237f1
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/lazy-methods-throw-eagerly-on-non-iterator.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+//
+//
+/*---
+esid: pending
+description: Lazy %Iterator.prototype% methods throw eagerly when called on non-iterators.
+info: >
+  Iterator Helpers proposal 1.1.1
+features: [iterator-helpers]
+---*/
+
+const methods = [
+  iter => Iterator.prototype.map.bind(iter, x => x),
+  iter => Iterator.prototype.filter.bind(iter, x => x),
+  iter => Iterator.prototype.take.bind(iter, 1),
+  iter => Iterator.prototype.drop.bind(iter, 0),
+  iter => Iterator.prototype.asIndexedPairs.bind(iter),
+  iter => Iterator.prototype.flatMap.bind(iter, x => [x]),
+];
+
+for (const method of methods) {
+  assertThrowsInstanceOf(method(undefined), TypeError);
+  assertThrowsInstanceOf(method(null), TypeError);
+  assertThrowsInstanceOf(method(0), TypeError);
+  assertThrowsInstanceOf(method(false), TypeError);
+  assertThrowsInstanceOf(method(''), TypeError);
+  assertThrowsInstanceOf(method(Symbol('')), TypeError);
+  assertThrowsInstanceOf(method({}), TypeError);
+  assertThrowsInstanceOf(method([]), TypeError);
+}
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);