1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/block-scope/syntax/for-in/acquire-properties-from-array.js b/js/src/tests/test262/language/block-scope/syntax/for-in/acquire-properties-from-array.js
new file mode 100644
index 0000000000..66a0be39dd
--- /dev/null
+++ b/js/src/tests/test262/language/block-scope/syntax/for-in/acquire-properties-from-array.js
@@ -0,0 +1,43 @@
+// Copyright (C) 2011 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.1
+description: >
+    for-in to acquire properties from array
+---*/
+function props(x) {
+  var array = [];
+  for (let p in x) array.push(p);
+  return array;
+}
+var subject;
+
+subject = props([]);
+assert.sameValue(subject.length, 0, "[]: length");
+assert.sameValue(subject[0], undefined, "[]: first property");
+assert.sameValue(subject[1], undefined, "[]: second property");
+assert.sameValue(subject[2], undefined, "[]: third property");
+assert.sameValue(subject[3], undefined, "[]: fourth property");
+
+subject = props([1]);
+assert.sameValue(subject.length, 1, "[1]: length");
+assert.sameValue(subject[0], "0", "[1]: first property");
+assert.sameValue(subject[1], undefined, "[1]: second property");
+assert.sameValue(subject[2], undefined, "[1]: third property");
+assert.sameValue(subject[3], undefined, "[1]: fourth property");
+
+subject = props([1, 2]);
+assert.sameValue(subject.length, 2, "[1, 2]: length");
+assert.sameValue(subject[0], "0", "[1, 2]: first property");
+assert.sameValue(subject[1], "1", "[1, 2]: second property");
+assert.sameValue(subject[2], undefined, "[1, 2]: third property");
+assert.sameValue(subject[3], undefined, "[1, 2]: fourth property");
+
+subject = props([1, 2, 3]);
+assert.sameValue(subject.length, 3, "[1, 2, 3]: length");
+assert.sameValue(subject[0], "0", "[1, 2, 3]: first property");
+assert.sameValue(subject[1], "1", "[1, 2, 3]: second property");
+assert.sameValue(subject[2], "2", "[1, 2, 3]: third property");
+assert.sameValue(subject[3], undefined, "[1, 2, 3]: fourth property");
+
+reportCompare(0, 0);