1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/isArray/proxy.js b/js/src/tests/test262/built-ins/Array/isArray/proxy.js
new file mode 100644
index 0000000000..fd369e07d1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/isArray/proxy.js
@@ -0,0 +1,32 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.isarray
+es6id: 22.1.2.2
+description: Proxy of an array is treated as an array
+info: |
+  1. Return IsArray(arg).
+
+  7.2.2 IsArray
+
+  [...]
+  3. If argument is a Proxy exotic object, then
+     a. If the value of the [[ProxyHandler]] internal slot of argument is null,
+        throw a TypeError exception.
+     b. Let target be the value of the [[ProxyTarget]] internal slot of
+        argument.
+     c. Return ? IsArray(target).
+features: [Proxy]
+---*/
+
+var objectProxy = new Proxy({}, {});
+var arrayProxy = new Proxy([], {});
+var arrayProxyProxy = new Proxy(arrayProxy, {});
+
+assert.sameValue(Array.isArray(objectProxy), false, 'Array.isArray(new Proxy({}, {})) must return false');
+assert.sameValue(Array.isArray(arrayProxy), true, 'Array.isArray(new Proxy([], {})) must return true');
+assert.sameValue(
+  Array.isArray(arrayProxyProxy), true, 'Array.isArray(new Proxy(arrayProxy, {})) must return true'
+);
+
+reportCompare(0, 0);