1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/JSON/stringify/value-array-proxy.js b/js/src/tests/test262/built-ins/JSON/stringify/value-array-proxy.js
new file mode 100644
index 0000000000..2cea3b4ebb
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+++ b/js/src/tests/test262/built-ins/JSON/stringify/value-array-proxy.js
@@ -0,0 +1,51 @@
+// 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-serializejsonarray
+description: >
+  Proxy of an array is treated as an array.
+info: |
+  JSON.stringify ( value [ , replacer [ , space ] ] )
+
+  [...]
+  12. Return ? SerializeJSONProperty(the empty String, wrapper).
+
+  SerializeJSONProperty ( key, holder )
+
+  [...]
+  10. If Type(value) is Object and IsCallable(value) is false, then
+    a. Let isArray be ? IsArray(value).
+    b. If isArray is true, return ? SerializeJSONArray(value).
+
+  SerializeJSONArray ( value )
+
+  [...]
+  6. Let len be ? LengthOfArrayLike(value).
+  7. Let index be 0.
+  8. Repeat, while index < len
+    a. Let strP be ? SerializeJSONProperty(! ToString(index), value).
+features: [Proxy]
+---*/
+
+var arrayProxy = new Proxy([], {
+  get: function(_target, key) {
+    if (key === 'length') return 2;
+    return Number(key);
+  },
+});
+
+assert.sameValue(
+  JSON.stringify(arrayProxy), '[0,1]', 'proxy for an array'
+);
+assert.sameValue(
+  JSON.stringify([[arrayProxy]]), '[[[0,1]]]', 'proxy for an array (nested)'
+);
+
+var arrayProxyProxy = new Proxy(arrayProxy, {});
+assert.sameValue(
+  JSON.stringify([[arrayProxyProxy]]),
+  '[[[0,1]]]',
+  'proxy for a proxy for an array (nested)'
+);
+
+reportCompare(0, 0);