1 files changed, 129 insertions, 0 deletions
diff --git a/js/src/tests/js1_8_5/extensions/clone-object.js b/js/src/tests/js1_8_5/extensions/clone-object.js
new file mode 100644
index 000000000..29a38217a
--- /dev/null
+++ b/js/src/tests/js1_8_5/extensions/clone-object.js
@@ -0,0 +1,129 @@
+// |reftest| skip-if(!xulRuntime.shell)
+// -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+function test() {
+    var check = clone_object_check;
+
+    check({});
+    check([]);
+    check({x: 0});
+    check({x: 0.7, p: "forty-two", y: null, z: undefined});
+    check(Array.prototype);
+    check(Object.prototype);
+
+    // before and after
+    var b, a;
+
+    // Slow array.
+    b = [, 1, 2, 3];
+    b.expando = true;
+    b[5] = 5;
+    b[0] = 0;
+    b[4] = 4;
+    delete b[2];
+    check(b);
+
+    // Check cloning properties other than basic data properties. (check()
+    // asserts that the properties of the clone are configurable, writable,
+    // enumerable data properties.)
+    b = {};
+    Object.defineProperties(b, {
+        x: {enumerable: true, get: function () { return 12479; }},
+        y: {enumerable: true, configurable: true, writable: false, value: 0},
+        z: {enumerable: true, configurable: false, writable: true, value: 0},
+        hidden: {enumerable:false, value: 1334}});
+    check(b);
+
+    // Check corner cases involving property names.
+    b = {"-1": -1,
+         0xffffffff: null,
+         0x100000000: null,
+         "": 0,
+         "\xff\x7f\u7fff\uffff\ufeff\ufffe": 1, // random unicode id
+         "\ud800 \udbff \udc00 \udfff": 2}; // busted surrogate pairs
+    check(b);
+
+    b = [];
+    b[-1] = -1;
+    b[0xffffffff] = null;
+    b[0x100000000] = null;
+    b[""] = 0;
+    b["\xff\x7f\u7fff\uffff\ufeff\ufffe"] = 1;
+    b["\ud800 \udbff \udc00 \udfff"] = 2;
+    check(b);
+
+    // An array's .length property is not enumerable, so it is not cloned.
+    b = Array(5);
+    assertEq(b.length, 5);
+    a = check(b);
+    assertEq(a.length, 0);
+
+    b[1] = "ok";
+    a = check(b);
+    assertEq(a.length, 2);
+
+    // Check that prototypes are not cloned, per spec.
+    b = Object.create({x:1});
+    b.y = 2;
+    b.z = 3;
+    check(b);
+
+    // Check that cloning does not separate merge points in the tree.
+    var same = {};
+    b = {one: same, two: same};
+    a = check(b);
+    assertEq(a.one === a.two, true);
+
+    b = [same, same];
+    a = check(b);
+    assertEq(a[0] === a[1], true);
+
+    /*
+      XXX TODO spin this out into its own test
+    // This fails quickly with an OOM error. An exception would be nicer.
+    function Infinitree() {
+        return { get left() { return new Infinitree; },
+                 get right() { return new Infinitree; }};
+    }
+    var threw = false;
+    try {
+        serialize(new Infinitree);
+    } catch (exc) {
+        threw = true;
+    }
+    assertEq(threw, true);
+    */
+
+    // Clone an array with holes.
+    check([0, 1, 2, , 4, 5, 6]);
+
+    // Array holes should not take up space.
+    b = [];
+    b[255] = 1;
+    check(b);
+    assertEq(serialize(b).clonebuffer.length < 255, true);
+
+    // Self-modifying object.
+    // This should never read through to b's prototype.
+    b = Object.create({y: 2}, 
+                      {x: {enumerable: true,
+                           configurable: true,
+                           get: function() { if (this.hasOwnProperty("y")) delete this.y; return 1; }},
+                       y: {enumerable: true,
+                           configurable: true,
+                           writable: true,
+                           value: 3}});
+    check(b, "selfModifyingObject");
+
+    // Ignore properties with object-ids.
+    var uri = "http://example.net";
+    b = {x: 1, y: 2};
+    Object.defineProperty(b, Array(uri, "x"), {enumerable: true, value: 3});
+    Object.defineProperty(b, Array(uri, "y"), {enumerable: true, value: 5});
+    check(b);
+}
+
+test();
+reportCompare(0, 0, 'ok');