summaryrefslogtreecommitdiffstats
path: root/js/src/tests/ecma_5/Object/extensibility-01.js
diff options
context:
space:
mode:
Diffstat (limited to 'js/src/tests/ecma_5/Object/extensibility-01.js')
-rw-r--r--js/src/tests/ecma_5/Object/extensibility-01.js103
1 files changed, 103 insertions, 0 deletions
diff --git a/js/src/tests/ecma_5/Object/extensibility-01.js b/js/src/tests/ecma_5/Object/extensibility-01.js
new file mode 100644
index 000000000..c001f3825
--- /dev/null
+++ b/js/src/tests/ecma_5/Object/extensibility-01.js
@@ -0,0 +1,103 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ * Jeff Walden <jwalden+code@mit.edu>
+ */
+
+var gTestfile = '15.2.3.10-01.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 492849;
+var summary = 'ES5: Implement Object.preventExtensions, Object.isExtensible';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function trySetProperty(o, p, v, strict)
+{
+ function strictSetProperty()
+ {
+ "use strict";
+ o[p] = v;
+ }
+
+ function setProperty()
+ {
+ o[p] = v;
+ }
+
+ assertEq(Object.prototype.hasOwnProperty.call(o, p), false);
+
+ try
+ {
+ if (strict)
+ strictSetProperty();
+ else
+ setProperty();
+ if (o[p] === v)
+ return "set";
+ if (p in o)
+ return "set-converted";
+ return "swallowed";
+ }
+ catch (e)
+ {
+ return "throw";
+ }
+}
+
+function tryDefineProperty(o, p, v)
+{
+ assertEq(Object.prototype.hasOwnProperty.call(o, p), false);
+
+ try
+ {
+ Object.defineProperty(o, p, { value: v });
+ if (o[p] === v)
+ return "set";
+ if (p in o)
+ return "set-converted";
+ return "swallowed";
+ }
+ catch (e)
+ {
+ return "throw";
+ }
+}
+
+assertEq(typeof Object.preventExtensions, "function");
+assertEq(Object.preventExtensions.length, 1);
+
+var slowArray = [1, 2, 3];
+slowArray.slow = 5;
+var objs =
+ [{}, { 1: 2 }, { a: 3 }, [], [1], [, 1], slowArray, function a(){}, /a/];
+
+for (var i = 0, sz = objs.length; i < sz; i++)
+{
+ var o = objs[i];
+ assertEq(Object.isExtensible(o), true, "object " + i + " not extensible?");
+
+ var o2 = Object.preventExtensions(o);
+ assertEq(o, o2);
+
+ assertEq(Object.isExtensible(o), false, "object " + i + " is extensible?");
+
+ assertEq(trySetProperty(o, "baz", 17, true), "throw",
+ "unexpected behavior for strict-mode property-addition to " +
+ "object " + i);
+ assertEq(trySetProperty(o, "baz", 17, false), "swallowed",
+ "unexpected behavior for property-addition to object " + i);
+
+ assertEq(tryDefineProperty(o, "baz", 17), "throw",
+ "unexpected behavior for new property definition on object " + i);
+}
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("All tests passed!");