1 files changed, 124 insertions, 0 deletions
diff --git a/js/src/tests/ecma_5/Object/mutation-prevention-methods.js b/js/src/tests/ecma_5/Object/mutation-prevention-methods.js
new file mode 100644
index 000000000..01b4c19cb
--- /dev/null
+++ b/js/src/tests/ecma_5/Object/mutation-prevention-methods.js
@@ -0,0 +1,124 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+var gTestfile = 'mutation-prevention-methods.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 492849;
+var summary = 'Object.is{Sealed,Frozen}, Object.{seal,freeze}';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+// Empty object
+
+var o1 = {};
+
+assertEq(Object.isExtensible(o1), true);
+assertEq(Object.isSealed(o1), false);
+assertEq(Object.isFrozen(o1), false);
+
+Object.preventExtensions(o1);
+
+// An non-extensible empty object has no properties, so it is vacuously sealed
+// and frozen.
+assertEq(Object.isExtensible(o1), false);
+assertEq(Object.isSealed(o1), true);
+assertEq(Object.isFrozen(o1), true);
+
+
+// Object with a data property
+
+var o2 = { 1: 2 };
+
+assertEq(Object.isExtensible(o2), true);
+assertEq(Object.isSealed(o2), false);
+assertEq(Object.isFrozen(o2), false);
+
+Object.preventExtensions(o2);
+
+assertEq(Object.isExtensible(o2), false);
+assertEq(Object.isSealed(o2), false);
+assertEq(Object.isFrozen(o2), false);
+
+Object.seal(o2);
+
+assertEq(Object.isExtensible(o2), false);
+assertEq(Object.isSealed(o2), true);
+assertEq(Object.isFrozen(o2), false);
+
+assertEq(o2[1], 2);
+
+var desc;
+
+desc = Object.getOwnPropertyDescriptor(o2, "1");
+assertEq(typeof desc, "object");
+assertEq(desc.enumerable, true);
+assertEq(desc.configurable, false);
+assertEq(desc.value, 2);
+assertEq(desc.writable, true);
+
+o2[1] = 17;
+
+assertEq(o2[1], 17);
+
+desc = Object.getOwnPropertyDescriptor(o2, "1");
+assertEq(typeof desc, "object");
+assertEq(desc.enumerable, true);
+assertEq(desc.configurable, false);
+assertEq(desc.value, 17);
+assertEq(desc.writable, true);
+
+Object.freeze(o2);
+
+assertEq(o2[1], 17);
+
+desc = Object.getOwnPropertyDescriptor(o2, "1");
+assertEq(typeof desc, "object");
+assertEq(desc.enumerable, true);
+assertEq(desc.configurable, false);
+assertEq(desc.value, 17);
+assertEq(desc.writable, false);
+
+
+// Object with an accessor property
+
+var o3 = { get foo() { return 17; } };
+
+assertEq(Object.isExtensible(o3), true);
+assertEq(Object.isSealed(o3), false);
+assertEq(Object.isFrozen(o3), false);
+
+Object.preventExtensions(o3);
+
+assertEq(Object.isExtensible(o3), false);
+assertEq(Object.isSealed(o3), false);
+assertEq(Object.isFrozen(o3), false);
+
+Object.seal(o3);
+
+// An accessor property in a sealed object is unchanged if that object is
+// frozen, so a sealed object containing only accessor properties is also
+// vacuously frozen.
+assertEq(Object.isExtensible(o3), false);
+assertEq(Object.isSealed(o3), true);
+assertEq(Object.isFrozen(o3), true);
+
+Object.freeze(o3);
+
+assertEq(Object.isExtensible(o3), false);
+assertEq(Object.isSealed(o3), true);
+assertEq(Object.isFrozen(o3), true);
+
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("All tests passed!");