Import of the watch repository from Pebble

third_party/jerryscript/tests/jerry/object_freeze.js

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+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var obj = {
+  prop: function() {},
+  foo: 'bar'
+};
+
+// New properties may be added, existing properties may be changed or removed
+obj.foo = 'baz';
+obj.lumpy = 'woof';
+delete obj.prop;
+
+var o = Object.freeze(obj);
+
+assert(Object.isFrozen(obj) === true);
+
+// Now any changes will fail
+obj.foo = 'quux'; // silently does nothing
+assert (obj.foo === 'baz');
+
+obj.quaxxor = 'the friendly duck'; // silently doesn't add the property
+assert (obj.quaxxor === undefined);
+
+// ...and in strict mode such attempts will throw TypeErrors
+function fail(){
+  'use strict';
+
+  try {
+    obj.foo = 'sparky'; // throws a TypeError
+    assert (false);
+  } catch (e) {
+    assert (e instanceof TypeError);
+  }
+
+  try {
+    delete obj.foo; // throws a TypeError
+    assert (false);
+  } catch (e) {
+    assert (e instanceof TypeError);
+  }
+
+  try {
+    obj.sparky = 'arf'; // throws a TypeError
+    assert (false);
+  } catch (e) {
+    assert (e instanceof TypeError);
+  }
+}
+
+fail();
+
+// Attempted changes through Object.defineProperty will also throw
+
+try {
+  Object.defineProperty(obj, 'ohai', { value: 17 }); // throws a TypeError
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}
+
+try {
+  Object.defineProperty(obj, 'foo', { value: 'eit' }); // throws a TypeError
+  assert (false);
+} catch (e) {
+  assert (e instanceof TypeError);
+}