a01b45df58
Our testing infrastructure uses exceptions to indicate
errors. assertUnreachable therefore throws an exception to indicate
that it was reached. Therefore, it cannot be used to check that an
exception was thrown using the pattern:
try {
shouldThrow();
assertUnreachable();
} catch(e) {
}
Such a test will always pass because assertUnreachable will throw an
exception if shouldThrow does not.
R=ricow@chromium.org
Review URL: http://codereview.chromium.org/7053035
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
194 lines
6.1 KiB
JavaScript
194 lines
6.1 KiB
JavaScript
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Tests the Object.freeze and Object.isFrozen methods - ES 15.2.3.9 and
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// ES 15.2.3.12
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// Test that we throw an error if an object is not passed as argument.
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var non_objects = new Array(undefined, null, 1, -1, 0, 42.43);
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for (var key in non_objects) {
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var exception = false;
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try {
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Object.freeze(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.freeze called on non-object/.test(e));
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}
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assertTrue(exception);
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}
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for (var key in non_objects) {
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exception = false;
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try {
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Object.isFrozen(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.isFrozen called on non-object/.test(e));
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}
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assertTrue(exception);
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}
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// Test normal data properties.
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var obj = { x: 42, z: 'foobar' };
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var desc = Object.getOwnPropertyDescriptor(obj, 'x');
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assertTrue(desc.writable);
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assertTrue(desc.configurable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(obj, 'z');
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assertTrue(desc.writable);
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assertTrue(desc.configurable);
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assertEquals('foobar', desc.value);
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assertTrue(Object.isExtensible(obj));
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assertFalse(Object.isFrozen(obj));
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Object.freeze(obj);
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// Make sure we are no longer extensible.
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assertFalse(Object.isExtensible(obj));
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assertTrue(Object.isFrozen(obj));
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obj.foo = 42;
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assertEquals(obj.foo, undefined);
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desc = Object.getOwnPropertyDescriptor(obj, 'x');
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assertFalse(desc.writable);
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assertFalse(desc.configurable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(obj, 'z');
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assertFalse(desc.writable);
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assertFalse(desc.configurable);
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assertEquals("foobar", desc.value);
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// Make sure that even if we try overwrite a value that is not writable, it is
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// not changed.
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obj.x = "tete";
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assertEquals(42, obj.x);
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obj.x = { get: function() {return 43}, set: function() {} };
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assertEquals(42, obj.x);
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// Test on accessors.
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var obj2 = {};
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function get() { return 43; };
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function set() {};
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Object.defineProperty(obj2, 'x', { get: get, set: set, configurable: true });
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desc = Object.getOwnPropertyDescriptor(obj2, 'x');
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assertTrue(desc.configurable);
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assertEquals(undefined, desc.value);
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assertEquals(set, desc.set);
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assertEquals(get, desc.get);
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assertTrue(Object.isExtensible(obj2));
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assertFalse(Object.isFrozen(obj2));
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Object.freeze(obj2);
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assertTrue(Object.isFrozen(obj2));
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assertFalse(Object.isExtensible(obj2));
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desc = Object.getOwnPropertyDescriptor(obj2, 'x');
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assertFalse(desc.configurable);
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assertEquals(undefined, desc.value);
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assertEquals(set, desc.set);
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assertEquals(get, desc.get);
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obj2.foo = 42;
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assertEquals(obj2.foo, undefined);
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// Test freeze on arrays.
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var arr = new Array(42,43);
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desc = Object.getOwnPropertyDescriptor(arr, '0');
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assertTrue(desc.configurable);
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assertTrue(desc.writable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(arr, '1');
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assertTrue(desc.configurable);
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assertTrue(desc.writable);
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assertEquals(43, desc.value);
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assertTrue(Object.isExtensible(arr));
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assertFalse(Object.isFrozen(arr));
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Object.freeze(arr);
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assertTrue(Object.isFrozen(arr));
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assertFalse(Object.isExtensible(arr));
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desc = Object.getOwnPropertyDescriptor(arr, '0');
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assertFalse(desc.configurable);
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assertFalse(desc.writable);
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assertEquals(42, desc.value);
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desc = Object.getOwnPropertyDescriptor(arr, '1');
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assertFalse(desc.configurable);
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assertFalse(desc.writable);
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assertEquals(43, desc.value);
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arr[0] = 'foo';
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assertEquals(arr[0], 42);
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// Test that isFrozen return the correct value even if configurable has been set
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// to false on all properties manually and the extensible flag has also been set
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// to false manually.
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var obj3 = { x: 42, y: 'foo' };
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assertFalse(Object.isFrozen(obj3));
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Object.defineProperty(obj3, 'x', {configurable: false, writable: false});
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Object.defineProperty(obj3, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj3);
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assertTrue(Object.isFrozen(obj3));
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// Make sure that an object that has only non-configurable, but one
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// writable property, is not classified as frozen.
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var obj4 = {};
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Object.defineProperty(obj4, 'x', {configurable: false, writable: true});
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Object.defineProperty(obj4, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj4);
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assertFalse(Object.isFrozen(obj4));
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// Make sure that an object that has only non-writable, but one
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// configurable property, is not classified as frozen.
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var obj5 = {};
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Object.defineProperty(obj5, 'x', {configurable: true, writable: false});
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Object.defineProperty(obj5, 'y', {configurable: false, writable: false});
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Object.preventExtensions(obj5);
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assertFalse(Object.isFrozen(obj5));
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// Make sure that Object.freeze returns the frozen object.
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var obj6 = {}
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assertTrue(obj6 === Object.freeze(obj6))
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