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
195 lines
6.1 KiB
JavaScript
195 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.seal and Object.isSealed 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.seal(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.seal 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.isSealed(non_objects[key]);
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} catch(e) {
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exception = true;
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assertTrue(/Object.isSealed 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.isSealed(obj));
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Object.seal(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.isSealed(obj));
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// We should not be frozen, since we are still able to
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// update values.
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assertFalse(Object.isFrozen(obj));
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// We should not allow new properties to be added.
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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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assertTrue(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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assertTrue(desc.writable);
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assertFalse(desc.configurable);
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assertEquals("foobar", desc.value);
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// Since writable is not affected by seal we should still be able to
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// update the values.
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obj.x = "43";
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assertEquals("43", 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.isSealed(obj2));
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Object.seal(obj2);
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// Since this is an accessor property the object is now effectively both
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// sealed and frozen (accessors has no writable attribute).
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assertTrue(Object.isFrozen(obj2));
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assertFalse(Object.isExtensible(obj2));
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assertTrue(Object.isSealed(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 seal 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.isSealed(arr));
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Object.seal(arr);
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assertTrue(Object.isSealed(arr));
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assertFalse(Object.isExtensible(arr));
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// Since the values in the array is still writable this object
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// is not frozen.
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assertFalse(Object.isFrozen(arr));
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desc = Object.getOwnPropertyDescriptor(arr, '0');
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assertFalse(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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assertFalse(desc.configurable);
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assertTrue(desc.writable);
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assertEquals(43, desc.value);
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arr[0] = 'foo';
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// We should be able to overwrite the existing value.
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assertEquals('foo', arr[0]);
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// Test that isSealed returns the correct value even if configurable
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// has been set to false on all properties manually and the extensible
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// flag has also been set 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: true});
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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.isSealed(obj3));
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// Make sure that an object that has a configurable property
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// is not classified as sealed.
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var obj4 = {};
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Object.defineProperty(obj4, 'x', {configurable: true, writable: false});
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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.isSealed(obj4));
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// Make sure that Object.seal returns the sealed object.
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var obj4 = {};
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assertTrue(obj4 === Object.seal(obj4));
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