249bf75e0c
Both of them shipped in Chrome 49 without incident. Also move relevant tests from harmony/ to es6/. Review URL: https://codereview.chromium.org/1815773002 Cr-Commit-Position: refs/heads/master@{#34964}
506 lines
14 KiB
JavaScript
506 lines
14 KiB
JavaScript
// Copyright 2012 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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///////////////////////////////////////////////////////////////////////////////
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// JSON.stringify
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function testStringify(expected, object) {
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// Test fast case that bails out to slow case.
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assertEquals(expected, JSON.stringify(object));
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// Test slow case.
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assertEquals(expected, JSON.stringify(object, undefined, 0));
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}
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// Test serializing a proxy, a function proxy, and objects that contain them.
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var handler1 = {
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get: function(target, name) {
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return name.toUpperCase();
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},
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ownKeys: function() {
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return ['a', 'b', 'c'];
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},
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getOwnPropertyDescriptor: function() {
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return { enumerable: true, configurable: true };
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}
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}
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var proxy1 = new Proxy({}, handler1);
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testStringify('{"a":"A","b":"B","c":"C"}', proxy1);
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var proxy_fun = new Proxy(() => {}, handler1);
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assertTrue(typeof(proxy_fun) === 'function');
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testStringify(undefined, proxy_fun);
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testStringify('[1,null]', [1, proxy_fun]);
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handler1.apply = function() { return 666; };
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testStringify(undefined, proxy_fun);
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testStringify('[1,null]', [1, proxy_fun]);
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var parent1a = { b: proxy1 };
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testStringify('{"b":{"a":"A","b":"B","c":"C"}}', parent1a);
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var parent1b = { a: 123, b: proxy1, c: true };
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testStringify('{"a":123,"b":{"a":"A","b":"B","c":"C"},"c":true}', parent1b);
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var parent1c = [123, proxy1, true];
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testStringify('[123,{"a":"A","b":"B","c":"C"},true]', parent1c);
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// Proxy with side effect.
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var handler2 = {
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get: function(target, name) {
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delete parent2.c;
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return name.toUpperCase();
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},
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ownKeys: function() {
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return ['a', 'b', 'c'];
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},
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getOwnPropertyDescriptor: function() {
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return { enumerable: true, configurable: true };
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}
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}
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var proxy2 = new Proxy({}, handler2);
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var parent2 = { a: "delete", b: proxy2, c: "remove" };
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var expected2 = '{"a":"delete","b":{"a":"A","b":"B","c":"C"}}';
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assertEquals(expected2, JSON.stringify(parent2));
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parent2.c = "remove"; // Revert side effect.
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assertEquals(expected2, JSON.stringify(parent2, undefined, 0));
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// Proxy with a get function that uses the receiver argument.
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var handler3 = {
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get: function(target, name, receiver) {
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if (name == 'valueOf' || name === Symbol.toPrimitive) {
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return function() { return "proxy" };
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};
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if (typeof name !== 'symbol') return name + "(" + receiver + ")";
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},
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ownKeys: function() {
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return ['a', 'b', 'c'];
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},
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getOwnPropertyDescriptor: function() {
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return { enumerable: true, configurable: true };
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}
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}
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var proxy3 = new Proxy({}, handler3);
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var parent3 = { x: 123, y: proxy3 }
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testStringify('{"x":123,"y":{"a":"a(proxy)","b":"b(proxy)","c":"c(proxy)"}}',
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parent3);
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// Empty proxy.
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var handler4 = {
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get: function(target, name) {
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return 0;
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},
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has: function() {
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return true;
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},
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getOwnPropertyDescriptor: function(target, name) {
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return { enumerable: false };
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}
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}
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var proxy4 = new Proxy({}, handler4);
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testStringify('{}', proxy4);
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testStringify('{"a":{}}', { a: proxy4 });
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// Proxy that provides a toJSON function that uses this.
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var handler5 = {
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get: function(target, name) {
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if (name == 'z') return 97000;
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return function(key) { return key.charCodeAt(0) + this.z; };
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},
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ownKeys: function(target) {
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return ['toJSON', 'z'];
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},
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has: function() {
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return true;
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},
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getOwnPropertyDescriptor: function(target, name) {
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return { enumerable: true };
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}
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}
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var proxy5 = new Proxy({}, handler5);
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testStringify('{"a":97097}', { a: proxy5 });
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// Proxy that provides a toJSON function that returns undefined.
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var handler6 = {
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get: function(target, name) {
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return function(key) { return undefined; };
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},
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ownKeys: function(target) {
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return ['toJSON'];
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},
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has: function() {
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return true;
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},
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getOwnPropertyDescriptor: function(target, name) {
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return { enumerable: true };
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}
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}
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var proxy6 = new Proxy({}, handler6);
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testStringify('[1,null,true]', [1, proxy6, true]);
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testStringify('{"a":1,"c":true}', {a: 1, b: proxy6, c: true});
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// Object containing a proxy that changes the parent's properties.
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var handler7 = {
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get: function(target, name) {
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delete parent7.a;
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delete parent7.c;
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parent7.e = "5";
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return name.toUpperCase();
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},
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ownKeys: function() {
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return ['a', 'b', 'c'];
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},
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getOwnPropertyDescriptor: function() {
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return { enumerable: true, configurable: true };
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}
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}
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var proxy7 = new Proxy({}, handler7);
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var parent7 = { a: "1", b: proxy7, c: "3", d: "4" };
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assertEquals('{"a":"1","b":{"a":"A","b":"B","c":"C"},"d":"4"}',
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JSON.stringify(parent7));
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assertEquals('{"b":{"a":"A","b":"B","c":"C"},"d":"4","e":"5"}',
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JSON.stringify(parent7));
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// (Proxy handler to log trap calls)
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var log = [];
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var logger = {};
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var handler = new Proxy({}, logger);
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logger.get = function(t, trap, r) {
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return function() {
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log.push([trap, ...arguments]);
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return Reflect[trap](...arguments);
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}
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};
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// Object is a callable proxy
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log.length = 0;
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var target = () => 42;
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var proxy = new Proxy(target, handler);
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assertTrue(typeof proxy === 'function');
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assertEquals(undefined, JSON.stringify(proxy));
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assertEquals(1, log.length)
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "toJSON", proxy], log[0]);
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// Object is a non-callable non-arraylike proxy
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log.length = 0;
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var target = {foo: 42}
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var proxy = new Proxy(target, handler);
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assertFalse(Array.isArray(proxy));
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assertEquals('{"foo":42}', JSON.stringify(proxy));
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assertEquals(4, log.length)
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(
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["get", target, "toJSON", proxy], log[0]);
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assertEquals(
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["ownKeys", target], log[1]); // EnumerableOwnNames
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assertEquals(
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["getOwnPropertyDescriptor", target, "foo"], log[2]); // EnumerableOwnNames
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assertEquals(
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["get", target, "foo", proxy], log[3]);
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// Object is an arraylike proxy
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log.length = 0;
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var target = [42];
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var proxy = new Proxy(target, handler);
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assertTrue(Array.isArray(proxy));
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assertEquals('[42]', JSON.stringify(proxy));
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assertEquals(3, log.length)
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "toJSON", proxy], log[0]);
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assertEquals(["get", target, "length", proxy], log[1]);
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assertEquals(["get", target, "0", proxy], log[2]);
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// Replacer is a callable proxy
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log.length = 0;
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var object = {0: "foo", 1: 666};
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var target = (key, val) => key == "1" ? val + 42 : val;
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var proxy = new Proxy(target, handler);
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assertTrue(typeof proxy === 'function');
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assertEquals('{"0":"foo","1":708}', JSON.stringify(object, proxy));
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assertEquals(3, log.length)
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(4, log[0].length)
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assertEquals("apply", log[0][0]);
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assertEquals("", log[0][3][0]);
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assertEquals({0: "foo", 1: 666}, log[0][3][1]);
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assertEquals(4, log[1].length)
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assertEquals("apply", log[1][0]);
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assertEquals(["0", "foo"], log[1][3]);
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assertEquals(4, log[2].length)
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assertEquals("apply", log[2][0]);
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assertEquals(["1", 666], log[2][3]);
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// Replacer is an arraylike proxy
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log.length = 0;
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var object = {0: "foo", 1: 666};
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var target = [0];
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var proxy = new Proxy(target, handler);
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assertTrue(Array.isArray(proxy));
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assertEquals('{"0":"foo"}', JSON.stringify(object, proxy));
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assertEquals(2, log.length)
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "length", proxy], log[0]);
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assertEquals(["get", target, "0", proxy], log[1]);
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// Replacer is an arraylike proxy and object is an array
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log.length = 0;
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var object = ["foo", 42];
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var target = [0];
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var proxy = new Proxy(target, handler);
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assertTrue(Array.isArray(proxy));
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assertEquals('["foo",42]', JSON.stringify(object, proxy));
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assertEquals(2, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "length", proxy], log[0]);
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assertEquals(["get", target, "0", proxy], log[1]);
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// Replacer is an arraylike proxy with a non-trivial length
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var getTrap = function(t, key) {
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if (key === "length") return {[Symbol.toPrimitive]() {return 42}};
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if (key === "41") return "foo";
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if (key === "42") return "bar";
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};
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var target = [];
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var proxy = new Proxy(target, {get: getTrap});
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assertTrue(Array.isArray(proxy));
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var object = {foo: true, bar: 666};
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assertEquals('{"foo":true}', JSON.stringify(object, proxy));
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// Replacer is an arraylike proxy with a bogus length
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var getTrap = function(t, key) {
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if (key === "length") return Symbol();
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if (key === "41") return "foo";
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if (key === "42") return "bar";
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};
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var target = [];
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var proxy = new Proxy(target, {get: getTrap});
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assertTrue(Array.isArray(proxy));
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var object = {foo: true, bar: 666};
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assertThrows(() => JSON.stringify(object, proxy), TypeError);
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// Replacer returns a non-callable non-arraylike proxy
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log.length = 0;
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var object = ["foo", 42];
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var target = {baz: 5};
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var proxy = new Proxy(target, handler);
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var replacer = (key, val) => key === "1" ? proxy : val;
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assertEquals('["foo",{"baz":5}]', JSON.stringify(object, replacer));
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assertEquals(3, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["ownKeys", target], log[0]);
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assertEquals(["getOwnPropertyDescriptor", target, "baz"], log[1]);
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// Replacer returns an arraylike proxy
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log.length = 0;
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var object = ["foo", 42];
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var target = ["bar"];
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var proxy = new Proxy(target, handler);
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var replacer = (key, val) => key === "1" ? proxy : val;
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assertEquals('["foo",["bar"]]', JSON.stringify(object, replacer));
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assertEquals(2, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "length", proxy], log[0]);
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assertEquals(["get", target, "0", proxy], log[1]);
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// Replacer returns an arraylike proxy with a non-trivial length
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var getTrap = function(t, key) {
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if (key === "length") return {[Symbol.toPrimitive]() {return 3}};
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if (key === "2") return "baz";
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if (key === "3") return "bar";
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};
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var target = [];
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var proxy = new Proxy(target, {get: getTrap});
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var replacer = (key, val) => key === "goo" ? proxy : val;
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var object = {foo: true, goo: false};
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assertEquals('{"foo":true,"goo":[null,null,"baz"]}',
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JSON.stringify(object, replacer));
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// Replacer returns an arraylike proxy with a bogus length
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var getTrap = function(t, key) {
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if (key === "length") return Symbol();
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if (key === "2") return "baz";
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if (key === "3") return "bar";
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};
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var target = [];
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var proxy = new Proxy(target, {get: getTrap});
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var replacer = (key, val) => key === "goo" ? proxy : val;
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var object = {foo: true, goo: false};
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assertThrows(() => JSON.stringify(object, replacer), TypeError);
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// Replacer returns a callable proxy
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log.length = 0;
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var target = () => 666;
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var proxy = new Proxy(target, handler);
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var replacer = (key, val) => key === "1" ? proxy : val;
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assertEquals('["foo",null]', JSON.stringify(["foo", 42], replacer));
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assertEquals(0, log.length);
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assertEquals('{"0":"foo"}', JSON.stringify({0: "foo", 1: 42}, replacer));
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assertEquals(0, log.length);
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///////////////////////////////////////////////////////////////////////////////
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// JSON.parse
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// Reviver is a callable proxy
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log.length = 0;
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var target = () => 42;
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var proxy = new Proxy(target, handler);
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assertTrue(typeof proxy === "function");
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assertEquals(42, JSON.parse("[true, false]", proxy));
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assertEquals(3, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(4, log[0].length);
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assertEquals("apply", log[0][0]);
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assertEquals(["0", true], log[0][3]);
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assertEquals(4, log[1].length);
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assertEquals("apply", log[1][0]);
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assertEquals(["1", false], log[1][3]);
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assertEquals(4, log[2].length);
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assertEquals("apply", log[2][0]);
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assertEquals(["", [42, 42]], log[2][3]);
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// Reviver plants a non-arraylike proxy into a yet-to-be-visited property
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log.length = 0;
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var target = {baz: 42};
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var proxy = new Proxy(target, handler);
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var reviver = function(p, v) {
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if (p === "baz") return 5;
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if (p === "foo") this.bar = proxy;
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return v;
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}
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assertEquals({foo: 0, bar: proxy}, JSON.parse('{"foo":0,"bar":1}', reviver));
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assertEquals(4, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["ownKeys", target], log[0]);
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assertEquals(["getOwnPropertyDescriptor", target, "baz"], log[1]);
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assertEquals(["get", target, "baz", proxy], log[2]);
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assertEquals(["defineProperty", target, "baz",
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{value: 5, configurable: true, writable: true, enumerable: true}], log[3]);
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// Reviver plants an arraylike proxy into a yet-to-be-visited property
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log.length = 0;
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var target = [42];
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var proxy = new Proxy(target, handler);
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assertTrue(Array.isArray(proxy));
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var reviver = function(p, v) {
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if (p === "0") return undefined;
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if (p === "foo") this.bar = proxy;
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return v;
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}
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var result = JSON.parse('{"foo":0,"bar":1}', reviver);
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assertEquals({foo: 0, bar: proxy}, result);
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assertSame(result.bar, proxy);
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assertEquals(3, log.length);
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for (var i in log) assertSame(target, log[i][1]);
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assertEquals(["get", target, "length", proxy], log[0]);
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assertEquals(["get", target, "0", proxy], log[1]);
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assertEquals(["deleteProperty", target, "0"], log[2]);
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