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Edit File: proxies-for.js
// Copyright 2011 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --harmony-proxies // Helper. function TestWithProxies(test, x, y, z) { test(Proxy.create, x, y, z) test(function(h) {return Proxy.createFunction(h, function() {})}, x, y, z) } // Iterate over a proxy. function TestForIn(properties, handler) { TestWithProxies(TestForIn2, properties, handler) } function TestForIn2(create, properties, handler) { var p = create(handler) var found = [] for (var x in p) found.push(x) assertArrayEquals(properties, found) } TestForIn(["0", "a"], { enumerate: function() { return [0, "a"] } }) TestForIn(["null", "a"], { enumerate: function() { return this.enumerate2() }, enumerate2: function() { return [null, "a"] } }) TestForIn(["b", "d"], { getPropertyNames: function() { return ["a", "b", "c", "d", "e"] }, getPropertyDescriptor: function(k) { switch (k) { case "a": return {enumerable: false, value: "3"}; case "b": return {enumerable: true, get get() {}}; case "c": return {value: 4}; case "d": return {get enumerable() { return true }}; default: return undefined; } } }) TestForIn(["b", "a", "0", "c"], Proxy.create({ get: function(pr, pk) { return function() { return ["b", "a", 0, "c"] } } })) // Iterate over an object with a proxy prototype. function TestForInDerived(properties, handler) { TestWithProxies(TestForInDerived2, properties, handler) } function TestForInDerived2(create, properties, handler) { var p = create(handler) var o = Object.create(p) o.z = 0 var found = [] for (var x in o) found.push(x) assertArrayEquals(["z"].concat(properties), found) var oo = Object.create(o) oo.y = 0 var found = [] for (var x in oo) found.push(x) assertArrayEquals(["y", "z"].concat(properties), found) } TestForInDerived(["0", "a"], { enumerate: function() { return [0, "a"] }, getPropertyDescriptor: function(k) { return k == "0" || k == "a" ? {} : undefined } }) TestForInDerived(["null", "a"], { enumerate: function() { return this.enumerate2() }, enumerate2: function() { return [null, "a"] }, getPropertyDescriptor: function(k) { return k == "null" || k == "a" ? {} : undefined } }) TestForInDerived(["b", "d"], { getPropertyNames: function() { return ["a", "b", "c", "d", "e"] }, getPropertyDescriptor: function(k) { switch (k) { case "a": return {enumerable: false, value: "3"}; case "b": return {enumerable: true, get get() {}}; case "c": return {value: 4}; case "d": return {get enumerable() { return true }}; default: return undefined; } } }) // Throw exception in enumerate trap. function TestForInThrow(handler) { TestWithProxies(TestForInThrow2, handler) } function TestForInThrow2(create, handler) { var p = create(handler) var o = Object.create(p) assertThrows(function(){ for (var x in p) {} }, "myexn") assertThrows(function(){ for (var x in o) {} }, "myexn") } TestForInThrow({ enumerate: function() { throw "myexn" } }) TestForInThrow({ enumerate: function() { return this.enumerate2() }, enumerate2: function() { throw "myexn" } }) TestForInThrow({ getPropertyNames: function() { throw "myexn" } }) TestForInThrow({ getPropertyNames: function() { return ["a"] }, getPropertyDescriptor: function() { throw "myexn" } }) TestForInThrow(Proxy.create({ get: function(pr, pk) { return function() { throw "myexn" } } }))