mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
147 lines
3.2 KiB
JavaScript
147 lines
3.2 KiB
JavaScript
// Copyright JS Foundation and other contributors, http://js.foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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var object = {};
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var symbol = Symbol("symbol");
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Object.defineProperties(object, {
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a: {
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value: 42,
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enumerable: true
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},
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b: {
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value: "foo",
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enumerable: false
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},
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[symbol]: {
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value: "symbol",
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enumerable: true
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}
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});
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// Object.keys and Object.entries should have the same keys
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var keys = Object.keys(object);
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var entries = Object.entries(object);
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assert(keys.length === entries.length);
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for (let i = 0; i < keys.length; i++) {
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assert(keys[i] === entries[i][0]);
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}
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// Test object entries
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var entries = Object.entries(object);
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assert(entries instanceof Array);
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assert(entries.length === 1);
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assert(entries[0].length === 2);
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assert(entries[0][0] === "a");
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assert(entries[0][1] === 42);
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// Test array entries
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var array = [1, 2, "three"];
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var entries = Object.entries(array);
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assert(entries instanceof Array);
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assert(entries.length === array.length);
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for (let i = 0; i < entries.length; i++) {
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assert(entries[i][0] === i + "");
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assert(entries[i][1] === array[i]);
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}
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// Test prototype chain
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function Parent() {}
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Parent.prototype.inheritedMethod = function() {};
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function method() {};
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function Child() {
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this.prop = 5;
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this.method = method;
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}
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Child.prototype = new Parent;
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Child.prototype.prototypeMethod = function() {};
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var entries = Object.entries (new Child());
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assert(entries.length === 2);
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assert(entries[0][0] === "prop");
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assert(entries[0][1] === 5);
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assert(entries[1][0] === "method");
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assert(entries[1][1] === method);
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// Test with primitive values
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var entries = Object.entries(true);
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assert(entries instanceof Array);
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assert(entries.length === 0);
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try {
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Object.entries(undefined);
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assert(false);
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} catch (e) {
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assert(e instanceof TypeError)
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}
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try {
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Object.entries(null);
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assert(false);
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} catch (e) {
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assert(e instanceof TypeError)
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}
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// Test proxy object
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var object = {};
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Object.defineProperties(object, {
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a: {
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value: "foo",
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enumerable: false
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},
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b: {
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value: "bar",
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enumerable: true,
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writable: false
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}
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});
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var proxy = new Proxy(object, {
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getOwnPropertyDescriptor: function(o, v) {
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handlers.push("D");
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return Object.getOwnPropertyDescriptor(o, v);
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},
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get: function(o, v) {
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handlers.push("G");
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return o[v];
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}
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});
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var handlers = [];
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var entries = Object.entries(proxy);
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assert(entries.length === 1);
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assert(entries[0][0] === "b");
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assert(entries[0][1] === "bar");
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assert(handlers.length === 3);
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assert(handlers.toString() === "D,D,G");
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// exception during enumeration
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var obj = {
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get a() { throw "error" },
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get b() { throw "shouldn't run" }
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};
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try {
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Object.entries(obj);
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} catch (err) {
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assert(err == "error")
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}
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