96 lines
2.8 KiB
JavaScript
96 lines
2.8 KiB
JavaScript
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// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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function enumerate(o) {
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var keys = [];
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for (var key in o) keys.push(key);
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return keys;
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}
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(function testSlowSloppyArgumentsElements() {
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function slowSloppyArguments(a, b, c) {
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arguments[10000] = "last";
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arguments[4000] = "first";
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arguments[6000] = "second";
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arguments[5999] = "x";
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arguments[3999] = "y";
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return arguments;
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}
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assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000", "10000"],
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Object.keys(slowSloppyArguments(1, 2, 3)));
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assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000", "10000"],
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enumerate(slowSloppyArguments(1,2,3)));
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})();
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(function testSlowSloppyArgumentsElementsNotEnumerable() {
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function slowSloppyArguments(a, b, c) {
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Object.defineProperty(arguments, 10000, {
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enumerable: false, configurable: false, value: "NOPE"
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});
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arguments[4000] = "first";
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arguments[6000] = "second";
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arguments[5999] = "x";
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arguments[3999] = "y";
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return arguments;
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}
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assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000"],
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Object.keys(slowSloppyArguments(1, 2, 3)));
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assertEquals(["0", "1", "2", "3999", "4000", "5999", "6000"],
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enumerate(slowSloppyArguments(1,2,3)));
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})();
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(function testFastSloppyArgumentsElements() {
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function fastSloppyArguments(a, b, c) {
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arguments[5] = 1;
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arguments[7] = 0;
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arguments[3] = 2;
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return arguments;
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}
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assertEquals(["0", "1", "2", "3", "5", "7"],
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Object.keys(fastSloppyArguments(1, 2, 3)));
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assertEquals(
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["0", "1", "2", "3", "5", "7"], enumerate(fastSloppyArguments(1, 2, 3)));
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function fastSloppyArguments2(a, b, c) {
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delete arguments[0];
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arguments[0] = "test";
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return arguments;
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}
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assertEquals(["0", "1", "2"], Object.keys(fastSloppyArguments2(1, 2, 3)));
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assertEquals(["0", "1", "2"], enumerate(fastSloppyArguments2(1, 2, 3)));
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})();
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(function testFastSloppyArgumentsElementsNotEnumerable() {
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function fastSloppyArguments(a, b, c) {
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Object.defineProperty(arguments, 5, {
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enumerable: false, configurable: false, value: "NOPE"
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});
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arguments[7] = 0;
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arguments[3] = 2;
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return arguments;
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}
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assertEquals(
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["0", "1", "2", "3", "7"], Object.keys(fastSloppyArguments(1, 2, 3)));
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assertEquals(
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["0", "1", "2", "3", "7"], enumerate(fastSloppyArguments(1,2,3)));
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function fastSloppyArguments2(a, b, c) {
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delete arguments[0];
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Object.defineProperty(arguments, 1, {
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enumerable: false, configurable: false, value: "NOPE"
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});
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arguments[0] = "test";
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return arguments;
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}
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assertEquals(["0", "2"], Object.keys(fastSloppyArguments2(1, 2, 3)));
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assertEquals(["0", "2"], enumerate(fastSloppyArguments2(1, 2, 3)));
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})();
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