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