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2dcc3665ab
PR-URL: https://github.com/nodejs/node/pull/28016 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
30 lines
923 B
JavaScript
30 lines
923 B
JavaScript
// Copyright 2014 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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// Flags: --allow-natives-syntax
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Object.defineProperty(Array.prototype, "1", {
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get: function() { return "element 1"; },
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set: function(value) { }
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});
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function test(array) {
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array.shift();
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return array;
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}
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%PrepareFunctionForOptimization(test);
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var result = test(["0",,2]);
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assertEquals(["element 1","element 1"], result);
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assertTrue(result.hasOwnProperty("0"));
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assertFalse(result.hasOwnProperty("1"));
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result = test([{},,{}]);
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assertEquals(["element 1","element 1"], result);
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assertTrue(result.hasOwnProperty("0"));
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assertFalse(result.hasOwnProperty("1"));
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%OptimizeFunctionOnNextCall(test);
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result = test([{},,0]);
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assertEquals(["element 1","element 1"], result);
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assertTrue(result.hasOwnProperty("0"));
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assertFalse(result.hasOwnProperty("1"));
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