src/v8/test/mjsunit/regress/regress-900.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// Check that we allow accessors on JSArray elements.

var a = [];
var b = {}
Object.defineProperty(a, "1", {get: function() {return "foo";}});
Object.defineProperty(
    b, "1", {get: function() {return "bar";}, set: function() {this.x = 42;}});
assertEquals(a[1], 'foo');
assertEquals(b[1], 'bar');
// Make sure we can't overwrite an accessor, but that the setter is
// instead called.
b[1] = 'foobar';
assertEquals(b[1], 'bar');
assertEquals(b.x, 42);

var desc = Object.getOwnPropertyDescriptor(b, "1");
assertEquals(desc['writable'], undefined);
assertFalse(desc['enumerable']);
assertFalse(desc['configurable']);