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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
*/
//-----------------------------------------------------------------------------
var BUGNUMBER = 858677;
var summary =
"[].reverse should swap elements low to high using accesses to low " +
"elements, then accesses to high elements";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
var observed = [];
// (0, 7) hits the lowerExists/upperExists case.
// (1, 6) hits the !lowerExists/upperExists case.
// (2, 5) hits the lowerExists/!upperExists case.
// (3, 4) hits the !lowerExists/!upperExists case.
//
// It'd be a good idea to have a second version of this test at some point
// where the "array" being reversed is a proxy, to detect proper ordering of
// getproperty, hasproperty, setproperty into a hole, and deleteproperty from a
// non-configurable element. But at present our Array.prototype.reverse
// implementation probably doesn't conform fully to all this (because our
// internal MOP is still slightly off), so punt for now.
var props =
{
0: {
configurable: true,
get: function() { observed.push("index 0 get"); return "index 0 get"; },
set: function(v) { observed.push("index 0 set: " + v); }
},
/* 1: hole */
2: {
configurable: true,
get: function() { observed.push("index 2 get"); return "index 2 get"; },
set: function(v) { observed.push("index 2 set: " + v); }
},
/* 3: hole */
/* 4: hole */
/* 5: hole */
6: {
configurable: true,
get: function() { observed.push("index 6 get"); return "index 6 get"; },
set: function(v) { observed.push("index 6 set: " + v); }
},
7: {
configurable: true,
get: function() { observed.push("index 7 get"); return "index 7 get"; },
set: function(v) { observed.push("index 7 set: " + v); }
},
};
var arr = Object.defineProperties(new Array(8), props);
arr.reverse();
var expectedObserved =
["index 0 get", "index 7 get", "index 0 set: index 7 get", "index 7 set: index 0 get",
"index 6 get",
"index 2 get"
/* nothing for 3/4 */];
print(observed);
// Do this before the assertions below futz even more with |observed|.
assertEq(observed.length, expectedObserved.length);
for (var i = 0; i < expectedObserved.length; i++)
assertEq(observed[i], expectedObserved[i]);
assertEq(arr[0], "index 0 get"); // no deletion, setting doesn't overwrite
assertEq(arr[1], "index 6 get"); // copies result of getter
assertEq(2 in arr, false); // deleted
assertEq(3 in arr, false); // never there
assertEq(4 in arr, false); // never there
assertEq(arr[5], "index 2 get"); // copies result of getter
assertEq(6 in arr, false); // deleted
assertEq(arr[7], "index 7 get"); // no deletion, setter doesn't overwrite
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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