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function testInt32ToId()
{
// Ensure that a property which is a negative integer that does not fit in a
// jsval is properly detected by the 'in' operator.
var obj = { "-1073741828": 17 };
var index = -1073741819;
var a = [];
for (var i = 0; i < 10; i++)
{
a.push(index in obj);
index--;
}
// Ensure that a property which is a negative integer that does not fit in a
// jsval is properly *not* detected by the 'in' operator. In this case
// wrongly applying INT_TO_JSID to -2147483648 will shift off the sign bit
// (the only bit set in that number) and bitwise-or that value with 1,
// producing jsid(1) -- which actually represents "0", not "-2147483648".
// Thus 'in' will report a "-2147483648" property when none exists, because
// it thinks the request was really whether the object had property "0".
var obj2 = { 0: 17 };
var b = [];
var index = -(1 << 28);
for (var i = 0; i < 10; i++)
{
b.push(index in obj2);
index = index - (1 << 28);
}
return a.join(",") + b.join(",");
}
assertEq(testInt32ToId(),
"false,false,false,false,false,false,false,false,false,true" +
"false,false,false,false,false,false,false,false,false,false");
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