JSTests/stress/delete-by-id.js

function shouldBe(actual, expected)
{
    if (actual !== expected)
        throw new Error('bad value: ' + actual);
}

function test1(object)
{
    return delete object.cocoa;
}
noInline(test1);

function test2(object)
{
    return delete object.cappuccino;
}
noInline(test2);

for (var i = 0; i < 1e5; ++i) {
    var object = {
        cocoa: 42
    };
    Object.defineProperty(object, "cappuccino", {
        value: 42
    });
    shouldBe(test1(object), true);
    shouldBe(test2(object), false);
}