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load(libdir + "asserts.js");
var target = {x:5};
var magic = false;
var returnValue = 42;
var handler = {
get(t, p, a, b) {
assertEq(a, proxy);
assertEq(b, undefined);
assertEq(arguments.length, 3);
if (magic) {
Object.defineProperty(target, 'x', {
value: 42,
writable: false,
configurable: false
});
if (returnValue != 42) {
gc(testGet, "shrinking");
}
}
return returnValue;
}
};
var proxy = new Proxy(target, handler);
// Use an array that sometimes has a proxy and sometimes not, to get to
// the Ion IC path.
var maybeProxies = [
{x: returnValue},
proxy,
];
function testGet(p) {
return p.x;
}
for (i = 0; i < 200; i++) {
assertEq(testGet(maybeProxies[i % maybeProxies.length]), returnValue);
}
magic = true;
assertEq(testGet(proxy), returnValue);
returnValue = 41;
assertThrowsInstanceOf(function () { testGet(proxy) }, TypeError);