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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test WeakRef works when target is in different compartment in the browser</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="application/javascript">
function go() {
SimpleTest.waitForExplicitFinish();
let Cu = SpecialPowers.Cu;
let isSameCompartment = Cu.getJSTestingFunctions().isSameCompartment;
// Open a new window, which will be from different compartment.
let win = window.open();
is(isSameCompartment(win, window), false,
"Test for opeing a window from a different compartment.");
let wr1, wr2, wr3;
{
let obj = {};
// WeakRef and target are both from different compartment.
wr1 = new win.WeakRef(new win.Object());
// WeakRef is same compartment, but target isn't.
wr2 = new WeakRef(new win.Object());
// WeakRef is in different compartment, but target is.
wr3 = new win.WeakRef(obj);
obj = null;
}
// WeakRef should keep the target in the current task.
isnot(wr1.deref(), undefined, "wr1.deref() should return its target.");
isnot(wr2.deref(), undefined, "wr2.deref() should return its target.");
isnot(wr3.deref(), undefined, "we3.deref() should return its target.");
// Weakref should keep the target until the end of current Job, that
// includes microtask(Promise).
Promise.resolve().then(() => {
isnot(wr1.deref(), undefined,
"wr1.deref() should return its target in promise");
isnot(wr2.deref(), undefined,
"wr2.deref() should return its target in promise");
isnot(wr3.deref(), undefined,
"wr3.deref() should return its target in promise");
});
// setTimeout will launch a new job and call ClearKeptObjects().
setTimeout(() => {
// Call gc() forcibly to clear the target of wr.
SpecialPowers.DOMWindowUtils.garbageCollect();
is(wr1.deref(), undefined, "wr1.deref() should return undefined in the new job.");
is(wr2.deref(), undefined, "wr2.deref() should return undefined in the new job.");
is(wr3.deref(), undefined, "wr3.deref() should return undefined in the new job.");
win.close();
SimpleTest.finish();
}, 0);
}
</script>
</head>
<body onload="go()"></body>
</html>
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