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<html>
<head>
<script>
async function wait() {
return opener.SpecialPowers.spawnChrome([], function() { /*dummy */ });
}
async function run() {
var counter = 0;
while(true) {
// Push new history entries until we hit the limit and start removing
// entries from the front.
var len = history.length;
document.getElementById("ifr1").contentWindow.history.pushState(++counter, null, null);
await wait();
if (len == history.length) {
opener.ok(true, "Found max length " + len);
document.getElementById("ifr2").contentWindow.history.pushState(++counter, null, null);
await wait();
document.getElementById("ifr1").contentWindow.history.pushState(++counter, null, null);
await wait();
opener.is(len, history.length, "Adding session history entries in different iframe should behave the same way");
// This should remove all the history entries for ifr1, leaving just
// the ones for ifr2.
document.getElementById("ifr1").remove();
opener.is(history.length, 2, "Should have entries for the initial load and the pushState for ifr2");
opener.finishTest();
break;
}
}
}
</script>
</head>
<body onload="setTimeout(run)">
<iframe src="blank.html" id="ifr1"></iframe>
<iframe src="blank.html" id="ifr2"></iframe>
</body>
</html>