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<!doctype html>
<meta charset="utf-8">
<title>window.parent</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
test(function() {
assert_equals(window, parent)
}, '`window.parent` for top-level browsing context');
async_test(t => {
var iframe = document.createElement('iframe');
iframe.onload = t.step_func_done(function () {
var iWindow = iframe.contentWindow;
assert_equals(iWindow.parent, window);
});
document.body.appendChild(iframe);
}, '`window.parent` on single nested browsing context');
async_test(t => {
var iframe = document.createElement('iframe');
var iframe2;
var testFunc = t.step_func_done(function () {
var frameWindow = iframe.contentWindow;
var frame2Window = iframe2.contentWindow;
assert_equals(frameWindow.parent, window);
assert_equals(frame2Window.parent, frameWindow);
assert_not_equals(frame2Window.parent, window);
});
var nestFrame = function () {
iframe2 = iframe.contentDocument.createElement('iframe');
// Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1229707
iframe2.src = '/common/blank.html';
iframe2.addEventListener('load', testFunc);
iframe.contentDocument.body.appendChild(iframe2);
};
iframe.addEventListener('load', nestFrame);
document.body.appendChild(iframe);
}, '`window.parent` for multiple nested browsing contexts');
</script>
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