// Tests that a popup about:blank window inherits its base url from
// the initiator, and not the opener.
const runTest = (description) => {
const opener_base_uri = document.baseURI;
promise_test((test) => {
return new Promise(async resolve => {
window.popup = window.open();
test.add_cleanup(() => popup.close());
assert_equals(window.popup.location.href, 'about:blank');
// Create iframe to be the initiator.
const iframe = document.createElement('iframe');
iframe.srcdoc = `