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async function runNavigateAncestorTest(test_type, ancestor_type) {
// See documentation in `resources/navigate-ancestor-test-runner.https.html`.
// For each test type here, this document opens a new auxiliary window that
// runs the actual test. The tests in some way or another, direct a frame
// *inside* a fenced frame to navigate an ancestor frame via an
// <a target="_parent|_top"></a>. We need to run the real test in a new window
// so that if that window ends up navigating unexpectedly (because the fenced
// frame can accidentally navigated its embedder, for example) we can detect
// it from ths page, which never navigates away.
const navigate_ancestor_key = token();
const navigate_ancestor_from_nested_key = token();
const win = window.open(generateURL(
"resources/navigate-ancestor-test-runner.https.html",
[navigate_ancestor_key, navigate_ancestor_from_nested_key]));
await new Promise(resolve => {
win.onload = resolve;
});
const pagehidePromise = new Promise(resolve => {
win.onpagehide = resolve;
});
await win.runTest(test_type, ancestor_type);
win.close();
await pagehidePromise;
}