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<!doctype html>
<meta charset=utf-8>
<title>postMessage: Third-Party to Third-Party, Cross-Partition, Same-Origin</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
// Here's the set-up for this test:
// Step 1. (Site 1 Window) set up listener and open Site 2 Frame A.
// Step 2. (Site 2 Frame A) set up listener and open Site 3 Window.
// Step 3. (Site 3 Window) open Site 2 Frame B.
// Step 4. (Site 2 Frame B) send "Site 2 Frame B" message to Site 2 Frame A.
// Step 5. (Site 2 Frame A) receive "Site 2 Frame B" message and send "Site 2 Frame A" message to Site 1 Window.
// Step 6. (Site 1 Window) receive "Site 2 Frame A" message and exit.
async_test(t => {
// Step 6
const listener = t.step_func(e => {
if (e.data === "Site 2 Frame A") {
t.done();
}
});
// Step 1
window.addEventListener("message", listener);
const site2FrameA = document.createElement("iframe");
site2FrameA.src = "https://{{hosts[alt][]}}:{{ports[https][0]}}/html/browsers/windows/post-message/resources/third-party-to-third-party-cross-partition-same-origin-iframe-a.sub.https.html";
document.body.appendChild(site2FrameA);
}, "postMessage: Third-Party to Third-Party, Cross-Partition, Same-Origin");
</script>
</body>
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