credentialscontainer-frame-basics.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /credential-management/credentialscontainer-frame-basics.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>navigator.credentials frame tests</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body></body>

<script>

  promise_test(async t => {

    let PROBE_CREDENTIALS = "<script>window.parent.postMessage(String(navigator.credentials), '*');<\/script>";

    let frame = document.createElement("iframe");

    const loadPromise = new EventWatcher(t, frame, "load").wait_for("load");

    frame.src = "data:text/html," + PROBE_CREDENTIALS;

    document.body.append(frame);

    await loadPromise;

    let eventWatcher = new EventWatcher(t, window, "message");

    const { data } = await eventWatcher.wait_for("message");

    assert_equals(data, "undefined");

  }, "navigator.credentials should be undefined in documents generated from `data:` URLs.");

</script>