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Test Info:

<!doctype html>
<meta charset=utf-8>
<title>navigator.clipboard read on detaching iframe</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="../resources/user-activation.js"></script>
<iframe id="iframe"></iframe>
'use strict';
promise_test(async t => {
// This tests proper behavior on a detaching iframe. text/plain is chosen for
// simplicity, and the test should fail the same way no matter what the input
// type is.
await tryGrantReadPermission();
await tryGrantWritePermission();
const iframe = document.getElementById('iframe');
const iframeClipboard = iframe.contentWindow.navigator.clipboard;
const blobInput = new Blob(['test string'], {type: 'text/plain'});
const clipboardItemInput = new ClipboardItem({'text/plain': blobInput});
// Clipboard API must only be available in focused documents.
// An iframe detaching while writing to the clipboard should fail, but not
// crash. The lack of await here means that the iframe will detach while the
// write operation is running.[clipboardItemInput]);
}, 'Verify read fails on detaching iframe');