testing/web-platform/tests/clipboard-apis/detached-iframe/write-read-on-detached-iframe.https.html

   1 <!doctype html>
   2 <meta charset=utf-8>
   3 <title>navigator.clipboard read and write on detached iframe</title>
   4 <link rel='help' href='https://w3c.github.io/clipboard-apis/#async-clipboard-api'>
   5 <script src="/resources/testharness.js"></script>
   6 <script src="/resources/testharnessreport.js"></script>
   7 <script src="/resources/testdriver.js"></script>
   8 <script src="/resources/testdriver-vendor.js"></script>
   9 <script src="../resources/user-activation.js"></script>
  10 <iframe id="iframe"></iframe>
  11 <script>
  12 'use strict';
  13
  14 promise_test(async t => {
  15   // This tests proper behavior on a detaching iframe. text/plain is chosen for
  16   // simplicity, and the test should fail the same way no matter what the input
  17   // type is.
  18   await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
  19   await test_driver.set_permission({name: 'clipboard-write'}, 'granted');
  20
  21   const iframe = document.getElementById('iframe');
  22   const iframeClipboard = iframe.contentWindow.navigator.clipboard;
  23   const blobInput = new Blob(['test string'], {type: 'text/plain'});
  24   const clipboardItemInput = new ClipboardItem({'text/plain': blobInput});
  25   await waitForUserActivation();
  26   // Clipboard API must only be available in focused documents.
  27   // reference: https://www.w3.org/TR/clipboard-apis/#privacy-async
  28   iframe.focus();
  29
  30   // Writing and reading should succeed on same-origin iframes.
  31   await iframeClipboard.write([clipboardItemInput]);
  32   const readResultAttached = await iframeClipboard.read();
  33   assert_not_equals(readResultAttached, undefined);
  34   assert_equals(readResultAttached.length, 1,
  35       'attached iframes should be able to read and write normally');
  36
  37   iframe.parentNode.removeChild(iframe);
  38   // Writing onto a detached iframe's clipboard should fail, but not crash.
  39   await iframeClipboard.write([clipboardItemInput]);
  40   const readResultDetached = await iframeClipboard.read();
  41   assert_equals(readResultDetached, undefined,
  42       'reading from detached iframes should output undefined');
  43 }, 'Verify read and write fail on detached iframe');
  44 </script>