File: test_nonce_snapshot.html

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<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>Bug 1509738 - Snapshot nonce at load start time</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<iframe style="width:100%;" id="testframe"></iframe>

<script class="testbody" type="text/javascript">

/* Description of the test:
 * a) the test starts loading a script using allowlisted nonce
 * b) the nonce of the script gets modified
 * c) the script hits a 302 server side redirect
 * d) we ensure the script still loads and does not use the modified nonce
 */

window.addEventListener("message", receiveMessage);
function receiveMessage(event) {
  is(event.data, "script-loaded", "script loaded even though nonce was dynamically modified");
  window.removeEventListener("message", receiveMessage);
  SimpleTest.finish();
}


SimpleTest.waitForExplicitFinish();
let src = "file_nonce_snapshot.sjs?load-frame";
document.getElementById("testframe").src = src;

</script>
</body>
</html>