test_unhandledrejection_chrome_stack.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=2078496

-->

<head>

  <meta charset="utf-8">

  <title>Test for Bug 2078496</title>

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=2078496">Mozilla Bug 2078496</a>

<iframe id="frame" src="data:text/html,"></iframe>

<script type="text/javascript">

/**

 * An unhandled rejection in a content window whose rejection stack lives in

 * a chrome compartment must be reported without crashing.

*/

add_task(async function test_unhandled_rejection_with_chrome_stack() {

  const frame = document.getElementById("frame");

  if (frame.contentDocument?.readyState !== "complete") {

    await new Promise(resolve => frame.addEventListener("load", resolve, { once: true }));

  const win = frame.contentWindow;

  Cu.exportFunction(

    () => {

      // eslint-disable-next-line no-throw-literal

      throw "thrown from chrome";

},

    win,

    { defineAs: "throwFromChrome" }

);

  const unhandled = new Promise(resolve =>

    win.addEventListener("unhandledrejection", e => resolve(e.reason), { once: true })

);

  Cu.waiveXrays(win).eval("Promise.resolve().then(throwFromChrome)");

  is(await unhandled, "thrown from chrome", "unhandledrejection fired");

  await new Promise(resolve => SimpleTest.executeSoon(resolve));

  ok(true, "Reporting the rejection did not crash");

});

</script>

</body>

</html>