test_navigationPreload_disable_crash.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Failure to create a Promise shouldn't crash</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

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

</head>

<body>

<p id="display"></p>

<div id="content" style="display: none">

</div>

<pre id="test"></pre>

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

  async function runTest() {

    const iframe = document.createElement('iframe');

    document.getElementById("content").appendChild(iframe);

    const serviceWorker = iframe.contentWindow.navigator.serviceWorker;

    const worker = await iframe.contentWindow.navigator.serviceWorker.register("empty.js", {});

    iframe.remove();

    // We can't wait for this promise to settle, because the global's

    // browsing context has been discarded when the iframe was removed.

    // We're just checking if this call crashes, which would happen

    // immediately, so ignoring the promise should be fine.

    worker.navigationPreload.disable();

    ok(true, "navigationPreload.disable() failed but didn't crash.");

    SimpleTest.finish();

  SimpleTest.waitForExplicitFinish();

  // We can't call unregister on the worker after its browsing context has been

  // discarded, so use SpecialPowers.removeAllServiceWorkerData.

  SimpleTest.registerCleanupFunction(() => SpecialPowers.removeAllServiceWorkerData());

  onload = function() {

    SpecialPowers.pushPrefEnv({"set": [

      ["dom.serviceWorkers.exemptFromPerDomainMax", true],

      ["dom.serviceWorkers.enabled", true],

      ["dom.serviceWorkers.navigationPreload.enabled", true],

      ["dom.serviceWorkers.testing.enabled", true],

    ]}, runTest);

};

</script>

</pre>

</body>

</html>