test_ext_streamfilter_processswitch.html

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<!DOCTYPE html>

<html>

<head>

  <title>Test for using filterResponseData to intercept a cross-origin navigation that will involve a process switch with fission</title>

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

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

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

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

</head>

<body>

<script type="text/javascript">

"use strict";

const TEST_HOST = "http://example.com/";

const CROSS_ORIGIN_HOST = "http://example.org/";

const TEST_PATH =

  "tests/toolkit/components/extensions/test/mochitest/file_streamfilter.txt";

const TEST_URL = TEST_HOST + TEST_PATH;

const CROSS_ORIGIN_URL = CROSS_ORIGIN_HOST + TEST_PATH;

add_task(async () => {

  const extension = ExtensionTestUtils.loadExtension({

    manifest: {

      permissions: ["webRequest", "webRequestBlocking", "<all_urls>"],

},

    background() {

      browser.webRequest.onBeforeRequest.addListener(

        ({ requestId }) => {

          const filter = browser.webRequest.filterResponseData(requestId);

          filter.onerror = () => browser.test.fail(

            `Unexpected filterResponseData error: ${filter.error}`

);

          filter.ondata = event => {

            filter.write(event.data);

};

          filter.onstop = () => {

            filter.write(new TextEncoder().encode(" End"));

            filter.close();

};

},

          urls: [

            "http://example.org/*/file_streamfilter.txt",

],

},

        ["blocking"]

);

},

});

  await extension.startup();

  let iframe = document.createElement("iframe");

  iframe.src = TEST_URL;

  document.body.appendChild(iframe);

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

  iframe.src = CROSS_ORIGIN_URL;

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

  let content = await SpecialPowers.spawn(iframe, [], async () => {

    return this.content.document.body.textContent;

});

  SimpleTest.is(content, "Middle\n End", "Correctly intercepted page content");

  await extension.unload();

});

</script>

</body>

</html>