browser_loadURI_postdata.js

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

const gPostData = "postdata=true";

const gUrl =

  "http://mochi.test:8888/browser/docshell/test/browser/print_postdata.sjs";

add_task(async function test_loadURI_persists_postData() {

  waitForExplicitFinish();

  let tab = (gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser));

  registerCleanupFunction(function () {

    gBrowser.removeTab(tab);

});

  var dataStream = Cc["@mozilla.org/io/string-input-stream;1"].createInstance(

    Ci.nsIStringInputStream

);

  dataStream.data = gPostData;

  var postStream = Cc[

    "@mozilla.org/network/mime-input-stream;1"

  ].createInstance(Ci.nsIMIMEInputStream);

  postStream.addHeader("Content-Type", "application/x-www-form-urlencoded");

  postStream.setData(dataStream);

  var systemPrincipal = Cc["@mozilla.org/systemprincipal;1"].getService(

    Ci.nsIPrincipal

);

  tab.linkedBrowser.loadURI(Services.io.newURI(gUrl), {

    triggeringPrincipal: systemPrincipal,

    postData: postStream,

});

  await BrowserTestUtils.browserLoaded(tab.linkedBrowser, false, gUrl);

  let body = await SpecialPowers.spawn(

    tab.linkedBrowser,

[],

    () => content.document.body.textContent

);

  is(body, gPostData, "post data was submitted correctly");

  finish();

});