tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_test_oopif_reconstruct.js (2596B)

      1 /* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
      2 /* vim: set sts=2 sw=2 et tw=80: */
      3 /* This test is based on
      4     https://searchfox.org/mozilla-central/rev/25d26b0a62cc5bb4aa3bb90a11f3b0b7c52859c4/gfx/layers/apz/test/mochitest/browser_test_position_sticky.js
      5 */
      6 
      7 "use strict";
      8 
      9 requestLongerTimeout(2);
     10 
     11 Services.scriptloader.loadSubScript(
     12  "chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_utils.js",
     13  this
     14 );
     15 
     16 Services.scriptloader.loadSubScript(
     17  "chrome://mochitests/content/browser/gfx/layers/apz/test/mochitest/apz_test_native_event_utils.js",
     18  this
     19 );
     20 
     21 async function runOneTest(filename) {
     22  function httpURL(sfilename) {
     23    let chromeURL = getRootDirectory(gTestPath) + sfilename;
     24    return chromeURL.replace(
     25      "chrome://mochitests/content/",
     26      "http://mochi.test:8888/"
     27    );
     28  }
     29 
     30  const url = httpURL(filename);
     31  const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
     32 
     33  const { rect } = await SpecialPowers.spawn(
     34    tab.linkedBrowser,
     35    [],
     36    async () => {
     37      const container = content.document.getElementById("container");
     38 
     39      // Get the area in the screen coords where the position:sticky element is.
     40      let containerRect = container.getBoundingClientRect();
     41      containerRect.x += content.window.mozInnerScreenX;
     42      containerRect.y += content.window.mozInnerScreenY;
     43 
     44      await content.wrappedJSObject.promiseApzFlushedRepaints();
     45      await content.wrappedJSObject.waitUntilApzStable();
     46 
     47      let w = {},
     48        h = {};
     49      SpecialPowers.DOMWindowUtils.getScrollbarSizes(
     50        content.document.documentElement,
     51        w,
     52        h
     53      );
     54 
     55      // Reduce the scrollbar width from the sticky area.
     56      containerRect.width -= w.value;
     57      return {
     58        rect: containerRect,
     59      };
     60    }
     61  );
     62 
     63  const reference = await getSnapshot({
     64    x: rect.x,
     65    y: rect.y,
     66    width: rect.width,
     67    height: rect.height,
     68  });
     69 
     70  await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
     71    // start the toggling the position on a setInterval which triggers the bug
     72    content.wrappedJSObject.doTest();
     73  });
     74 
     75  // have to try many times to capture the bug
     76  for (let i = 0; i < 100; i++) {
     77    let snapshot = await getSnapshot({
     78      x: rect.x,
     79      y: rect.y,
     80      width: rect.width,
     81      height: rect.height,
     82    });
     83 
     84    is(snapshot, reference, "should be same " + filename);
     85  }
     86 
     87  BrowserTestUtils.removeTab(tab);
     88 }
     89 
     90 add_task(async () => {
     91  await runOneTest("helper_oopif_reconstruct.html");
     92  await runOneTest("helper_oopif_reconstruct_nested.html");
     93 });