tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_viewport_resizing_scrollbar.js (3085B)

      1 /* Any copyright is dedicated to the Public Domain.
      2   http://creativecommons.org/publicdomain/zero/1.0/ */
      3 
      4 "use strict";
      5 
      6 // Test scrollbar appearance after viewport resizing, with and without
      7 // meta viewport support.
      8 
      9 Services.scriptloader.loadSubScript(
     10  "chrome://mochikit/content/tests/SimpleTest/WindowSnapshot.js",
     11  this
     12 );
     13 
     14 // The quest for a TEST_ROOT: we have to choose a way of addressing the RDM document
     15 // such that two things can happen:
     16 // 1) addRDMTask can load it.
     17 // 2) WindowSnapshot can take a picture of it.
     18 
     19 // The WindowSnapshot does not work cross-origin. We can't use a data URI, because those
     20 // are considered cross-origin.
     21 
     22 // let TEST_ROOT = "";
     23 
     24 // We can't use a relative URL, because addRDMTask can't load local files.
     25 // TEST_ROOT = "";
     26 
     27 // We can't use a mochi.test URL, because it's cross-origin.
     28 // TEST_ROOT =
     29 //   "http://mochi.test:8888/browser/devtools/client/responsive/test/browser/";
     30 
     31 // We can't use a chrome URL, because it triggers an assertion: RDM only available for
     32 // remote tabs.
     33 // TEST_ROOT =
     34 //   "chrome://mochitests/content/browser/devtools/client/responsive/test/browser/";
     35 
     36 // So if we had an effective TEST_ROOT, we'd use it here and run our test. But we don't.
     37 // The proposed "file_meta_1000_div.html" would just contain the html specified below as
     38 // a data URI.
     39 // const TEST_URL = TEST_ROOT + "file_meta_1000_div.html";
     40 
     41 // Instead we're going to mess with a security preference to allow a data URI to be
     42 // treated as same-origin. This doesn't work either for reasons that I don't understand.
     43 
     44 const TEST_URL =
     45  "data:text/html;charset=utf-8," +
     46  "<head>" +
     47  '<meta name="viewport" content="width=device-width, initial-scale=1"/>' +
     48  "</head>" +
     49  '<body><div style="background:orange; width:1000px; height:1000px"></div></body>';
     50 
     51 addRDMTask(TEST_URL, async function ({ ui, manager }) {
     52  // Turn on the prefs that force overlay scrollbars to always be visible.
     53  await SpecialPowers.pushPrefEnv({
     54    set: [["layout.testing.overlay-scrollbars.always-visible", true]],
     55  });
     56 
     57  info("--- Starting viewport test output ---");
     58 
     59  const browser = ui.getViewportBrowser();
     60 
     61  const expected = [false, true];
     62  for (const e of expected) {
     63    const message = "Meta Viewport " + (e ? "ON" : "OFF");
     64 
     65    // Ensure meta viewport is set.
     66    info(message + " setting meta viewport support.");
     67    await setTouchAndMetaViewportSupport(ui, e.metaSupport);
     68 
     69    // Get to the initial size and snapshot the window.
     70    await setViewportSizeAndAwaitReflow(ui, manager, 300, 600);
     71    const initialSnapshot = await snapshotWindow(browser);
     72 
     73    // Move to the rotated size.
     74    await setViewportSizeAndAwaitReflow(ui, manager, 600, 300);
     75 
     76    // Reload the window.
     77    await reloadBrowser();
     78 
     79    // Go back to the initial size and take another snapshot.
     80    await setViewportSizeAndAwaitReflow(ui, manager, 300, 600);
     81    const finalSnapshot = await snapshotWindow(browser);
     82 
     83    const result = compareSnapshots(initialSnapshot, finalSnapshot, true);
     84    is(result[2], result[1], "Window snapshots should match.");
     85  }
     86 });