test_bug1382499_touch_api.html

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<!DOCTYPE html>

<meta charset="utf-8">

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

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

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

<script>

/* global SimpleTest SpecialPowers synthesizeTouch */

SimpleTest.waitForExplicitFinish();

function promiseEvent(target, eventName) {

  return new Promise(resolve => {

    target.addEventListener(eventName, resolve, {once: true});

});

function promiseTouchEvent(target, type, offsetX, offsetY, params) {

  let touchEventPromise = promiseEvent(target, type);

  params.type = type;

  synthesizeTouch(target, offsetX, offsetY, params);

  return touchEventPromise;

document.addEventListener("DOMContentLoaded", async () => {

  const target0 = document.getElementById("target0");

  const touchParams = {force: 1.0, angle: 1.0, rx: 2, ry: 3};

  await SpecialPowers.pushPrefEnv({set: [["dom.w3c_touch_events.enabled", 1]]});

  for (let seq of [0, 1, 2, 3]) {

    let resist = false;

    if (seq == 0) {

      resist = true;

      await SpecialPowers.pushPrefEnv({set: [["privacy.resistFingerprinting", true]]});

    } else if (seq == 1) {

      await SpecialPowers.pushPrefEnv({set: [["privacy.resistFingerprinting", false]]});

    } else if (seq == 2) {

      resist = true;

      await SpecialPowers.pushPrefEnv({set: [

        ["privacy.fingerprintingProtection", true],

        ["privacy.fingerprintingProtection.overrides", "+TouchEvents"]

      ]});

    } else {

      await SpecialPowers.pushPrefEnv({set: [

        ["privacy.fingerprintingProtection", true],

        ["privacy.fingerprintingProtection.overrides", "-TouchEvents"]

      ]});

    info("starting test with fingerprinting resistance " + (resist ? "on" : "off") + " sequence number " + seq);

    let touchEvent = await promiseTouchEvent(target0, "touchstart", 5, 5, touchParams);

    info("touch event received");

    let touch = touchEvent.touches[0];

    if (resist) {

      is(touch.screenX, touch.clientX, "touch.screenX should be the same as touch.clientX");

      is(touch.screenY, touch.clientY, "touch.screenY should be the same as touch.clientY");

      // radiusX/radiusY may differ from the original rx/ry because of AppUnitsPerCSSPixel and AppUnitsPerDevPixel.

      // So only check if the values are spoofed.

      is(touch.radiusX, 0, "touch.radiusX");

      is(touch.radiusY, 0, "touch.radiusY");

    is(touch.force, resist ? 0.0 : touchParams.force, "touch.force");

    is(touch.rotationAngle, resist ? 0 : touchParams.angle, "touch.rotationAngle");

    await SpecialPowers.popPrefEnv();

  SimpleTest.finish();

});

</script>

<div id="target0">target 0</div>