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SimpleTest.waitForExplicitFinish();
// The main testing function.
var test = async function (isContent) {
await SpecialPowers.contentTransformsReceived(window);
// Each definition is [eventType, prefSetting]
// Where we are setting the "privacy.resistFingerprinting" pref.
let eventDefs = [
["mousedown", true],
["mouseup", true],
["mousedown", false],
["mouseup", false],
];
let testCounter = 0;
// Declare ahead of time.
let setup;
// This function is called when the event handler fires.
let handleEvent = function (event, prefVal) {
let resisting = prefVal && isContent;
if (resisting) {
is(
event.screenX,
event.clientX,
"event.screenX and event.clientX should be the same"
);
is(
event.screenY,
event.clientY,
"event.screenY and event.clientY should be the same"
);
} else {
// We can't be sure about X coordinates not being equal, but we can test Y.
isnot(event.screenY, event.clientY, "event.screenY !== event.clientY");
}
++testCounter;
if (testCounter < eventDefs.length) {
nextTest();
} else {
SimpleTest.finish();
}
};
// In this function, we set up the nth div and event handler,
// and then synthesize a mouse event in the div, to test
// whether the resulting events resist fingerprinting by
// suppressing absolute screen coordinates.
nextTest = function () {
let [eventType, prefVal] = eventDefs[testCounter];
SpecialPowers.pushPrefEnv(
{ set: [["privacy.resistFingerprinting", prefVal]] },
function () {
// The following code creates a new div for each event in eventDefs,
// attaches a listener to listen for the event, and then generates
// a fake event at the center of the div.
let div = document.createElementNS(
"http://www.w3.org/1999/xhtml",
"div"
);
div.style.width = "10px";
div.style.height = "10px";
div.style.backgroundColor = "red";
// Name the div after the event we're listening for.
div.id = eventType;
document.getElementById("body").appendChild(div);
// Seems we can't add an event listener in chrome unless we run
// it in a later task.
window.setTimeout(function () {
div.addEventListener(eventType, event => handleEvent(event, prefVal));
// For some reason, the following synthesizeMouseAtCenter call only seems to run if we
// wrap it in a window.setTimeout(..., 0).
window.setTimeout(function () {
synthesizeMouseAtCenter(div, { type: eventType });
}, 0);
}, 0);
}
);
};
// Now run by starting with the 0th event.
nextTest();
};
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