forked from mirrors/gecko-dev
632c7423fc
Differential Revision: https://phabricator.services.mozilla.com/D13129 --HG-- extra : moz-landing-system : lando
75 lines
2.5 KiB
JavaScript
75 lines
2.5 KiB
JavaScript
/* globals chromeWindow */
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// The main test function.
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var test = function(isContent) {
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SimpleTest.waitForExplicitFinish();
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SpecialPowers.pushPrefEnv({"set": [["security.allow_eval_with_system_principal", true]]});
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let { ww } = SpecialPowers.Services;
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window.chromeWindow = ww.activeWindow;
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// The pairs of values expected to be the same when
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// fingerprinting resistance is enabled.
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let pairs = [
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["screenX", 0],
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["screenY", 0],
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["mozInnerScreenX", 0],
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["mozInnerScreenY", 0],
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["screen.pixelDepth", 24],
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["screen.colorDepth", 24],
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["screen.availWidth", "innerWidth"],
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["screen.availHeight", "innerHeight"],
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["screen.left", 0],
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["screen.top", 0],
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["screen.availLeft", 0],
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["screen.availTop", 0],
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["screen.width", "innerWidth"],
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["screen.height", "innerHeight"],
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["screen.orientation.type", "'landscape-primary'"],
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["screen.orientation.angle", 0],
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["screen.mozOrientation", "'landscape-primary'"],
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["devicePixelRatio", 1],
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];
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// checkPair: tests if members of pair [a, b] are equal when evaluated.
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let checkPair = function(a, b) {
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// eslint-disable-next-line no-eval
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is(eval(a), eval(b), a + " should be equal to " + b);
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};
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// Returns generator object that iterates through pref values.
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let prefVals = (function* () { yield false; yield true; })();
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// The main test function, runs until all pref values are exhausted.
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let nextTest = function() {
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let {value: prefValue, done} = prefVals.next();
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if (done) {
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SimpleTest.finish();
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return;
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}
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SpecialPowers.pushPrefEnv({set: [["privacy.resistFingerprinting", prefValue]]},
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function() {
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// We will be resisting fingerprinting if the pref is enabled,
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// and we are in a content script (not chrome).
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let resisting = prefValue && isContent;
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// Check each of the pairs.
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pairs.map(function([item, onVal]) {
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if (resisting) {
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checkPair("window." + item, onVal);
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} else if (!item.startsWith("moz")) {
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checkPair("window." + item, "chromeWindow." + item);
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}
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});
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if (!resisting) {
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// Hard to predict these values, but we can enforce constraints:
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ok(window.mozInnerScreenX >= chromeWindow.mozInnerScreenX,
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"mozInnerScreenX");
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ok(window.mozInnerScreenY >= chromeWindow.mozInnerScreenY,
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"mozInnerScreenY");
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}
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nextTest();
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});
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};
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nextTest();
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};
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