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-rw-r--r--dom/base/test/chrome/bug418986-1.js88
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diff --git a/dom/base/test/chrome/bug418986-1.js b/dom/base/test/chrome/bug418986-1.js
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+++ b/dom/base/test/chrome/bug418986-1.js
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+/* globals chromeWindow */
+// The main test function.
+var test = function (isContent) {
+ SimpleTest.waitForExplicitFinish();
+
+ SpecialPowers.pushPrefEnv({
+ set: [["security.allow_eval_with_system_principal", true]],
+ });
+
+ if (!isContent) {
+ let { ww } = SpecialPowers.Services;
+ window.chromeWindow = ww.activeWindow;
+ }
+
+ // The pairs of values expected to be the same when
+ // fingerprinting resistance is enabled.
+ let pairs = [
+ ["screenX", 0],
+ ["screenY", 0],
+ ["mozInnerScreenX", 0],
+ ["mozInnerScreenY", 0],
+ ["screen.pixelDepth", 24],
+ ["screen.colorDepth", 24],
+ ["screen.availWidth", "innerWidth"],
+ ["screen.availHeight", "innerHeight"],
+ ["screen.left", 0],
+ ["screen.top", 0],
+ ["screen.availLeft", 0],
+ ["screen.availTop", 0],
+ ["screen.width", "innerWidth"],
+ ["screen.height", "innerHeight"],
+ ["screen.orientation.type", "'landscape-primary'"],
+ ["screen.orientation.angle", 0],
+ ["screen.mozOrientation", "'landscape-primary'"],
+ ["devicePixelRatio", 1],
+ ];
+
+ // checkPair: tests if members of pair [a, b] are equal when evaluated.
+ let checkPair = function (a, b) {
+ // eslint-disable-next-line no-eval
+ is(eval(a), eval(b), a + " should be equal to " + b);
+ };
+
+ // Returns generator object that iterates through pref values.
+ let prefVals = (function* () {
+ yield false;
+ yield true;
+ })();
+
+ // The main test function, runs until all pref values are exhausted.
+ let nextTest = function () {
+ let { value: prefValue, done } = prefVals.next();
+ if (done) {
+ SimpleTest.finish();
+ return;
+ }
+ SpecialPowers.pushPrefEnv(
+ { set: [["privacy.resistFingerprinting", prefValue]] },
+ function () {
+ // We will be resisting fingerprinting if the pref is enabled,
+ // and we are in a content script (not chrome).
+ let resisting = prefValue && isContent;
+ // Check each of the pairs.
+ pairs.map(function ([item, onVal]) {
+ if (resisting) {
+ checkPair("window." + item, onVal);
+ } else if (!isContent && !item.startsWith("moz")) {
+ checkPair("window." + item, "chromeWindow." + item);
+ }
+ });
+ if (!isContent && !resisting) {
+ // Hard to predict these values, but we can enforce constraints:
+ ok(
+ window.mozInnerScreenX >= chromeWindow.mozInnerScreenX,
+ "mozInnerScreenX"
+ );
+ ok(
+ window.mozInnerScreenY >= chromeWindow.mozInnerScreenY,
+ "mozInnerScreenY"
+ );
+ }
+ nextTest();
+ }
+ );
+ };
+
+ nextTest();
+};