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/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/ */
const ps = Services.prefs;
// It is necessary to manually disable `xpc::IsInAutomation` since
// `resetPrefs` will flip the preference to re-enable `once`-synced
// preference change assertions, and also change the value of those
// preferences.
Services.prefs.setBoolPref(
"security.turn_off_all_security_so_that_viruses_can_take_over_this_computer",
false
);
// A little helper to reset the service and load one pref file.
function resetAndLoadDefaults() {
ps.resetPrefs();
ps.readDefaultPrefsFromFile(do_get_file("data/testPrefSticky.js"));
}
// A little helper to reset the service and load two pref files.
function resetAndLoadAll() {
ps.resetPrefs();
ps.readDefaultPrefsFromFile(do_get_file("data/testPrefSticky.js"));
ps.readUserPrefsFromFile(do_get_file("data/testPrefStickyUser.js"));
}
// A little helper that saves the current state to a file in the profile
// dir, then resets the service and re-reads the file it just saved.
// Used to test what gets actually written - things the pref service decided
// not to write don't exist at all after this call.
function saveAndReload() {
let file = do_get_profile();
file.append("prefs.js");
ps.savePrefFile(file);
// Now reset the pref service and re-read what we saved.
ps.resetPrefs();
// Hack alert: on Windows nsLocalFile caches the size of savePrefFile from
// the .create() call above as 0. We call .exists() to reset the cache.
file.exists();
ps.readUserPrefsFromFile(file);
}
// A sticky pref should not be written if the value is unchanged.
add_test(function notWrittenWhenUnchanged() {
resetAndLoadDefaults();
Assert.strictEqual(ps.getBoolPref("testPref.unsticky.bool"), true);
Assert.strictEqual(ps.getBoolPref("testPref.sticky.bool"), false);
// write prefs - but we haven't changed the sticky one, so it shouldn't be written.
saveAndReload();
// sticky should not have been written to the new file.
try {
ps.getBoolPref("testPref.sticky.bool");
Assert.ok(false, "expected failure reading this pref");
} catch (ex) {
Assert.ok(ex, "exception reading regular pref");
}
run_next_test();
});
// Loading a sticky `pref` then a `user_pref` for the same pref means it should
// always be written.
add_test(function writtenOnceLoadedWithoutChange() {
// Load the same pref file *as well as* a pref file that has a user_pref for
// our sticky with the default value. It should be re-written without us
// touching it.
resetAndLoadAll();
// reset and re-read what we just wrote - it should be written.
saveAndReload();
Assert.strictEqual(
ps.getBoolPref("testPref.sticky.bool"),
false,
"user_pref was written with default value"
);
run_next_test();
});
// If a sticky pref is explicicitly changed, even to the default, it is written.
add_test(function writtenOnceLoadedWithChangeNonDefault() {
// Load the same pref file *as well as* a pref file that has a user_pref for
// our sticky - then change the pref. It should be written.
resetAndLoadAll();
// Set a new val and check we wrote it.
ps.setBoolPref("testPref.sticky.bool", false);
saveAndReload();
Assert.strictEqual(
ps.getBoolPref("testPref.sticky.bool"),
false,
"user_pref was written with custom value"
);
run_next_test();
});
// If a sticky pref is changed to the non-default value, it is written.
add_test(function writtenOnceLoadedWithChangeNonDefault() {
// Load the same pref file *as well as* a pref file that has a user_pref for
// our sticky - then change the pref. It should be written.
resetAndLoadAll();
// Set a new val and check we wrote it.
ps.setBoolPref("testPref.sticky.bool", true);
saveAndReload();
Assert.strictEqual(
ps.getBoolPref("testPref.sticky.bool"),
true,
"user_pref was written with custom value"
);
run_next_test();
});
// Test that prefHasUserValue always returns true whenever there is a sticky
// value, even when that value matches the default. This is mainly for
// about:config semantics - prefs with a sticky value always remain bold and
// always offer "reset" (which fully resets and drops the sticky value as if
// the pref had never changed.)
add_test(function hasUserValue() {
// sticky pref without user value.
resetAndLoadDefaults();
Assert.strictEqual(ps.getBoolPref("testPref.sticky.bool"), false);
Assert.ok(
!ps.prefHasUserValue("testPref.sticky.bool"),
"should not initially reflect a user value"
);
ps.setBoolPref("testPref.sticky.bool", false);
Assert.ok(
ps.prefHasUserValue("testPref.sticky.bool"),
"should reflect a user value after set to default"
);
ps.setBoolPref("testPref.sticky.bool", true);
Assert.ok(
ps.prefHasUserValue("testPref.sticky.bool"),
"should reflect a user value after change to non-default"
);
ps.clearUserPref("testPref.sticky.bool");
Assert.ok(
!ps.prefHasUserValue("testPref.sticky.bool"),
"should reset to no user value"
);
ps.setBoolPref("testPref.sticky.bool", false, "expected default");
// And make sure the pref immediately reflects a user value after load.
resetAndLoadAll();
Assert.strictEqual(ps.getBoolPref("testPref.sticky.bool"), false);
Assert.ok(
ps.prefHasUserValue("testPref.sticky.bool"),
"should have a user value when loaded value is the default"
);
run_next_test();
});
// Test that clearUserPref removes the "sticky" value.
add_test(function clearUserPref() {
// load things such that we have a sticky value which is the same as the
// default.
resetAndLoadAll();
ps.clearUserPref("testPref.sticky.bool");
// Once we save prefs the sticky pref should no longer be written.
saveAndReload();
try {
ps.getBoolPref("testPref.sticky.bool");
Assert.ok(false, "expected failure reading this pref");
} catch (ex) {
Assert.ok(ex, "pref doesn't have a sticky value");
}
run_next_test();
});
// Test that a pref observer gets a notification fired when a sticky pref
// has it's value changed to the same value as the default. The reason for
// this behaviour is that later we might have other code that cares about a
// pref being sticky (IOW, we notify due to the "state" of the pref changing
// even if the value has not)
add_test(function observerFires() {
// load things so there's no sticky value.
resetAndLoadDefaults();
function observe(subject, topic, data) {
Assert.equal(data, "testPref.sticky.bool");
ps.removeObserver("testPref.sticky.bool", observe);
run_next_test();
}
ps.addObserver("testPref.sticky.bool", observe);
ps.setBoolPref(
"testPref.sticky.bool",
ps.getBoolPref("testPref.sticky.bool")
);
// and the observer will fire triggering the next text.
});
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