David P
7d3b6d8edc
nsIPrefOverrideMap is a fast and JS/C++-convenient map of prefs to values that we will use to override currently-set pref values when serializing prefs for FxBackup later in this patch series. FxBackup needs this to avoid storing values set by Nimbus. Differential Revision: https://phabricator.services.mozilla.com/D262456
69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const BOOL_TEST_PREF = "test.nsPrefOverrideMap.bool";
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const INT_TEST_PREF = "test.nsPrefOverrideMap.int";
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const STRING_TEST_PREF = "test.nsPrefOverrideMap.string";
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add_task(async function test_map() {
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let map = Cc["@mozilla.org/pref-override-map;1"].createInstance(
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Ci.nsIPrefOverrideMap
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);
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// Set types of prefs. Map operations must respect them.
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Services.prefs.setBoolPref(BOOL_TEST_PREF, false);
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Services.prefs.setIntPref(INT_TEST_PREF, -1);
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Services.prefs.setStringPref(STRING_TEST_PREF, "string");
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Assert.throws(
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() => map.addEntry("not.a.real.pref", 0),
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/NS_ERROR_DOM_NOT_FOUND_ERR/
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);
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Assert.throws(
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() => map.getEntry("not.a.real.pref"),
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/NS_ERROR_DOM_NOT_FOUND_ERR/
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);
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// Entry must be added to map before getEntry
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Assert.throws(() => map.getEntry(BOOL_TEST_PREF), /NS_ERROR_ILLEGAL_VALUE/);
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// Entry value can be changed.
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map.addEntry(BOOL_TEST_PREF, false);
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Assert.equal(map.getEntry(BOOL_TEST_PREF), false);
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map.addEntry(BOOL_TEST_PREF, true);
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Assert.equal(map.getEntry(BOOL_TEST_PREF), true);
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// Cannot change pref value type
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Assert.throws(
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() => map.addEntry(BOOL_TEST_PREF, "wrong type"),
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/TypeMismatchError/
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);
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Assert.throws(
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() => map.addEntry(INT_TEST_PREF, "wrong type"),
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/TypeMismatchError/
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);
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Assert.throws(
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() => map.addEntry(STRING_TEST_PREF, true),
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/TypeMismatchError/
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);
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// null value is allowed for any type
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Assert.equal(map.getEntry(BOOL_TEST_PREF), true);
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map.addEntry(BOOL_TEST_PREF, null);
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Assert.equal(map.getEntry(BOOL_TEST_PREF), null);
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map.addEntry(INT_TEST_PREF, null);
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Assert.equal(map.getEntry(INT_TEST_PREF), null);
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map.addEntry(STRING_TEST_PREF, null);
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Assert.equal(map.getEntry(STRING_TEST_PREF), null);
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// Type must be bool, number, string or null
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Assert.throws(() => map.addEntry(BOOL_TEST_PREF, {}), /TypeMismatchError/);
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Assert.equal(map.getEntry(BOOL_TEST_PREF), null);
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// Cleanup
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Services.prefs.clearUserPref(BOOL_TEST_PREF);
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Services.prefs.clearUserPref(INT_TEST_PREF);
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Services.prefs.clearUserPref(STRING_TEST_PREF);
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});
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