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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /modules/libpref/test/unit_ipc/test_large_pref.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/libpref/test/unit_ipc/test_large_pref.js')
-rw-r--r-- | modules/libpref/test/unit_ipc/test_large_pref.js | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/modules/libpref/test/unit_ipc/test_large_pref.js b/modules/libpref/test/unit_ipc/test_large_pref.js new file mode 100644 index 0000000000..79c1330c36 --- /dev/null +++ b/modules/libpref/test/unit_ipc/test_large_pref.js @@ -0,0 +1,104 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Large preferences should not be set in the child process. +// Non-string preferences are not tested here, because their behavior +// should not be affected by this filtering. +// + +function isParentProcess() { + return Services.appinfo.processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT; +} + +function makeBuffer(length) { + let string = "x"; + while (string.length < length) { + string = string + string; + } + if (string.length > length) { + string = string.substring(length - string.length); + } + return string; +} + +// from prefapi.h +const MAX_ADVISABLE_PREF_LENGTH = 4 * 1024; + +const largeString = makeBuffer(MAX_ADVISABLE_PREF_LENGTH + 1); +const smallString = makeBuffer(4); + +const testValues = [ + { name: "None", value: undefined }, + { name: "Small", value: smallString }, + { name: "Large", value: largeString }, +]; + +function prefName(def, user) { + return "Test.IPC.default" + def.name + "User" + user.name; +} + +function expectedPrefValue(def, user) { + if (user.value) { + return user.value; + } + return def.value; +} + +function run_test() { + const pb = Services.prefs; + let defaultBranch = pb.getDefaultBranch(""); + + let isParent = isParentProcess(); + if (isParent) { + // Preferences with large values will still appear in the shared memory + // snapshot that we share with all processes. They should not, however, be + // sent with the list of changes on top of the snapshot. + // + // So, make sure we've generated the initial snapshot before we set the + // preference values by launching a child process with an empty test. + sendCommand(""); + + // Set all combinations of none, small and large, for default and user prefs. + for (let def of testValues) { + for (let user of testValues) { + let currPref = prefName(def, user); + if (def.value) { + defaultBranch.setCharPref(currPref, def.value); + } + if (user.value) { + pb.setCharPref(currPref, user.value); + } + } + } + + run_test_in_child("test_large_pref.js"); + } + + // Check that each preference is set or not set, as appropriate. + for (let def of testValues) { + for (let user of testValues) { + if (!def.value && !user.value) { + continue; + } + let pref_name = prefName(def, user); + if (isParent || (def.name != "Large" && user.name != "Large")) { + Assert.equal(pb.getCharPref(pref_name), expectedPrefValue(def, user)); + } else { + // This is the child, and either the default or user value is + // large, so the preference should not be set. + let prefExists; + try { + let val = pb.getCharPref(pref_name); + prefExists = val.length > 128; + } catch (e) { + prefExists = false; + } + ok( + !prefExists, + "Pref " + pref_name + " should not be set in the child" + ); + } + } + } +} |