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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 /js/xpconnect/tests/unit/test_js_weak_references.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 'js/xpconnect/tests/unit/test_js_weak_references.js')
-rw-r--r-- | js/xpconnect/tests/unit/test_js_weak_references.js | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_js_weak_references.js b/js/xpconnect/tests/unit/test_js_weak_references.js new file mode 100644 index 0000000000..2603f24ee2 --- /dev/null +++ b/js/xpconnect/tests/unit/test_js_weak_references.js @@ -0,0 +1,45 @@ +/* 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/. */ + +/* See https://bugzilla.mozilla.org/show_bug.cgi?id=317304 */ + +function run_test() +{ + // Bug 712649: Calling getWeakReference(null) should work. + try { + var nullWeak = Cu.getWeakReference(null); + Assert.ok(nullWeak.get() === null); + } catch (e) { + Assert.ok(false); + } + + var obj = { num: 5, str: 'foo' }; + var weak = Cu.getWeakReference(obj); + + Assert.ok(weak.get() === obj); + Assert.ok(weak.get().num == 5); + Assert.ok(weak.get().str == 'foo'); + + // Force garbage collection + Cu.forceGC(); + + // obj still references the object, so it should still be accessible via weak + Assert.ok(weak.get() === obj); + Assert.ok(weak.get().num == 5); + Assert.ok(weak.get().str == 'foo'); + + // Clear obj's reference to the object and force garbage collection. To make + // sure that there are no instances of obj stored in the registers or on the + // native stack and the conservative GC would not find it we force the same + // code paths that we used for the initial allocation. + obj = { num: 6, str: 'foo2' }; + var weak2 = Cu.getWeakReference(obj); + Assert.ok(weak2.get() === obj); + + Cu.forceGC(); + + // The object should have been garbage collected and so should no longer be + // accessible via weak + Assert.ok(weak.get() === null); +} |