The Tor Browser / file comparison
comparison: js/xpconnect/tests/unit/test_js_weak_references.js
js/xpconnect/tests/unit/test_js_weak_references.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:51e1ce191e4e |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 /* See https://bugzilla.mozilla.org/show_bug.cgi?id=317304 */ | |
| 6 | |
| 7 function run_test() | |
| 8 { | |
| 9 // Bug 712649: Calling getWeakReference(null) should work. | |
| 10 try { | |
| 11 var nullWeak = Components.utils.getWeakReference(null); | |
| 12 do_check_true(nullWeak.get() === null); | |
| 13 } catch (e) { | |
| 14 do_check_true(false); | |
| 15 } | |
| 16 | |
| 17 var obj = { num: 5, str: 'foo' }; | |
| 18 var weak = Components.utils.getWeakReference(obj); | |
| 19 | |
| 20 do_check_true(weak.get() === obj); | |
| 21 do_check_true(weak.get().num == 5); | |
| 22 do_check_true(weak.get().str == 'foo'); | |
| 23 | |
| 24 // Force garbage collection | |
| 25 Components.utils.forceGC(); | |
| 26 | |
| 27 // obj still references the object, so it should still be accessible via weak | |
| 28 do_check_true(weak.get() === obj); | |
| 29 do_check_true(weak.get().num == 5); | |
| 30 do_check_true(weak.get().str == 'foo'); | |
| 31 | |
| 32 // Clear obj's reference to the object and force garbage collection. To make | |
| 33 // sure that there are no instances of obj stored in the registers or on the | |
| 34 // native stack and the conservative GC would not find it we force the same | |
| 35 // code paths that we used for the initial allocation. | |
| 36 obj = { num: 6, str: 'foo2' }; | |
| 37 var weak2 = Components.utils.getWeakReference(obj); | |
| 38 do_check_true(weak2.get() === obj); | |
| 39 | |
| 40 Components.utils.forceGC(); | |
| 41 | |
| 42 // The object should have been garbage collected and so should no longer be | |
| 43 // accessible via weak | |
| 44 do_check_true(weak.get() === null); | |
| 45 } |
