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comparison: js/xpconnect/tests/unit/test_tearoffs.js
js/xpconnect/tests/unit/test_tearoffs.js
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| -1:000000000000 | 0:119a6fa3749f |
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| 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 const Cc = Components.classes; | |
| 6 const Ci = Components.interfaces; | |
| 7 | |
| 8 function run_test() { | |
| 9 | |
| 10 // Load the component manifest containing our test interface implementations. | |
| 11 Components.manager.autoRegister(do_get_file('../components/js/xpctest.manifest')); | |
| 12 | |
| 13 // Shortcut the interfaces we're using. | |
| 14 var ifs = { | |
| 15 a: Ci['nsIXPCTestInterfaceA'], | |
| 16 b: Ci['nsIXPCTestInterfaceB'], | |
| 17 c: Ci['nsIXPCTestInterfaceC'] | |
| 18 }; | |
| 19 | |
| 20 // Shortcut the class we're instantiating. This implements all three interfaces. | |
| 21 var cls = Cc["@mozilla.org/js/xpc/test/js/TestInterfaceAll;1"]; | |
| 22 | |
| 23 // Run through the logic a few times. | |
| 24 for (i = 0; i < 2; ++i) | |
| 25 play_with_tearoffs(ifs, cls); | |
| 26 } | |
| 27 | |
| 28 function play_with_tearoffs(ifs, cls) { | |
| 29 | |
| 30 // Allocate a bunch of objects, QI-ed to B. | |
| 31 var instances = []; | |
| 32 for (var i = 0; i < 300; ++i) | |
| 33 instances.push(cls.createInstance(ifs.b)); | |
| 34 | |
| 35 // Nothing to collect. | |
| 36 gc(); | |
| 37 | |
| 38 // QI them to A. | |
| 39 instances.forEach(function(v, i, a) { v.QueryInterface(ifs.a); }); | |
| 40 | |
| 41 // QI them to C. | |
| 42 instances.forEach(function(v, i, a) { v.QueryInterface(ifs.c); }); | |
| 43 | |
| 44 // Check | |
| 45 do_check_true('name' in instances[10], 'Have the prop from A/B'); | |
| 46 do_check_true('someInteger' in instances[10], 'Have the prop from C'); | |
| 47 | |
| 48 // Grab tearoff reflections for a and b. | |
| 49 var aTearOffs = instances.map(function(v, i, a) { return v.nsIXPCTestInterfaceA; } ); | |
| 50 var bTearOffs = instances.map(function(v, i, a) { return v.nsIXPCTestInterfaceB; } ); | |
| 51 | |
| 52 // Check | |
| 53 do_check_true('name' in aTearOffs[1], 'Have the prop from A'); | |
| 54 do_check_true(!('someInteger' in aTearOffs[1]), 'Dont have the prop from C'); | |
| 55 | |
| 56 // Nothing to collect. | |
| 57 gc(); | |
| 58 | |
| 59 // Null out every even instance pointer. | |
| 60 for (var i = 0; i < instances.length; ++i) | |
| 61 if (i % 2 == 0) | |
| 62 instances[i] = null; | |
| 63 | |
| 64 // Nothing to collect, since we still have the A and B tearoff reflections. | |
| 65 gc(); | |
| 66 | |
| 67 // Null out A tearoff reflections that are a multiple of 3. | |
| 68 for (var i = 0; i < aTearOffs.length; ++i) | |
| 69 if (i % 3 == 0) | |
| 70 aTearOffs[i] = null; | |
| 71 | |
| 72 // Nothing to collect, since we still have the B tearoff reflections. | |
| 73 gc(); | |
| 74 | |
| 75 // Null out B tearoff reflections that are a multiple of 5. | |
| 76 for (var i = 0; i < bTearOffs.length; ++i) | |
| 77 if (i % 5 == 0) | |
| 78 bTearOffs[i] = null; | |
| 79 | |
| 80 // This should collect every 30th object (indices that are multiples of 2, 3, and 5). | |
| 81 gc(); | |
| 82 | |
| 83 // Kill the b tearoffs entirely. | |
| 84 bTearOffs = 0; | |
| 85 | |
| 86 // Collect more. | |
| 87 gc(); | |
| 88 | |
| 89 // Get C tearoffs. | |
| 90 var cTearOffs = instances.map(function(v, i, a) { return v ? v.nsIXPCTestInterfaceC : null; } ); | |
| 91 | |
| 92 // Check. | |
| 93 do_check_true(!('name' in cTearOffs[1]), 'Dont have the prop from A'); | |
| 94 do_check_true('someInteger' in cTearOffs[1], 'have the prop from C'); | |
| 95 | |
| 96 // Null out the a tearoffs. | |
| 97 aTearOffs = null; | |
| 98 | |
| 99 // Collect all even indices. | |
| 100 gc(); | |
| 101 | |
| 102 // Collect all indices. | |
| 103 instances = null; | |
| 104 gc(); | |
| 105 | |
| 106 // Give ourselves a pat on the back. :-) | |
| 107 do_check_true(true, "Got all the way through without crashing!"); | |
| 108 } |
