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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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diff --git a/js/xpconnect/tests/unit/test_tearoffs.js b/js/xpconnect/tests/unit/test_tearoffs.js
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+/* 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/. */
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+
+function run_test() {
+
+ // Load the component manifest containing our test interface implementations.
+ Components.manager.autoRegister(do_get_file('../components/js/xpctest.manifest'));
+
+ // Shortcut the interfaces we're using.
+ var ifs = {
+ a: Ci['nsIXPCTestInterfaceA'],
+ b: Ci['nsIXPCTestInterfaceB'],
+ c: Ci['nsIXPCTestInterfaceC']
+ };
+
+ // Shortcut the class we're instantiating. This implements all three interfaces.
+ var cls = Cc["@mozilla.org/js/xpc/test/js/TestInterfaceAll;1"];
+
+ // Run through the logic a few times.
+ for (i = 0; i < 2; ++i)
+ play_with_tearoffs(ifs, cls);
+}
+
+function play_with_tearoffs(ifs, cls) {
+
+ // Allocate a bunch of objects, QI-ed to B.
+ var instances = [];
+ for (var i = 0; i < 300; ++i)
+ instances.push(cls.createInstance(ifs.b));
+
+ // Nothing to collect.
+ gc();
+
+ // QI them to A.
+ instances.forEach(function(v, i, a) { v.QueryInterface(ifs.a); });
+
+ // QI them to C.
+ instances.forEach(function(v, i, a) { v.QueryInterface(ifs.c); });
+
+ // Check
+ do_check_true('name' in instances[10], 'Have the prop from A/B');
+ do_check_true('someInteger' in instances[10], 'Have the prop from C');
+
+ // Grab tearoff reflections for a and b.
+ var aTearOffs = instances.map(function(v, i, a) { return v.nsIXPCTestInterfaceA; } );
+ var bTearOffs = instances.map(function(v, i, a) { return v.nsIXPCTestInterfaceB; } );
+
+ // Check
+ do_check_true('name' in aTearOffs[1], 'Have the prop from A');
+ do_check_true(!('someInteger' in aTearOffs[1]), 'Dont have the prop from C');
+
+ // Nothing to collect.
+ gc();
+
+ // Null out every even instance pointer.
+ for (var i = 0; i < instances.length; ++i)
+ if (i % 2 == 0)
+ instances[i] = null;
+
+ // Nothing to collect, since we still have the A and B tearoff reflections.
+ gc();
+
+ // Null out A tearoff reflections that are a multiple of 3.
+ for (var i = 0; i < aTearOffs.length; ++i)
+ if (i % 3 == 0)
+ aTearOffs[i] = null;
+
+ // Nothing to collect, since we still have the B tearoff reflections.
+ gc();
+
+ // Null out B tearoff reflections that are a multiple of 5.
+ for (var i = 0; i < bTearOffs.length; ++i)
+ if (i % 5 == 0)
+ bTearOffs[i] = null;
+
+ // This should collect every 30th object (indices that are multiples of 2, 3, and 5).
+ gc();
+
+ // Kill the b tearoffs entirely.
+ bTearOffs = 0;
+
+ // Collect more.
+ gc();
+
+ // Get C tearoffs.
+ var cTearOffs = instances.map(function(v, i, a) { return v ? v.nsIXPCTestInterfaceC : null; } );
+
+ // Check.
+ do_check_true(!('name' in cTearOffs[1]), 'Dont have the prop from A');
+ do_check_true('someInteger' in cTearOffs[1], 'have the prop from C');
+
+ // Null out the a tearoffs.
+ aTearOffs = null;
+
+ // Collect all even indices.
+ gc();
+
+ // Collect all indices.
+ instances = null;
+ gc();
+
+ // Give ourselves a pat on the back. :-)
+ do_check_true(true, "Got all the way through without crashing!");
+}