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-rw-r--r--js/xpconnect/tests/unit/test_onGarbageCollection-05.js42
1 files changed, 42 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_onGarbageCollection-05.js b/js/xpconnect/tests/unit/test_onGarbageCollection-05.js
new file mode 100644
index 0000000000..e3b5e5fd9e
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_onGarbageCollection-05.js
@@ -0,0 +1,42 @@
+// Test that the onGarbageCollection hook reports its gc cycle's number (aka the
+// major GC number) and that it is monotonically increasing.
+
+const root = newGlobal();
+const dbg = new Debugger();
+const wrappedRoot = dbg.addDebuggee(root)
+
+Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+registerCleanupFunction(() => {
+ Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+});
+
+function run_test() {
+ do_test_pending();
+
+ let numFired = 0;
+ let lastGCCycleNumber = undefined;
+
+ (function loop() {
+ if (numFired == 10) {
+ dbg.memory.onGarbageCollection = undefined;
+ dbg.enabled = false;
+ return void do_test_finished();
+ }
+
+ dbg.memory.onGarbageCollection = data => {
+ print("onGarbageCollection: " + uneval(data));
+
+ if (numFired != 0) {
+ equal(typeof lastGCCycleNumber, "number");
+ equal(data.gcCycleNumber - lastGCCycleNumber, 1);
+ }
+
+ numFired++;
+ lastGCCycleNumber = data.gcCycleNumber;
+
+ executeSoon(loop);
+ };
+
+ root.eval("gc(this)");
+ }());
+}