1 files changed, 19 insertions, 0 deletions
diff --git a/toolkit/components/glean/tests/xpcshell/test_MillionQ.js b/toolkit/components/glean/tests/xpcshell/test_MillionQ.js
new file mode 100644
index 0000000000..d98e73b451
--- /dev/null
+++ b/toolkit/components/glean/tests/xpcshell/test_MillionQ.js
@@ -0,0 +1,19 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(function test_queue_longer_than_1k() {
+  // FOG needs a profile directory to put its data in.
+  do_get_profile();
+
+  // Before init, try and fill the preinit queue with > 1000 tasks.
+  const kIterations = 2000;
+  for (let _i = 0; _i < kIterations; _i++) {
+    Glean.testOnly.badCode.add(1);
+  }
+
+  Services.fog.initializeFOG();
+
+  Assert.equal(kIterations, Glean.testOnly.badCode.testGetValue());
+});