1 files changed, 22 insertions, 0 deletions
diff --git a/modules/libpref/test/unit_ipc/test_existing_prefs.js b/modules/libpref/test/unit_ipc/test_existing_prefs.js
new file mode 100644
index 0000000000..78cfdcd151
--- /dev/null
+++ b/modules/libpref/test/unit_ipc/test_existing_prefs.js
@@ -0,0 +1,22 @@
+const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
+
+function isParentProcess() {
+  let appInfo = Cc["@mozilla.org/xre/app-info;1"];
+  return (
+    !appInfo ||
+    Services.appinfo.processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT
+  );
+}
+
+function run_test() {
+  if (!isParentProcess()) {
+    do_load_child_test_harness();
+
+    var pb = Services.prefs;
+    pb.setBoolPref("Test.IPC.bool.new", true);
+    pb.setIntPref("Test.IPC.int.new", 23);
+    pb.setCharPref("Test.IPC.char.new", "hey");
+
+    run_test_in_child("test_observed_prefs.js");
+  }
+}