1 files changed, 24 insertions, 0 deletions
diff --git a/testing/xpcshell/example/unit/test_get_idle.js b/testing/xpcshell/example/unit/test_get_idle.js
new file mode 100644
index 0000000000..ea01ce0247
--- /dev/null
+++ b/testing/xpcshell/example/unit/test_get_idle.js
@@ -0,0 +1,24 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+function run_test() {
+  print("Init the fake idle service and check its identity.");
+  let fakeIdleService = Cc["@mozilla.org/widget/useridleservice;1"].getService(
+    Ci.nsIUserIdleService
+  );
+  try {
+    fakeIdleService.QueryInterface(Ci.nsIFactory);
+  } catch (ex) {
+    do_throw("The fake idle service implements nsIFactory.");
+  }
+  // We need at least one PASS, thus sanity check the idle time.
+  Assert.equal(fakeIdleService.idleTime, 0);
+
+  print("Init the real idle service and check its identity.");
+  let realIdleService = do_get_idle();
+  try {
+    realIdleService.QueryInterface(Ci.nsIFactory);
+    do_throw("The real idle service does not implement nsIFactory.");
+  } catch (ex) {}
+}