1 files changed, 28 insertions, 0 deletions
diff --git a/toolkit/components/glean/tests/xpcshell/test_GleanExperiments.js b/toolkit/components/glean/tests/xpcshell/test_GleanExperiments.js
new file mode 100644
index 0000000000..cf8871e9d1
--- /dev/null
+++ b/toolkit/components/glean/tests/xpcshell/test_GleanExperiments.js
@@ -0,0 +1,28 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// FOG needs a profile directory to put its data in.
+do_get_profile();
+
+// We need to initialize it once, otherwise operations will be stuck in the pre-init queue.
+Services.fog.initializeFOG();
+
+add_task(function test_fog_experiment_annotations() {
+  const id = "my-experiment-id";
+  const branch = "my-branch";
+  const extra = { extra_key: "extra_value" };
+  Services.fog.setExperimentActive(id, branch, extra);
+
+  let data = Services.fog.testGetExperimentData(id);
+  Assert.equal(data.branch, branch);
+  Assert.deepEqual(data.extra, extra);
+
+  // Unknown id gets nothing.
+  Assert.equal(undefined, Services.fog.testGetExperimentData(id + id));
+
+  // Inactive id gets nothing.
+  Services.fog.setExperimentInactive(id);
+  Assert.equal(undefined, Services.fog.testGetExperimentData(id));
+});