1 files changed, 34 insertions, 0 deletions
diff --git a/toolkit/components/glean/tests/browser/browser_fog_gpu.js b/toolkit/components/glean/tests/browser/browser_fog_gpu.js
new file mode 100644
index 0000000000..6911ae8026
--- /dev/null
+++ b/toolkit/components/glean/tests/browser/browser_fog_gpu.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async () => {
+  if (
+    !(await ChromeUtils.requestProcInfo()).children.some(p => p.type == "gpu")
+  ) {
+    ok(
+      true,
+      'No GPU process? No test. Try again with --setpref "layers.gpu-process.force-enabled=true".'
+    );
+    return;
+  }
+  ok(true, "GPU Process found: Let's test.");
+
+  Services.fog.testResetFOG();
+
+  is(
+    null,
+    Glean.testOnlyIpc.aCounter.testGetValue(),
+    "Ensure we begin without value."
+  );
+
+  await Services.fog.testTriggerMetrics(Ci.nsIXULRuntime.PROCESS_TYPE_GPU);
+  await Services.fog.testFlushAllChildren();
+
+  is(
+    Glean.testOnlyIpc.aCounter.testGetValue(),
+    Ci.nsIXULRuntime.PROCESS_TYPE_GPU,
+    "Ensure the GPU-process-set value shows up in the parent process."
+  );
+});