1 files changed, 35 insertions, 0 deletions
diff --git a/toolkit/components/startup/tests/browser/browser_Telemetry_timestamp_test.js b/toolkit/components/startup/tests/browser/browser_Telemetry_timestamp_test.js
new file mode 100644
index 0000000000..f009f2c941
--- /dev/null
+++ b/toolkit/components/startup/tests/browser/browser_Telemetry_timestamp_test.js
@@ -0,0 +1,35 @@
+"use strict";
+
+const { TelemetryController } = ChromeUtils.importESModule(
+  "resource://gre/modules/TelemetryController.sys.mjs"
+);
+const { TelemetrySession } = ChromeUtils.importESModule(
+  "resource://gre/modules/TelemetrySession.sys.mjs"
+);
+
+add_task(async function test() {
+  let now = Services.telemetry.msSinceProcessStart();
+  let payload = TelemetrySession.getPayload("main");
+
+  // Check the first_paint scalar.
+  ok(
+    "scalars" in payload.processes.parent,
+    "Scalars are present in the payload."
+  );
+  ok(
+    "timestamps.first_paint" in payload.processes.parent.scalars,
+    "The first_paint timestamp is present in the payload."
+  );
+  Assert.greater(
+    payload.processes.parent.scalars["timestamps.first_paint"],
+    0,
+    "first_paint scalar is greater than 0."
+  );
+  Assert.greater(now, 0, "Browser test runtime is greater than zero.");
+  // Check that the first_paint scalar is less than the current time.
+  Assert.greater(
+    now,
+    payload.processes.parent.scalars["timestamps.first_paint"],
+    "first_paint is less than total browser test runtime."
+  );
+});