toolkit/components/startup/tests/browser/browser_Telemetry_timestamp_test.js


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"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."
  );
});