browser/modules/test/browser/browser_UsageTelemetry_content_aboutRestartRequired.js


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"use strict";

const SCALAR_BUILDID_MISMATCH = "dom.contentprocess.buildID_mismatch";

add_task(async function test_aboutRestartRequired() {
  const { TabCrashHandler } = ChromeUtils.importESModule(
    "resource:///modules/ContentCrashHandlers.sys.mjs"
  );

  // Let's reset the counts.
  Services.telemetry.clearScalars();

  let scalars = TelemetryTestUtils.getProcessScalars("parent");

  // Check preconditions
  is(
    scalars[SCALAR_BUILDID_MISMATCH],
    undefined,
    "Build ID mismatch count should be undefined"
  );

  // Simulate buildID mismatch
  TabCrashHandler._crashedTabCount = 1;
  TabCrashHandler.sendToRestartRequiredPage(gBrowser.selectedTab.linkedBrowser);

  scalars = TelemetryTestUtils.getProcessScalars("parent");

  is(
    scalars[SCALAR_BUILDID_MISMATCH],
    1,
    "Build ID mismatch count should be 1."
  );
});