1 files changed, 33 insertions, 0 deletions
diff --git a/browser/modules/test/browser/browser_UsageTelemetry_content_aboutRestartRequired.js b/browser/modules/test/browser/browser_UsageTelemetry_content_aboutRestartRequired.js
new file mode 100644
index 0000000000..359bfa9c69
--- /dev/null
+++ b/browser/modules/test/browser/browser_UsageTelemetry_content_aboutRestartRequired.js
@@ -0,0 +1,33 @@
+"use strict";
+
+const SCALAR_BUILDID_MISMATCH = "dom.contentprocess.buildID_mismatch";
+
+add_task(async function test_aboutRestartRequired() {
+  const { TabCrashHandler } = ChromeUtils.import(
+    "resource:///modules/ContentCrashHandlers.jsm"
+  );
+
+  // 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."
+  );
+});