1 files changed, 50 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/test/browser_net_telemetry_throttle_changed.js b/devtools/client/netmonitor/test/browser_net_telemetry_throttle_changed.js
new file mode 100644
index 0000000000..ee27f5de2d
--- /dev/null
+++ b/devtools/client/netmonitor/test/browser_net_telemetry_throttle_changed.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const ALL_CHANNELS = Ci.nsITelemetry.DATASET_ALL_CHANNELS;
+
+/**
+ * Test the throttle_change telemetry event.
+ */
+add_task(async function () {
+  const { monitor, toolbox } = await initNetMonitor(SIMPLE_URL, {
+    requestCount: 1,
+  });
+  info("Starting test... ");
+
+  const { document, store, windowRequire } = monitor.panelWin;
+  const Actions = windowRequire("devtools/client/netmonitor/src/actions/index");
+  store.dispatch(Actions.batchEnable(false));
+
+  // Remove all telemetry events.
+  Services.telemetry.clearEvents();
+
+  // Ensure no events have been logged
+  const snapshot = Services.telemetry.snapshotEvents(ALL_CHANNELS, true);
+  ok(!snapshot.parent, "No events have been logged for the main process");
+
+  document.getElementById("network-throttling-menu").click();
+  // Throttling menu items cannot be retrieved by id so we can't use getContextMenuItem
+  // here. Instead use querySelector on the toolbox top document, where the context menu
+  // will be rendered.
+  const item = toolbox.topWindow.document.querySelector(
+    "menuitem[label='GPRS']"
+  );
+  await BrowserTestUtils.waitForPopupEvent(item.parentNode, "shown");
+  item.parentNode.activateItem(item);
+  await monitor.panelWin.api.once(TEST_EVENTS.THROTTLING_CHANGED);
+
+  // Verify existence of the telemetry event.
+  checkTelemetryEvent(
+    {
+      mode: "GPRS",
+    },
+    {
+      method: "throttle_changed",
+    }
+  );
+
+  return teardown(monitor);
+});