1 files changed, 50 insertions, 0 deletions
diff --git a/devtools/client/performance/test/browser_perf-telemetry-04.js b/devtools/client/performance/test/browser_perf-telemetry-04.js
new file mode 100644
index 000000000..362b54714
--- /dev/null
+++ b/devtools/client/performance/test/browser_perf-telemetry-04.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+/**
+ * Tests that the performance telemetry module records events at appropriate times.
+ */
+
+const { SIMPLE_URL } = require("devtools/client/performance/test/helpers/urls");
+const { initPerformanceInTab, initConsoleInNewTab, teardownToolboxAndRemoveTab } = require("devtools/client/performance/test/helpers/panel-utils");
+const { waitForRecordingStartedEvents, waitForRecordingStoppedEvents } = require("devtools/client/performance/test/helpers/actions");
+
+add_task(function* () {
+  let { target, console } = yield initConsoleInNewTab({
+    url: SIMPLE_URL,
+    win: window
+  });
+
+  let { panel } = yield initPerformanceInTab({ tab: target.tab });
+  let { PerformanceController } = panel.panelWin;
+
+  let telemetry = PerformanceController._telemetry;
+  let logs = telemetry.getLogs();
+  let DURATION = "DEVTOOLS_PERFTOOLS_RECORDING_DURATION_MS";
+  let CONSOLE_COUNT = "DEVTOOLS_PERFTOOLS_CONSOLE_RECORDING_COUNT";
+  let FEATURES = "DEVTOOLS_PERFTOOLS_RECORDING_FEATURES_USED";
+
+  let started = waitForRecordingStartedEvents(panel, {
+    // only emitted for manual recordings
+    skipWaitingForBackendReady: true
+  });
+  yield console.profile("rust");
+  yield started;
+
+  let stopped = waitForRecordingStoppedEvents(panel, {
+    // only emitted for manual recordings
+    skipWaitingForBackendReady: true
+  });
+  yield console.profileEnd("rust");
+  yield stopped;
+
+  is(logs[DURATION].length, 1, `There is one entry for ${DURATION}.`);
+  ok(logs[DURATION].every(d => typeof d === "number"),
+     `Every ${DURATION} entry is a number.`);
+  is(logs[CONSOLE_COUNT].length, 1, `There is one entry for ${CONSOLE_COUNT}.`);
+  is(logs[FEATURES].length, 4,
+     `There is one recording worth of entries for ${FEATURES}.`);
+
+  yield teardownToolboxAndRemoveTab(panel);
+});