1 files changed, 46 insertions, 0 deletions
diff --git a/dom/base/test/browser_page_load_event_telemetry.js b/dom/base/test/browser_page_load_event_telemetry.js
new file mode 100644
index 0000000000..2a8377eacc
--- /dev/null
+++ b/dom/base/test/browser_page_load_event_telemetry.js
@@ -0,0 +1,46 @@
+"use strict";
+
+const { TelemetryTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TelemetryTestUtils.sys.mjs"
+);
+
+const ALL_CHANNELS = Ci.nsITelemetry.DATASET_ALL_CHANNELS;
+
+add_task(async function() {
+  let tab = await BrowserTestUtils.openNewForegroundTab({
+    gBrowser,
+    waitForLoad: true,
+  });
+
+  let browser = tab.linkedBrowser;
+
+  // Reset event counts.
+  Services.telemetry.clearEvents();
+  TelemetryTestUtils.assertNumberOfEvents(0);
+
+  // Add checks for pageload ping and pageload event
+  let pingSubmitted = false;
+  GleanPings.pageload.testBeforeNextSubmit(reason => {
+    pingSubmitted = true;
+    Assert.equal(reason, "threshold");
+    let record = Glean.perf.pageLoad.testGetValue();
+    Assert.greaterOrEqual(
+      record.length,
+      30,
+      "Should have at least 30 page load events"
+    );
+  });
+
+  // Perform page load 30 times to trigger the ping being sent
+  for (let i = 0; i < 30; i++) {
+    BrowserTestUtils.loadURI(browser, "https://example.com");
+    await BrowserTestUtils.browserLoaded(browser);
+  }
+
+  await BrowserTestUtils.waitForCondition(
+    () => pingSubmitted,
+    "Page load ping should have been submitted."
+  );
+
+  BrowserTestUtils.removeTab(tab);
+});