1 files changed, 107 insertions, 0 deletions
diff --git a/netwerk/test/browser/browser_103_telemetry.js b/netwerk/test/browser/browser_103_telemetry.js
new file mode 100644
index 0000000000..bf0f55fc2e
--- /dev/null
+++ b/netwerk/test/browser/browser_103_telemetry.js
@@ -0,0 +1,107 @@
+"use strict";
+
+const { TelemetryTestUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/TelemetryTestUtils.sys.mjs"
+);
+
+Services.prefs.setCharPref("dom.securecontext.allowlist", "example.com");
+
+var kTest103 =
+  "http://example.com/browser/netwerk/test/browser/103_preload.html";
+var kTestNo103 =
+  "http://example.com/browser/netwerk/test/browser/no_103_preload.html";
+var kTest404 =
+  "http://example.com/browser/netwerk/test/browser/103_preload_and_404.html";
+
+add_task(async function () {
+  let hist_hints = TelemetryTestUtils.getAndClearHistogram(
+    "EH_NUM_OF_HINTS_PER_PAGE"
+  );
+  let hist_final = TelemetryTestUtils.getAndClearHistogram("EH_FINAL_RESPONSE");
+  let hist_time = TelemetryTestUtils.getAndClearHistogram(
+    "EH_TIME_TO_FINAL_RESPONSE"
+  );
+
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, kTest103, true);
+
+  // This is a 200 response with 103:
+  // EH_NUM_OF_HINTS_PER_PAGE should record 1.
+  // EH_FINAL_RESPONSE should record 1 on position 0 (R2xx).
+  // EH_TIME_TO_FINAL_RESPONSE should have a new value
+  //   (we cannot determine what the timing will be therefore we only check that
+  //    the histogram sum is > 0).
+  TelemetryTestUtils.assertHistogram(hist_hints, 1, 1);
+  TelemetryTestUtils.assertHistogram(hist_final, 0, 1);
+  const snapshot = hist_time.snapshot();
+  let found = false;
+  for (let [val] of Object.entries(snapshot.values)) {
+    if (val > 0) {
+      found = true;
+    }
+  }
+  Assert.ok(found);
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function () {
+  let hist_hints = TelemetryTestUtils.getAndClearHistogram(
+    "EH_NUM_OF_HINTS_PER_PAGE"
+  );
+  let hist_final = TelemetryTestUtils.getAndClearHistogram("EH_FINAL_RESPONSE");
+  let hist_time = TelemetryTestUtils.getAndClearHistogram(
+    "EH_TIME_TO_FINAL_RESPONSE"
+  );
+
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, kTestNo103, true);
+
+  // This is a 200 response without 103:
+  // EH_NUM_OF_HINTS_PER_PAGE should record 0.
+  // EH_FINAL_RESPONSE andd EH_TIME_TO_FINAL_RESPONSE should not be recorded.
+  TelemetryTestUtils.assertHistogram(hist_hints, 0, 1);
+  const snapshot_final = hist_final.snapshot();
+  Assert.equal(snapshot_final.sum, 0);
+  const snapshot_time = hist_time.snapshot();
+  let found = false;
+  for (let [val] of Object.entries(snapshot_time.values)) {
+    if (val > 0) {
+      found = true;
+    }
+  }
+  Assert.ok(!found);
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function () {
+  let hist_hints = TelemetryTestUtils.getAndClearHistogram(
+    "EH_NUM_OF_HINTS_PER_PAGE"
+  );
+  let hist_final = TelemetryTestUtils.getAndClearHistogram("EH_FINAL_RESPONSE");
+  let hist_time = TelemetryTestUtils.getAndClearHistogram(
+    "EH_TIME_TO_FINAL_RESPONSE"
+  );
+
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, kTest404, true);
+
+  // This is a 404 response with 103:
+  // EH_NUM_OF_HINTS_PER_PAGE and EH_TIME_TO_FINAL_RESPONSE should not be recorded.
+  // EH_FINAL_RESPONSE should record 1 on index 2 (R4xx).
+  const snapshot_hints = hist_hints.snapshot();
+  Assert.equal(snapshot_hints.sum, 0);
+  TelemetryTestUtils.assertHistogram(hist_final, 2, 1);
+  const snapshot_time = hist_time.snapshot();
+  let found = false;
+  for (let [val] of Object.entries(snapshot_time.values)) {
+    if (val > 0) {
+      found = true;
+    }
+  }
+  Assert.ok(!found);
+
+  gBrowser.removeCurrentTab();
+});
+
+add_task(async function cleanup() {
+  Services.prefs.clearUserPref("dom.securecontext.allowlist");
+});