1 files changed, 79 insertions, 0 deletions
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js b/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js
new file mode 100644
index 0000000000..37524fbb91
--- /dev/null
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js
@@ -0,0 +1,79 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const { TelemetryController } = ChromeUtils.importESModule(
+  "resource://gre/modules/TelemetryController.sys.mjs"
+);
+const { TelemetrySession } = ChromeUtils.importESModule(
+  "resource://gre/modules/TelemetrySession.sys.mjs"
+);
+
+// The @mozilla/xre/app-info;1 XPCOM object provided by the xpcshell test harness doesn't
+// implement the nsIXULAppInfo interface, which is needed by Services and
+// TelemetrySession.sys.mjs. updateAppInfo() creates and registers a minimal mock app-info.
+const { updateAppInfo } = ChromeUtils.importESModule(
+  "resource://testing-common/AppInfo.sys.mjs"
+);
+updateAppInfo();
+
+function getSimpleMeasurementsFromTelemetryController() {
+  return TelemetrySession.getPayload().simpleMeasurements;
+}
+
+add_task(async function test_setup() {
+  // Telemetry needs the AddonManager.
+  await loadAddonManager();
+  finishAddonManagerStartup();
+  fakeIntlReady();
+  // Make profile available for |TelemetryController.testShutdown()|.
+  do_get_profile();
+
+  // Make sure we don't generate unexpected pings due to pref changes.
+  await setEmptyPrefWatchlist();
+
+  await new Promise(resolve =>
+    Services.telemetry.asyncFetchTelemetryData(resolve)
+  );
+});
+
+add_task(async function actualTest() {
+  await TelemetryController.testSetup();
+
+  // Test the module logic
+  let { TelemetryTimestamps } = ChromeUtils.importESModule(
+    "resource://gre/modules/TelemetryTimestamps.sys.mjs"
+  );
+  let now = Date.now();
+  TelemetryTimestamps.add("foo");
+  Assert.ok(TelemetryTimestamps.get().foo != null); // foo was added
+  Assert.ok(TelemetryTimestamps.get().foo >= now); // foo has a reasonable value
+
+  // Add timestamp with value
+  // Use a value far in the future since TelemetryController substracts the time of
+  // process initialization.
+  const YEAR_4000_IN_MS = 64060588800000;
+  TelemetryTimestamps.add("bar", YEAR_4000_IN_MS);
+  Assert.equal(TelemetryTimestamps.get().bar, YEAR_4000_IN_MS); // bar has the right value
+
+  // Can't add the same timestamp twice
+  TelemetryTimestamps.add("bar", 2);
+  Assert.equal(TelemetryTimestamps.get().bar, YEAR_4000_IN_MS); // bar wasn't overwritten
+
+  let threw = false;
+  try {
+    TelemetryTimestamps.add("baz", "this isn't a number");
+  } catch (ex) {
+    threw = true;
+  }
+  Assert.ok(threw); // adding non-number threw
+  Assert.equal(null, TelemetryTimestamps.get().baz); // no baz was added
+
+  // Test that the data gets added to the telemetry ping properly
+  let simpleMeasurements = getSimpleMeasurementsFromTelemetryController();
+  Assert.ok(simpleMeasurements != null); // got simple measurements from ping data
+  Assert.ok(simpleMeasurements.foo > 1); // foo was included
+  Assert.ok(simpleMeasurements.bar > 1); // bar was included
+  Assert.equal(undefined, simpleMeasurements.baz); // baz wasn't included since it wasn't added
+
+  await TelemetryController.testShutdown();
+});