1 files changed, 52 insertions, 0 deletions
diff --git a/services/fxaccounts/tests/xpcshell/test_telemetry.js b/services/fxaccounts/tests/xpcshell/test_telemetry.js
new file mode 100644
index 0000000000..3b9d318404
--- /dev/null
+++ b/services/fxaccounts/tests/xpcshell/test_telemetry.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { getFxAccountsSingleton } = ChromeUtils.importESModule(
+  "resource://gre/modules/FxAccounts.sys.mjs"
+);
+const fxAccounts = getFxAccountsSingleton();
+
+_("Misc tests for FxAccounts.telemetry");
+
+const MOCK_HASHED_UID = "00112233445566778899aabbccddeeff";
+const MOCK_DEVICE_ID = "ffeeddccbbaa99887766554433221100";
+
+add_task(function test_sanitized_uid() {
+  Services.prefs.deleteBranch(
+    "identity.fxaccounts.account.telemetry.sanitized_uid"
+  );
+
+  // Returns `null` by default.
+  Assert.equal(fxAccounts.telemetry.getSanitizedUID(), null);
+
+  // Returns provided value if set.
+  fxAccounts.telemetry._setHashedUID(MOCK_HASHED_UID);
+  Assert.equal(fxAccounts.telemetry.getSanitizedUID(), MOCK_HASHED_UID);
+
+  // Reverts to unset for falsey values.
+  fxAccounts.telemetry._setHashedUID("");
+  Assert.equal(fxAccounts.telemetry.getSanitizedUID(), null);
+});
+
+add_task(function test_sanitize_device_id() {
+  Services.prefs.deleteBranch(
+    "identity.fxaccounts.account.telemetry.sanitized_uid"
+  );
+
+  // Returns `null` by default.
+  Assert.equal(fxAccounts.telemetry.sanitizeDeviceId(MOCK_DEVICE_ID), null);
+
+  // Hashes with the sanitized UID if set.
+  // (test value here is SHA256(MOCK_DEVICE_ID + MOCK_HASHED_UID))
+  fxAccounts.telemetry._setHashedUID(MOCK_HASHED_UID);
+  Assert.equal(
+    fxAccounts.telemetry.sanitizeDeviceId(MOCK_DEVICE_ID),
+    "dd7c845006df9baa1c6d756926519c8ce12f91230e11b6057bf8ec65f9b55c1a"
+  );
+
+  // Reverts to unset for falsey values.
+  fxAccounts.telemetry._setHashedUID("");
+  Assert.equal(fxAccounts.telemetry.sanitizeDeviceId(MOCK_DEVICE_ID), null);
+});