1 files changed, 16 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_resistFingerprinting_date_now.js b/js/xpconnect/tests/unit/test_resistFingerprinting_date_now.js
new file mode 100644
index 0000000000..1acd6c586c
--- /dev/null
+++ b/js/xpconnect/tests/unit/test_resistFingerprinting_date_now.js
@@ -0,0 +1,16 @@
+Services.prefs.setBoolPref("privacy.resistFingerprinting", true);
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("privacy.resistFingerprinting");
+});
+
+add_task(function test_sandbox_rfp() {
+  var sb = Cu.Sandbox('http://example.com');
+  var date = Cu.evalInSandbox('Date.now()', sb);
+  ok(date > 1672553000000, "Date.now() works with resistFingerprinting");
+});
+
+add_task(function test_sandbox_system() {
+  var sb = Cu.Sandbox(Services.scriptSecurityManager.getSystemPrincipal());
+  var date = Cu.evalInSandbox('Date.now()', sb);
+  ok(date > 1672553000000, "Date.now() works with systemprincipal");
+});