1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/workers/same-site-cookies/third-party.none.tentative.sub.https.window.js b/testing/web-platform/tests/workers/same-site-cookies/third-party.none.tentative.sub.https.window.js
new file mode 100644
index 0000000000..b91b9d7ab2
--- /dev/null
+++ b/testing/web-platform/tests/workers/same-site-cookies/third-party.none.tentative.sub.https.window.js
@@ -0,0 +1,24 @@
+// META: script=/resources/testdriver.js
+// META: script=/resources/testdriver-vendor.js
+
+'use strict';
+
+// Here's the set-up for this test:
+// Step 1 (top-frame) Set up listener for "DidStart" message and open cross-site iframe.
+// Step 2 (sub-frame) Open iframe same-site to top-frame.
+// Step 3 (sub-sub-frame) Set up listener for message and start worker.
+// Step 4 (worker) Send "DidStart" message to iframe.
+// Step 5 (sub-sub-frame) Receive message and pass on to window.
+// Step 6 (top-frame) Receive "DidStart" message and cleanup.
+
+async_test(t => {
+  // Step 1
+  window.addEventListener("message", t.step_func(e => {
+    // Step 6
+    assert_equals(e.data, "DidStart", "Worker should have started");
+    t.done();
+  }));
+  let iframe = document.createElement("iframe");
+  iframe.src = "https://{{hosts[alt][]}}:{{ports[https][0]}}/workers/same-site-cookies/resources/iframe.sub.html?type=none";
+  document.body.appendChild(iframe);
+}, "Check SharedWorker sameSiteCookies option none for third-party");