1 files changed, 70 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/anonymous-iframe/worker-cookies.tentative.https.window.js b/testing/web-platform/tests/html/anonymous-iframe/worker-cookies.tentative.https.window.js
new file mode 100644
index 0000000000..8c25306baf
--- /dev/null
+++ b/testing/web-platform/tests/html/anonymous-iframe/worker-cookies.tentative.https.window.js
@@ -0,0 +1,70 @@
+// META: timeout=long
+// META: variant=?worker=dedicated_worker
+// META: variant=?worker=shared_worker
+// META: variant=?worker=service_worker
+// META: script=/common/get-host-info.sub.js
+// META: script=/common/utils.js
+// META: script=/common/dispatcher/dispatcher.js
+// META: script=/html/cross-origin-embedder-policy/credentialless/resources/common.js
+// META: script=./resources/common.js
+
+// Execute the same set of tests for every type of worker.
+// - DedicatedWorkers
+// - SharedWorkers
+// - ServiceWorkers.
+const params = new URLSearchParams(document.location.search);
+const worker_param = params.get("worker") || "dedicated_worker";
+
+const cookie_key = token();
+const cookie_value = "cookie_value";
+const cookie_origin = get_host_info().HTTPS_REMOTE_ORIGIN;
+
+// Create worker spawned from `context` and return its uuid.
+const workerFrom = context => {
+  const reply = token();
+  send(context, `
+    for(deps of [
+      "/common/utils.js",
+      "/resources/testharness.js",
+      "/html/cross-origin-embedder-policy/credentialless/resources/common.js",
+    ]) {
+      await new Promise(resolve => {
+        const script = document.createElement("script");
+        script.src = deps;
+        script.onload = resolve;
+        document.body.appendChild(script);
+      });
+    }
+
+    const worker_constructor = environments["${worker_param}"];
+    const headers = "";
+    const [worker, error] = worker_constructor(headers);
+    send("${reply}", worker);
+  `);
+  return receive(reply);
+};
+
+// Set a cookie from a top-level document.
+promise_test(async test => {
+  await setCookie(cookie_origin, cookie_key, cookie_value);
+}, "set cookies");
+
+// Control: iframe is not credentialless. The worker can access cookies.
+promise_test(async test => {
+  const headers = token();
+  send(await workerFrom(newIframe(cookie_origin)), `
+    fetch("${showRequestHeaders(cookie_origin, headers)}");
+  `);
+  const cookie = parseCookies(JSON.parse(await receive(headers)));
+  assert_equals(cookie[cookie_key], cookie_value)
+}, "Worker spawned from normal iframe can access global cookies");
+
+// Experiment: iframe is credentialless.
+promise_test(async test => {
+  const headers = token();
+  send(await workerFrom(newIframeCredentialless(cookie_origin)), `
+    fetch("${showRequestHeaders(cookie_origin, headers)}");
+  `);
+  const cookie = parseCookies(JSON.parse(await receive(headers)));
+  assert_equals(cookie[cookie_key], undefined)
+}, "Worker spawned from credentialless iframe can't access global cookies");