1 files changed, 58 insertions, 0 deletions
diff --git a/toolkit/components/antitracking/test/browser/browser_partitionedDedicatedWorker.js b/toolkit/components/antitracking/test/browser/browser_partitionedDedicatedWorker.js
new file mode 100644
index 0000000000..55156beca3
--- /dev/null
+++ b/toolkit/components/antitracking/test/browser/browser_partitionedDedicatedWorker.js
@@ -0,0 +1,58 @@
+PartitionedStorageHelper.runTestInNormalAndPrivateMode(
+  "DedicatedWorkers",
+  async (win3rdParty, win1stParty) => {
+    // Set one cookie to the first party context.
+    await win1stParty.fetch("cookies.sjs?first").then(r => r.text());
+
+    // Create a dedicated worker in the first-party context.
+    let firstPartyWorker = new win1stParty.Worker("dedicatedWorker.js");
+
+    // Verify that the cookie from the first-party worker.
+    await new Promise(resolve => {
+      firstPartyWorker.addEventListener("message", msg => {
+        is(
+          msg.data,
+          "cookie:foopy=first",
+          "Got the expected first-party cookie."
+        );
+        resolve();
+      });
+
+      firstPartyWorker.postMessage("getCookies");
+    });
+
+    // Set one cookie to the third-party context.
+    await win3rdParty
+      .fetch("cookies.sjs?3rd;Partitioned;Secure")
+      .then(r => r.text());
+
+    // Create a dedicated worker in the third-party context.
+    let thirdPartyWorker = new win3rdParty.Worker("dedicatedWorker.js");
+
+    // Verify that the third-party worker cannot access first-party cookies.
+    await new Promise(resolve => {
+      thirdPartyWorker.addEventListener("message", msg => {
+        is(
+          msg.data,
+          "cookie:foopy=3rd",
+          "Got the expected third-party cookie."
+        );
+        resolve();
+      });
+
+      thirdPartyWorker.postMessage("getCookies");
+    });
+
+    firstPartyWorker.terminate();
+    thirdPartyWorker.terminate();
+  },
+
+  async _ => {
+    await new Promise(resolve => {
+      Services.clearData.deleteData(Ci.nsIClearDataService.CLEAR_ALL, () =>
+        resolve()
+      );
+    });
+  },
+  []
+);