1 files changed, 75 insertions, 0 deletions
diff --git a/dom/tests/mochitest/general/workerStoragePrevented.js b/dom/tests/mochitest/general/workerStoragePrevented.js
new file mode 100644
index 0000000000..467cc09113
--- /dev/null
+++ b/dom/tests/mochitest/general/workerStoragePrevented.js
@@ -0,0 +1,75 @@
+// Unfortunately, workers can't share the code from storagePermissionsUtils.
+// These are basic mechanisms for communicating to the test runner.
+
+function ok(condition, text) {
+  if (!condition) {
+    self.postMessage("FAILURE: " + text);
+  } else {
+    self.postMessage(text);
+  }
+}
+
+function finishTest() {
+  self.postMessage("done");
+  self.close();
+}
+
+// Workers don't have access to localstorage or sessionstorage
+ok(typeof self.localStorage == "undefined", "localStorage should be undefined");
+ok(
+  typeof self.sessionStorage == "undefined",
+  "sessionStorage should be undefined"
+);
+
+// Make sure that we can't access indexedDB
+try {
+  indexedDB;
+  ok(false, "WORKER getting indexedDB should have thrown");
+} catch (e) {
+  ok(true, "WORKER getting indexedDB threw");
+}
+
+// Make sure that we can't access caches
+try {
+  var promise = caches.keys();
+  ok(true, "WORKER getting caches didn't throw");
+
+  promise.then(
+    function () {
+      ok(false, "WORKER The promise should have rejected");
+      workerTest();
+    },
+    function () {
+      ok(true, "WORKER The promise was rejected");
+      workerTest();
+    }
+  );
+} catch (e) {
+  ok(
+    location.protocol !== "https:",
+    "WORKER getting caches should not have thrown"
+  );
+  workerTest();
+}
+
+// Try to spawn an inner worker, and make sure that it also can't access storage
+function workerTest() {
+  if (location.hash == "#inner") {
+    // Don't recurse infinitely, if we are the inner worker, don't spawn another
+    finishTest();
+    return;
+  }
+  // Create the inner worker, and listen for test messages from it
+  var worker = new Worker("workerStoragePrevented.js#inner");
+  worker.addEventListener("message", function (e) {
+    if (e.data == "done") {
+      finishTest();
+      return;
+    }
+
+    ok(
+      !e.data.match(/^FAILURE/),
+      e.data + " (WORKER = workerStoragePrevented.js#inner)"
+    );
+  });
+}