import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/workers/test/bug1047663_worker.sjs

@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const WORKER_1 = `
+  "use strict";
+
+  self.onmessage = function () {
+    postMessage("one");
+  };
+`;
+
+const WORKER_2 = `
+  "use strict";
+
+  self.onmessage = function () {
+    postMessage("two");
+  };
+`;
+
+function handleRequest(request, response) {
+  let count = getState("count");
+  if (count === "") {
+    count = "1";
+  }
+
+  // This header is necessary for the cache to trigger.
+  response.setHeader("Cache-control", "max-age=3600");
+
+  // If this is the first request, return the first source.
+  if (count === "1") {
+    response.write(WORKER_1);
+    setState("count", "2");
+  }
+  // For all subsequent requests, return the second source.
+  else {
+    response.write(WORKER_2);
+  }
+}