1 files changed, 34 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/download/worker.js b/dom/serviceworkers/test/download/worker.js
new file mode 100644
index 0000000000..d96f18b34d
--- /dev/null
+++ b/dom/serviceworkers/test/download/worker.js
@@ -0,0 +1,34 @@
+addEventListener("install", function (evt) {
+  evt.waitUntil(self.skipWaiting());
+});
+
+addEventListener("activate", function (evt) {
+  // We claim the current clients in order to ensure that we have an
+  // active client when we call unregister in the fetch handler.  Otherwise
+  // the unregister() can kill the current worker before returning a
+  // response.
+  evt.waitUntil(clients.claim());
+});
+
+addEventListener("fetch", function (evt) {
+  // This worker may live long enough to receive a fetch event from the next
+  // test.  Just pass such requests through to the network.
+  if (!evt.request.url.includes("fake_download")) {
+    return;
+  }
+
+  // We should only get a single download fetch event. Automatically unregister.
+  evt.respondWith(
+    registration.unregister().then(function () {
+      return new Response("service worker generated download", {
+        headers: {
+          "Content-Disposition": 'attachment; filename="fake_download.bin"',
+          // Prevent the default text editor from being launched
+          "Content-Type": "application/octet-stream",
+          // fake encoding header that should have no effect
+          "Content-Encoding": "gzip",
+        },
+      });
+    })
+  );
+});