1 files changed, 30 insertions, 0 deletions
diff --git a/dom/workers/test/serviceworkers/download/worker.js b/dom/workers/test/serviceworkers/download/worker.js
new file mode 100644
index 000000000..fe46d1a3b
--- /dev/null
+++ b/dom/workers/test/serviceworkers/download/worker.js
@@ -0,0 +1,30 @@
+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.indexOf('fake_download') === -1) {
+    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"',
+        // fake encoding header that should have no effect
+        'Content-Encoding': 'gzip',
+      }
+    });
+  }));
+});