1 files changed, 59 insertions, 0 deletions
diff --git a/testing/web-platform/tests/appmanifest/icons-member/icons-member-service-worker.js b/testing/web-platform/tests/appmanifest/icons-member/icons-member-service-worker.js
new file mode 100644
index 0000000000..21b07f8515
--- /dev/null
+++ b/testing/web-platform/tests/appmanifest/icons-member/icons-member-service-worker.js
@@ -0,0 +1,59 @@
+// Some user agents only offer app installation if there is a SW and it handles
+// offline requests.
+
+const cacheVersion = "1.2";
+const CACHE_NAME = `cache-v${cacheVersion}`;
+
+// The resources cached by this service worker.
+const resources = [
+  "icons-member-cors-fail-manual.sub.html",
+  "icons-member-cors-manual.sub.html",
+  "icons-member-csp-fail-manual.sub.html",
+  "icons-member-csp-manual.sub.html",
+  "icons-member-last-matching-manual.html",
+  "icons-member-manual.html",
+  "icons-member-next-appropriate-manual.html",
+  "icons-member-service-worker.js",
+  "resources/icons-member-manual.js",
+  "resources/fail.png",
+  "resources/pass.png"
+];
+
+// Load all resources for this service worker.
+const precache = async () => {
+  const cache = await caches.open(CACHE_NAME);
+  await cache.addAll(resources);
+};
+
+// Get a resource from the cache.
+const fromCache = async request => {
+  const cache = await caches.open(CACHE_NAME);
+  return await cache.match(request.url);
+};
+
+// Attempt to get resources from the network first, fallback to the cache if we're
+// offline.
+const networkFallbackToCache = async request => {
+  try {
+    const response = await fetch(request);
+    if (response.ok) return response;
+  } catch (err) {}
+  return await fromCache(request);
+};
+
+// When we have a new service worker, update the caches and swap immediately.
+self.addEventListener("install", e => {
+  e.waitUntil(precache().then(() => self.skipWaiting()));
+});
+
+// Claim existing clients.
+self.addEventListener("activate", e => {
+  e.waitUntil(self.clients.claim());
+});
+
+// When a resource need to be fetched, check whether it is
+// contained in the cache and return the cached version, otherwise
+// get it from the network.
+self.addEventListener("fetch", e => {
+  e.respondWith(networkFallbackToCache(e.request));
+});