Bug 1465670 P3 Fix dom/cache service worker test harness to call importScripts() during install. r=asuth

dom/cache/test/mochitest/serviceworker_driver.js

@@ -4,8 +4,10 @@
 function serviceWorkerTestExec(testFile) {
   return new Promise(function(resolve, reject) {
     function setupSW(registration) {
-      var worker = registration.waiting ||
+      var worker = registration.installing ||
+                   registration.waiting ||
                    registration.active;
+      var iframe;
 
       window.addEventListener("message",function onMessage(event) {
         if (event.data.context != "ServiceWorker") {
@@ -13,6 +15,7 @@ function serviceWorkerTestExec(testFile) {
         }
         if (event.data.type == 'finish') {
           window.removeEventListener("message", onMessage);
+          iframe.remove();
           registration.unregister()
             .then(resolve)
             .catch(reject);
@@ -23,7 +26,7 @@ function serviceWorkerTestExec(testFile) {
 
       worker.onerror = reject;
 
-      var iframe = document.createElement("iframe");
+      iframe = document.createElement("iframe");
       iframe.src = "message_receiver.html";
       iframe.onload = function() {
         worker.postMessage({ script: testFile });
@@ -31,7 +34,7 @@ function serviceWorkerTestExec(testFile) {
       document.body.appendChild(iframe);
     }
 
-    navigator.serviceWorker.ready.then(setupSW);
-    navigator.serviceWorker.register("worker_wrapper.js", {scope: "."});
+    navigator.serviceWorker.register("worker_wrapper.js", {scope: "."})
+      .then(setupSW);
   });
 }

dom/cache/test/mochitest/worker_wrapper.js

@@ -92,6 +92,8 @@ function workerTestGetUserAgent(cb) {
   });
 }
 
+var completeInstall = null;
+
 addEventListener('message', function workerWrapperOnMessage(e) {
   removeEventListener('message', workerWrapperOnMessage);
   var data = e.data;
@@ -108,7 +110,7 @@ addEventListener('message', function workerWrapperOnMessage(e) {
     }
   }
   if ("ServiceWorker" in self) {
-    self.clients.matchAll().then(function(clients) {
+    self.clients.matchAll({ includeUncontrolled: true }).then(function(clients) {
       for (var i = 0; i < clients.length; ++i) {
         if (clients[i].url.indexOf("message_receiver.html") > -1) {
           client = clients[i];
@@ -120,6 +122,7 @@ addEventListener('message', function workerWrapperOnMessage(e) {
       }
       context = "ServiceWorker";
       runScript();
+      completeInstall();
     });
   } else {
     client = self;
@@ -127,3 +130,7 @@ addEventListener('message', function workerWrapperOnMessage(e) {
     runScript();
   }
 });
+
+addEventListener("install", e => {
+  e.waitUntil(new Promise(resolve => completeInstall = resolve));
+})