[ServiceWorker] Tests for Clients.openWindow().

LayoutTests/http/tests/serviceworker/chromium/resources/notificationclick-can-openwindow.js

-var client = null;
+// This helper will setup a small test framework that will use TESTS and run
+// them iteratively and call self.postMessage('quit') when done.
+// This helper also exposes |client|, |postMessage()|, |runNextTestOrQuit()|,
+// |synthesizeNotificationClick()| and |initialize()|.
+importScripts('sw-test-helpers.js');
 
-function initialize() {
-    return self.clients.getAll().then(function(clients) {
-        client = clients[0];
-    });
-}
-
-function synthesizeNotificationClick() {
-    var promise = new Promise(function(resolve) {
-        var title = "fake notification";
-        registration.showNotification(title).then(function() {
-            client.postMessage({type: 'click', title: title});
-        });
-
-        var handler = function(e) {
-            resolve(e);
-            e.notification.close();
-            self.removeEventListener('notificationclick', handler);
-        };
-
-        self.addEventListener('notificationclick', handler);
-    });
-
-    return promise;
-}
-
-var currentTest = -1;
 var TESTS = [
     function testWithNoNotificationClick() {
         clients.openWindow('/foo.html').catch(function() {
-            client.postMessage('openWindow() outside of a notificationclick event failed');
+            self.postMessage('openWindow() outside of a notificationclick event failed');
         }).then(runNextTestOrQuit);
     },
 
     function testInStackOutOfWaitUntil() {
         synthesizeNotificationClick().then(function() {
             clients.openWindow('/foo.html').then(function() {
-                client.postMessage('openWindow() in notificationclick outside of waitUntil but in stack succeeded');
+                self.postMessage('openWindow() in notificationclick outside of waitUntil but in stack succeeded');
             }).then(runNextTestOrQuit);
         });
     },
 
     function testOutOfStackOutOfWaitUntil() {
         synthesizeNotificationClick().then(function() {
             self.clients.getAll().then(function() {
                 clients.openWindow('/foo.html').catch(function() {
-                    client.postMessage('openWindow() in notificationclick outside of waitUntil not in stack failed');
+                    self.postMessage('openWindow() in notificationclick outside of waitUntil not in stack failed');
                 }).then(runNextTestOrQuit);
             });
         });
     },
 
     function testInWaitUntilAsyncAndDoubleCall() {
         synthesizeNotificationClick().then(function(e) {
             e.waitUntil(self.clients.getAll().then(function() {
                 return clients.openWindow('/foo.html').then(function() {
-                    client.postMessage('openWindow() in notificationclick\'s waitUntil suceeded');
+                    self.postMessage('openWindow() in notificationclick\'s waitUntil suceeded');
                 }).then(runNextTestOrQuit);
             }));
         });
     },
 
     function testDoubleCallInWaitUntilAsync() {
         synthesizeNotificationClick().then(function(e) {
             e.waitUntil(self.clients.getAll().then(function() {
                 return clients.openWindow('/foo.html').then(function() {
                     return clients.openWindow('/foo.html');
                 }).catch(function() {
-                    client.postMessage('openWindow() called twice failed');
+                    self.postMessage('openWindow() called twice failed');
                 }).then(runNextTestOrQuit);
             }));
         });
     },
 
 
     function testWaitUntilTimeout() {
         var p = new Promise(function(resolve) {
             setTimeout(function() {
                 resolve();
             }, 2000);
         });
 
         synthesizeNotificationClick().then(function(e) {
             e.waitUntil(p.then(function() {
                 return clients.openWindow('/foo.html').catch(function() {
-                    client.postMessage('openWindow() failed after timeout');
+                    self.postMessage('openWindow() failed after timeout');
                 }).then(runNextTestOrQuit);
             }));
         });
     },
 
     function testFocusWindowOpenWindowCombo() {
         synthesizeNotificationClick().then(function(e) {
             e.waitUntil(client.focus().then(function() {
                 clients.openWindow().catch(function() {
-                    client.postMessage('openWindow() failed because a window was focused before');
+                    self.postMessage('openWindow() failed because a window was focused before');
                 }).then(runNextTestOrQuit);
             }));
         });
     },
 ];
 
-function runNextTestOrQuit() {
-    ++currentTest;
-    if (currentTest >= TESTS.length) {
-        client.postMessage('quit');
-        return;
-    }
-    TESTS[currentTest]();
-}
-
 self.onmessage = function(e) {
     if (e.data == "start") {
         initialize().then(runNextTestOrQuit);
     } else {
         initialize().then(function() {
-            client.postMessage('received unexpected message');
-            client.postMessage('quit');
+            self.postMessage('received unexpected message');
+            self.postMessage('quit');
         });
     }
 }