Tests for WaitUntilObserver and focus/openining windows.

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

+var client = null;
+
+function initializeClient() {
+    return self.clients.getAll().then(function(clients) {
+        client = clients[0];
+    });
+}
+
+function afterWindowFocus() {
+    var title = 'afterWindowFocus';
+    registration.showNotification(title).then(function() {
+        client.postMessage({type: 'click', title: title});
+    });
+
+    var handler = function (e) {
+        e.waitUntil(client.focus().then(function() {
+            clients.openWindow().catch(function() {
+                client.postMessage('openWindow() failed because a window was focused before');
+                client.postMessage('quit');
+            });
+        }));
+        self.removeEventListener('notificationclick', handler);
+    };
+
+    self.addEventListener('notificationclick', handler);
+}
+
+function testTimeout() {
+    var title = 'testTimeout';
+    registration.showNotification(title).then(function() {
+        client.postMessage({type: 'click', title: title});
+    });
+
+    var p = new Promise(function(resolve) {
+        setTimeout(function() {
+            resolve();
+        }, 2000);
+    });
+
+    var handler = function (e) {
+        e.waitUntil(p.then(function() {
+            return clients.openWindow('/foo.html').catch(function() {
+                client.postMessage('openWindow() failed after timeout');
+                afterWindowFocus();
+            });
+        }));
+        self.removeEventListener('notificationclick', handler);
+    };
+
+    self.addEventListener('notificationclick', handler);
+}
+
+function testWithSWNotificationClick3() {
+    var title = 'testWithSWNotificationClick3';
+    registration.showNotification(title).then(function() {
+        client.postMessage({type: 'click', title: title});
+    });
+
+    var handler = function (e) {
+        e.waitUntil(self.clients.getAll().then(function() {
+            return clients.openWindow('/foo.html').then(function() {
+                client.postMessage('openWindow() in notificationclick\'s waitUntil suceeded');
+                return clients.openWindow('/foo.html');
+            }).catch(function() {
+                client.postMessage('openWindow() called twice failed');
+                testTimeout();
+            });
+        }));
+        self.removeEventListener('notificationclick', handler);
+    };
+
+    self.addEventListener('notificationclick', handler);
+}
+
+function testWithSWNotificationClick2() {
+    var title = 'testWithSWNotificationClick2';
+    registration.showNotification(title).then(function() {
+        client.postMessage({type: 'click', title: title});
+    });
+
+    var handler = function (e) {
+        self.clients.getAll().then(function() {
+            clients.openWindow('/foo.html').catch(function() {
+                client.postMessage('openWindow() in notificationclick outside of waitUntil not in stack failed');
+            }).then(testWithSWNotificationClick3);
+        });
+        self.removeEventListener('notificationclick', handler);
+    };
+
+    self.addEventListener('notificationclick', handler);
+}
+
+function testWithSWNotificationClick1() {
+    var title = 'testWithSWNotificationClick1';
+    registration.showNotification(title).then(function() {
+        client.postMessage({type: 'click', title: title});
+    });
+
+    var handler = function(e) {
+        clients.openWindow('/foo.html').then(function() {
+            client.postMessage('openWindow() in notificationclick outside of waitUntil but in stack succeeded');
+        }).then(testWithSWNotificationClick2);
+        self.removeEventListener('notificationclick', handler);
+    };
+
+    self.addEventListener('notificationclick', handler);
+}
+
+function testWithNotificationClick() {
+    var notification = new Notification('My Notification');
+    notification.addEventListener('show', function() {
+        client.postMessage({type: 'click', title: 'My Notification'});
+    });
+
+    notification.addEventListener('click', function() {
+        clients.openWindow('/foo.html').then(function() {
+            client.postMessage('openWindow() in Notification click event succeeded');
+        }).then(function() {
+            clients.openWindow('/foo.html').catch(function() {
+                client.postMessage('openWindow() called twice failed');
+                notification.close();
+                testWithSWNotificationClick1();
+            });
+        });
+    });
+
+    notification.addEventListener('error', function() {
+        client.postMessage('failed');
+        client.postMessage('quit');
+    });
+}
+
+function testWithNoClick() {
+    clients.openWindow('/foo.html').catch(function() {
+        client.postMessage('openWindow() outside of a Notification click event failed');
+        testWithNotificationClick();
+    });
+}
+
+self.onmessage = function(e) {
+    switch(e.data) {
+        case "start":
+            initializeClient().then(testWithNoClick);
+            break;
+    }
+}