[ServiceWorker] Tests for WindowClient.focus().

LayoutTests/http/tests/serviceworker/chromium/resources/windowclient-focus.js

+// This helper will setup a small test framework that will use TESTS and run
+// them sequentially and call self.postMessage('quit') when done.
+// This helper also exposes |client|, |postMessage()|, |runNextTestOrQuit()|,
+// |synthesizeNotificationClick()| and |initialize()|.
+importScripts('sw-test-helpers.js');
+
+// Clients nested inside the main client (|client|) used in this test.
+var nestedClients = [];
+
+// Override self.initialize() from sw-test-helpers.js
+self.initialize = function() {
+    return self.clients.getAll().then(function(clients) {
+        clients.forEach(function(c) {
+            // All clients are iframes but one of them embeds the other ones. We
+            // want to use that one as the main |client|.
+            // Its url ends with '.html' while the others ends with '.html?X'
+            if (c.url.endsWith('.html'))
+                client = c;
+            else
+                nestedClients.push(c);
+        });
+    });
+};
+
+function getNumberOfFocusedClients() {
+  return self.clients.getAll().then(function(clients) {
+    var focusedClients = 0;
+    clients.forEach(function(c) {
+      if (c.focused)
+        ++focusedClients;
+    });
+    return focusedClients;
+  });
+}
+
+var TESTS = [
+    function testWithoutClick() {
+        client.focus().catch(function(e) {
+            self.postMessage('focus() can\'t focus a window without a user interaction');
+            self.postMessage('focus() error is ' + e.name);
+        }).then(runNextTestOrQuit);
+    },
+
+    function testFocusingFrame() {
+        synthesizeNotificationClick().then(function(e) {
+            client.focus().then(function(c) {
+                self.postMessage('focus() succeeded');
+                self.postMessage('focus() result: ' + c);
+                self.postMessage(' url: ' + c.url);
+                self.postMessage(' visibilityState: ' + c.visibilityState);
+                self.postMessage(' focused: ' + c.focused);
+                self.postMessage(' frameType: ' + c.frameType);
+            }).then(getNumberOfFocusedClients)
+            .then(function(count) {
+                // There should be 1 focused client at this point.
+                self.postMessage('focused clients: ' + count);
+            }).then(runNextTestOrQuit);
+        });
+    },
+
+    function testFocusNestedFrame() {
+        synthesizeNotificationClick().then(function(e) {
+            nestedClients[0].focus().then(function(c) {
+                self.postMessage('focus() succeeded');
+                self.postMessage('focus() result: ' + c);
+                self.postMessage(' url: ' + c.url);
+                self.postMessage(' visibilityState: ' + c.visibilityState);
+                self.postMessage(' focused: ' + c.focused);
+                self.postMessage(' frameType: ' + c.frameType);
+            }).then(getNumberOfFocusedClients)
+            .then(function(count) {
+                // There should be 2 focused clients at this point.
+                // The nested frame and its parent.
+                self.postMessage('focused clients: ' + count);
+            }).then(runNextTestOrQuit);
+        });
+    },
+
+    function testFocusOtherNestedFrame() {
+        synthesizeNotificationClick().then(function(e) {
+            nestedClients[1].focus().then(function(c) {
+                self.postMessage('focus() succeeded');
+                self.postMessage('focus() result: ' + c);
+                self.postMessage(' url: ' + c.url);
+                self.postMessage(' visibilityState: ' + c.visibilityState);
+                self.postMessage(' focused: ' + c.focused);
+                self.postMessage(' frameType: ' + c.frameType);
+            }).then(getNumberOfFocusedClients)
+            .then(function(count) {
+                // There should still be 2 focused clients at this point.
+                // The nested frame and its parent.
+                self.postMessage('focused clients: ' + count);
+            }).then(runNextTestOrQuit);
+        });
+    },
+
+    function testFocusOpenedWindow() {
+        synthesizeNotificationClick().then(function(e) {
+            return self.clients.openWindow('windowclient-focus.html?3');
+        }).then(function(c) {
+            synthesizeNotificationClick().then(function(e) {
+                c.focus().then(function() {
+                    self.postMessage('focus() succeeded');
+                    self.postMessage('focus() result: ' + c);
+                    self.postMessage(' url: ' + c.url);
+                    self.postMessage(' visibilityState: ' + c.visibilityState);
+                    self.postMessage(' focused: ' + c.focused);
+                    self.postMessage(' frameType: ' + c.frameType);
+                }).then(getNumberOfFocusedClients)
+                .then(function(count) {
+                    // There should be 1 focused clients at this point.
+                    self.postMessage('focused clients: ' + count);
+                }).then(runNextTestOrQuit);
+            });
+        });
+    }
+];
+
+self.onmessage = function(e) {
+    if (e.data == 'start') {
+        initialize().then(runNextTestOrQuit);
+    } else {
+        initialize().then(function() {
+            self.postMessage('received unexpected message');
+            self.postMessage('quit');
+        });
+    }
+};