[ServiceWorker] Tests for WindowClient.focus().

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

Index: LayoutTests/http/tests/serviceworker/chromium/resources/windowclient-focus.js
diff --git a/LayoutTests/http/tests/serviceworker/chromium/resources/windowclient-focus.js b/LayoutTests/http/tests/serviceworker/chromium/resources/windowclient-focus.js
new file mode 100644
index 0000000000000000000000000000000000000000..026bc83292eda8534c89da287c1cefa3f13b132f
--- /dev/null
+++ b/LayoutTests/http/tests/serviceworker/chromium/resources/windowclient-focus.js
@@ -0,0 +1,125 @@
+// This helper will setup a small test framework that will use TESTS and run

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Please rename this file to windowclient-focus-worker.js to make more clear this
is a service worker script. It would be consistent with the other code in this
directory.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

It would be inconsistent with:
- notificationclick-can-focus.js
- notificationclick-can-openwindow.js
- client-openwindow.js

Let's keep this consistent with those given that they are the same kind of
tests.

+// them iteratively and call self.postMessage('quit') when done.

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Iteratively, sure. Sequentially though?

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done. Change the other files.

+// This helper also exposes |client|, |postMessage()|, |runNextTestOrQuit()|,

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

This helper does not expose runNextTestOrQuit, it is in sw-test-helpers.js. Same
for postMessage. This helper assigns but does not declare |client|.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

sw-test-helpers.js is the helper.

+// |synthesizeNotificationClick()| and |initialize()|.
+importScripts('sw-test-helpers.js');
+
+var nestedClients = [];

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Please document this global.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+
+// Override self.initiaze() from sw-test-helpers.js

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

initialize

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+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|.
+            // It's url ends with '.html' while the others ends with '.html?X'

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Its

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+            if (c.url.search(/\.html\?[0-9]/) != -1)

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

I think this is more readable by avoiding a regex:
if (c.url.endsWith('.html') {
  client = c
} else {
  nestedClients.push(c);
}

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

I would have bet I tried to write some code in Chrome Beta and endsWith wasn't
there yet.

Done.

+                nestedClients.push(c);
+            else
+                client = c;

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Is this not declared as a global explicitly? Please do, and document it. Ugh
you're setting a global from an imported script. Ok. Please document that, it's
hard to read.

[mlamouri (slow - plz ping), 2015/02/18 11:34:56]

It's documented in the first block of comment.

+        });
+    });
+}

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

semicolon

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+
+function getNumberOfFocusedClients() {
+  return self.clients.getAll().then(function(clients) {
+    var focusedClients = 0;
+    clients.forEach(function(c) {

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Please avoid single character variable names unless it is a loop counter or an
error. This could be |client|. Same below.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

I do not use |client| on purpose to prevent confusion with the imported
|client|.

+      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 that point.

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

s/that/this/g

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+                self.postMessage('focused clients: ' + count);
+            }).then(runNextTestOrQuit);
+        });
+    },
+
+    function testFocusNestedFrames() {

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Maybe rename to |testFocusNestedFrame| as you expect to focus only one, right?
Same for the next test.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+        synthesizeNotificationClick().then(function(e) {

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

What is e?

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

event. Not used.

+            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 client at that point.

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

clients

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+                self.postMessage('focused clients: ' + count);
+            }).then(runNextTestOrQuit);
+        });
+    },
+
+    function testFocusOtherNestedFrames() {
+        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 be 2 focused client at that point.

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

Why? Presumably because focusing this frame blurred the other, but it would be
nice to make that explicit.

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Add a comment to explain.

+                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 client at that point.
+                    self.postMessage('focused clients: ' + count);
+                }).then(runNextTestOrQuit);
+            });
+        });
+    }
+];
+
+self.onmessage = function(e) {
+    if (e.data == "start") {

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

single quotes for js string literals

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.

+        initialize().then(runNextTestOrQuit);
+    } else {
+        initialize().then(function() {
+            self.postMessage('received unexpected message');
+            self.postMessage('quit');
+        });
+    }
+}

[Michael van Ouwerkerk, 2015/02/18 10:55:47]

semicolon

[mlamouri (slow - plz ping), 2015/02/18 11:34:55]

Done.