Implementation of AutomationEventQueue and associated framework to support generic non-blocking aut…

chrome/test/functional/apptest.py

+# Copyright (c) 2011 The Chromium Authors. All rights reserved.

[dennis_jeffrey, 2012/02/23 19:26:36]

2011 --> 2012

[craigdh, 2012/02/24 01:30:02]

Done.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import json
+
+import pyauto_functional  # must be imported before pyauto
+import pyauto
+import pyauto_errors
+
+
+class PyAutoEvents(pyauto.PyUITest):

[dennis_jeffrey, 2012/02/23 19:26:36]

nit: PyAutoEvents --> PyAutoEventsTest

[craigdh, 2012/02/24 01:30:02]

Done.

+
+  def testBasicEvents(self):
+    """Basic test for debugging the event queue."""
+    url = self.GetHttpURLForDataPath('apptest_basic.html')
+    driver = self.NewWebDriver()
+    id = self.ObserveRaisedEvents();
+    self.NavigateToURL(url)
+    self.verifyNextEvent(id, 'init')

[dennis_jeffrey, 2012/02/23 19:26:36]

Is there a place where we can see all the event strings we can wait for?  Would
it make sense to document that in pyauto.py?

[craigdh, 2012/02/24 01:30:02]

The event name is just an argument to raiseEvent(). For example, here we are
waiting for the app to call window.domAutomationController.raiseEvent('init').
(The actual Javascript implementation is actually slightly messier but is fixed
in a CL I have ready to follow this one. It should all be clear if you take a
look at raiseEvent() in apptest_basic.html)

+    self.verifyNextEvent(id, 'login ready')
+    driver.find_element_by_id('login').click()
+    self.verifyNextEvent(id, 'login start')
+    self.verifyNextEvent(id, 'login done')
+
+  def verifyNextEvent(self, id, event_name):
+    # TODO(craigdh): Temporary hack to ignore unexpected events generated by
+    # chromedriver's use of DomAutomationController. The upcoming revision to
+    # RaisedEvents will fix this. Note this isn't polling, just ignoring
+    # chromedriver events.
+    while json.loads(self.GetEvent(id).get('name')) != event_name:
+        pass

[dennis_jeffrey, 2012/02/23 19:26:36]

indent by 2 fewer spaces

[craigdh, 2012/02/24 01:30:02]

Done.

+
+
+if __name__ == '__main__':
+  pyauto_functional.Main()