Proof of concept for running extension API stack through dev tools.

tools/telemetry_auto/telemetry_auto/webui_page.py

+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+import os
+import sys
+
+import telemetry
+from telemetry import util
+
+class TestException(Exception):
+  def __init__(self, message):
+    self.message = message
+    super(TestException, self).__init__()
+
+  def __str__(self):
+    return repr(self.message)
+
+class WebUIPage(object):
+  def __init__(self, browser):
+    self.browser = browser
+    self.page = None
+
+  def __enter__(self):
+    return self
+
+  def __exit__(self, *args):
+    self.Close()
+
+  def AddTestHelperMethods(self):
+    next_command = """
+      var _raiseMouseEvent = function(target, var_args) {
+        var event = document.createEvent('MouseEvents');
+        event.initEvent.apply(event, Array.prototype.slice.call(arguments, 1));
+        target.dispatchEvent(event);
+      };
+    """
+    self.page.runtime.Execute(next_command)
+
+  def ConnectToFirstPage(self, pages):
+    try:
+      self.Close()
+    except Exception:
+      # Ignore exceptions here since the page might be gone by now.
+      pass
+
+    for page in pages:
+      self.page = self.browser.tabs.FindByUrl(page)
+      if not self.page is None:
+        print 'Connected to %s' % page
+        return True
+
+    return False
+
+  def WaitForPageToLoad(self, pages):
+    util.WaitFor(
+        lambda: self.ConnectToFirstPage(pages),
+                timeout=10)
+    if self.page is None:
+      raise TestException('Cannot connect to page(s)')
+
+  def WaitUnitGone(self):
+    util.WaitFor(
+        lambda: not self.ConnectToFirstPage(self.page_urls),
+                timeout=30)
+    if not self.page is None:
+      raise TestException('Cannot disconnect from the current page')
+
+  def ClickOnButton(self, button_id):
+    self.page.runtime.Execute("""
+      _raiseMouseEvent($('%s'), 'click', true, true);
+    """ % button_id)
+
+  def Close(self):
+    if not self.page is None:
+      self.page.Close()
+      self.page = None
+