py: phantomjs: add port information to WebDriverException

In case it cannot connect to GhostDriver, it will now also provide information about the port being used. Signed-off-by: AutomatedTester <dburns@mozilla.com>

Author: blueyed

py/selenium/webdriver/phantomjs/service.py

@@ -65,7 +65,7 @@ def start(self):
 
  :Exceptions:
  - WebDriverException : Raised either when it can't start the service
- or when it can't connect to the service
+ or when it can't connect to the service.
  """
  try:
  self.process = subprocess.Popen(self.service_args, stdin=subprocess.PIPE,
@@ -79,7 +79,8 @@ def start(self):
  count += 1
  time.sleep(1)
  if count == 30:
- raise WebDriverException("Can not connect to GhostDriver")
+ raise WebDriverException(
+ "Can not connect to GhostDriver on port {}".format(self.port))
 
  @property
  def service_url(self):