bitbake: toaster: browser tests - add Selenium Docker container as driver

Adds the ability to specify a Selenium Docker container server as
a driver. This allows for repeatable tests independent of host.
Currently we assume you are using the Firefox container. Instructions
are located in the README in tests/browser.

(Bitbake rev: 7df842f8f8b2ae640109ed06729ab59c9469fc64)

Signed-off-by: brian avery <brian.avery@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/tests/browser/selenium_helpers_base.py

@@ -39,7 +39,7 @@ from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
 from selenium.common.exceptions import NoSuchElementException, \
         StaleElementReferenceException, TimeoutException
 
-def create_selenium_driver(browser='chrome'):
+def create_selenium_driver(cls,browser='chrome'):
     # set default browser string based on env (if available)
     env_browser = os.environ.get('TOASTER_TESTS_BROWSER')
     if env_browser:
@@ -59,6 +59,15 @@ def create_selenium_driver(browser='chrome'):
         return webdriver.Ie()
     elif browser == 'phantomjs':
         return webdriver.PhantomJS()
+    elif browser == 'remote':
+        # if we were to add yet another env variable like TOASTER_REMOTE_BROWSER
+        # we could let people pick firefox or chrome, left for later
+        remote_hub= os.environ.get('TOASTER_REMOTE_HUB')
+        driver = webdriver.Remote(remote_hub,
+                                  webdriver.DesiredCapabilities.FIREFOX.copy())
+
+        driver.get("http://%s:%s"%(cls.server_thread.host,cls.server_thread.port))
+        return driver
     else:
         msg = 'Selenium driver for browser %s is not available' % browser
         raise RuntimeError(msg)
@@ -135,7 +144,7 @@ class SeleniumTestCaseBase(unittest.TestCase):
 
         # instantiate the Selenium webdriver once for all the test methods
         # in this test case
-        cls.driver = create_selenium_driver()
+        cls.driver = create_selenium_driver(cls)
         cls.driver.maximize_window()
 
     @classmethod