Fixes for chrome reliability in selenium.

Fix for rendering timing issue. See https://bugs.chromium.org/p/chromedriver/issues/detail?id=1552

common/djangoapps/terrain/browser.py

@@ -81,6 +81,9 @@ def initial_setup(server):
             desired_capabilities['loggingPrefs'] = {
                 'browser': 'ALL',
             }
+            desired_capabilities['chromeOptions'] = {
+                "args": ["--dns-prefetch-disable"]
+            }
         else:
             desired_capabilities = {}
 

lms/djangoapps/courseware/features/lti.py

@@ -9,6 +9,7 @@ from splinter.exceptions import ElementDoesNotExist
 from selenium.common.exceptions import NoAlertPresentException
 from nose.tools import assert_true, assert_equal, assert_in, assert_is_none
 from lettuce import world, step
+from selenium.webdriver.common.keys import Keys
 
 from courseware.tests.factories import InstructorFactory, BetaTesterFactory
 from courseware.access import has_access
@@ -359,9 +360,19 @@ def click_grade(_step, version):
     location = world.scenario_dict['LTI'].location.html_id()
     iframe_name = 'ltiFrame-' + location
     with world.browser.get_iframe(iframe_name) as iframe:
-        css_loc = '#' + version_map[version]['selector']
+        css_ele = version_map[version]['selector']
+        css_loc = '#' + css_ele
         world.wait_for_visible(css_loc)
+        print 'waiting..'
+        # from nose.tools import set_trace; set_trace()
+        world.wait(8)
+        print 'proceding'
+        # world.css_click(css_loc)
+        # ele = world.css_find(css_loc).first
+        # ele._element.send_keys(Keys.ENTER)
+        # world.browser.execute_script('document.getElementById("{}").click()'.format(css_ele))
         world.css_click(css_loc)
+        # world.css_click(css_loc)
         assert iframe.is_text_present(version_map[version]['expected_text'])
 
 

pavelib/utils/test/suites/acceptance_suite.py

@@ -94,6 +94,8 @@ class AcceptanceTest(TestSuite):
         report_args = ["--xunit-file {}".format(report_file)]
         return [
             "DBUS_SESSION_BUS_ADDRESS=/dev/null",
+            # 'LANG="en_US.UTF-8"',
+            'LC_NUMERIC="en_US.UTF-8"',
             "DEFAULT_STORE={}".format(self.default_store),
             "./manage.py",
             self.system,