Fixed navigation acceptance test

Disable jquery animations to fix LMS navigation acceptance test.

common/djangoapps/terrain/ui_helpers.py

@@ -560,3 +560,17 @@ def retry_on_exception(func, max_attempts=5, ignored_exceptions=StaleElementRefe
             attempt += 1
 
     assert_true(attempt < max_attempts, 'Ran out of attempts to execute {}'.format(func))
+
+
+@world.absorb
+def disable_jquery_animations():
+    """
+    Disable JQuery animations on the page.  Any state changes
+    will occur immediately to the final state.
+    """
+
+    # Ensure that jquery is loaded
+    world.wait_for_js_to_load()
+
+    # Disable jQuery animations
+    world.browser.execute_script("jQuery.fx.off = true;")

lms/djangoapps/courseware/features/navigation.feature

@@ -4,12 +4,10 @@ Feature: LMS.Navigate Course
     In order to access courseware
     I want to be able to navigate through the content
 
-    # Disabled 10/21
-    # Fails intermittently to click the link to the section
-    #Scenario: I can navigate to a section
-    #    Given I am viewing a course with multiple sections
-    #    When I navigate to a section
-    #    Then I see the content of the section
+    Scenario: I can navigate to a section
+        Given I am viewing a course with multiple sections
+        When I navigate to a section
+        Then I see the content of the section
 
     Scenario: I can navigate to subsections
         Given I am viewing a section with multiple subsections
@@ -22,11 +20,9 @@ Feature: LMS.Navigate Course
         Then I see the content of the sequence item
         And a "seq_goto" browser event is emitted
 
-    # Disabled 10/21
-    # Fails intermittently to click the link to the section
-    #Scenario: I can return to the last section I visited
-    #   Given I am viewing a course with multiple sections
-    #   When I navigate to a section
-    #    And I see the content of the section
-    #    And I return to the courseware
-    #    Then I see that I was most recently in the subsection
+    Scenario: I can return to the last section I visited
+       Given I am viewing a course with multiple sections
+       When I navigate to a section
+        And I see the content of the section
+        And I return to the courseware
+        Then I see that I was most recently in the subsection

lms/djangoapps/courseware/features/navigation.py

@@ -88,6 +88,9 @@ def view_course_multiple_sequences(step):
 
 @step(u'I navigate to a section')
 def when_i_navigate_to_a_section(step):
+    # Prevent jQuery menu animations from interferring with the clicks
+    world.disable_jquery_animations()
+
     # Open the 2nd section
     world.css_click(css_selector='div.chapter', index=1)
     subsection_css = 'a[href*="Test_Subsection_2/"]'
@@ -176,6 +179,9 @@ def wait_for_problem(display_name):
     """
     Wait for the problem with `display_name` to appear on the page.
     """
+    # Wait for the problem to reload
+    world.wait_for_ajax_complete()
+
     wait_func = lambda _: world.css_has_text(
         'h2.problem-header', display_name, strip=True
     )