Fixed issue with code mirror editing

It turns out that code mirror things can be edited.  Once the div is clicked, a new text area appears that can be obtained and sent keys

cms/djangoapps/contentstore/features/advanced-settings.feature

@@ -11,8 +11,6 @@ Feature: Advanced (manual) course policy
     Given I am on the Advanced Course Settings page in Studio
     Then the settings are alphabetized
 
-  # Skipped because Ubuntu ChromeDriver cannot click notification "Cancel"
-  @skip
   Scenario: Test cancel editing key value
     Given I am on the Advanced Course Settings page in Studio
     When I edit the value of a policy key
@@ -21,8 +19,6 @@ Feature: Advanced (manual) course policy
     And I reload the page
     Then the policy key value is unchanged
 
-  # Skipped because Ubuntu ChromeDriver cannot click notification "Save"
-  @skip
   Scenario: Test editing key value
     Given I am on the Advanced Course Settings page in Studio
     When I edit the value of a policy key and save
@@ -30,8 +26,6 @@ Feature: Advanced (manual) course policy
     And I reload the page
     Then the policy key value is changed
 
-  # Skipped because Ubuntu ChromeDriver cannot edit CodeMirror input
-  @skip
   Scenario: Test how multi-line input appears
     Given I am on the Advanced Course Settings page in Studio
     When I create a JSON object as a value
@@ -39,8 +33,6 @@ Feature: Advanced (manual) course policy
     And I reload the page
     Then it is displayed as formatted
 
-  # Skipped because Ubuntu ChromeDriver cannot edit CodeMirror input
-  @skip
   Scenario: Test automatic quoting of non-JSON values
     Given I am on the Advanced Course Settings page in Studio
     When I create a non-JSON value not in quotes

cms/djangoapps/contentstore/features/advanced-settings.py

@@ -42,8 +42,13 @@ def edit_the_value_of_a_policy_key(step):
     It is hard to figure out how to get into the CodeMirror
     area, so cheat and do it from the policy key field :)
     """
-    e = world.css_find(KEY_CSS)[get_index_of(DISPLAY_NAME_KEY)]
-    e._element.send_keys(Keys.TAB, Keys.END, Keys.ARROW_LEFT, ' ', 'X')
+    #world.css_find(".CodeMirror")[12].click()
+    all_mirrors = world.css_find(".CodeMirror")
+    for codeMirror in all_mirrors:
+        if codeMirror.text == DISPLAY_NAME_VALUE:
+            codeMirror.click()
+    g = world.css_find("div.CodeMirror.CodeMirror-focused > div > textarea")[0]
+    g._element.send_keys(Keys.ARROW_LEFT, ' ', 'X')
 
 
 @step(u'I edit the value of a policy key and save$')
@@ -123,10 +128,15 @@ def get_display_name_value():
 
 
 def change_display_name_value(step, new_value):
-    e = world.css_find(KEY_CSS)[get_index_of(DISPLAY_NAME_KEY)]
+
+    all_mirrors = world.css_find(".CodeMirror")
+    for codeMirror in all_mirrors:
+        if codeMirror.text == DISPLAY_NAME_VALUE:
+            codeMirror.click()
+    g = world.css_find("div.CodeMirror.CodeMirror-focused > div > textarea")[0]
     display_name = get_display_name_value()
     for count in range(len(display_name)):
-        e._element.send_keys(Keys.TAB, Keys.END, Keys.BACK_SPACE)
+        g._element.send_keys(Keys.END, Keys.BACK_SPACE)
         # Must delete "" before typing the JSON value
-    e._element.send_keys(Keys.TAB, Keys.END, Keys.BACK_SPACE, Keys.BACK_SPACE, new_value)
+    g._element.send_keys(Keys.END, Keys.BACK_SPACE, Keys.BACK_SPACE, new_value)
     press_the_notification_button(step, "Save")