Fixed upload test. Also added information to testing.md

cms/djangoapps/contentstore/features/upload.py

@@ -9,8 +9,6 @@ import random
 import os
 
 TEST_ROOT = settings.COMMON_TEST_DATA_ROOT
-HTTP_PREFIX = "http://localhost:%s" % settings.LETTUCE_SERVER_PORT
-
 
 @step(u'I go to the files and uploads page')
 def go_to_uploads(_step):
@@ -109,6 +107,8 @@ def get_file(file_name):
     index = get_index(file_name)
     assert index != -1
 
-    url_css = 'input.embeddable-xml-input'
-    url = world.css_find(url_css)[index].value
-    return requests.get(HTTP_PREFIX + url)
+    url_css = 'a.filename'
+    def get_url():
+        return world.css_find(url_css)[index]._element.get_attribute('href')
+    url = world.retry_on_exception(get_url)
+    return requests.get(url)

docs/internal/testing.md

@@ -196,7 +196,11 @@ To run all the acceptance tests:
 
 To test only a specific feature:
 
-    rake test_acceptance_lms[lms/djangoapps/courseware/features/problems.feature]
+    rake test_acceptance_lms["lms/djangoapps/courseware/features/problems.feature"]
+
+To test only a specific scenario
+
+    rake test_acceptance_lms["lms/djangoapps/courseware/features/problems.feature -s 3"]
 
 To start the debugger on failure, add the `--pdb` option: