successfully redirect after deleting a quiz from the show page

a typo was preventing the redirect from working.

fixes #CNVS-2424

test plan:
- create a quiz.
- go to the /courses/:id/quizzes/:id page
- hit the delete button in the right side bar
- you should be redirected to the quiz index page

Change-Id: If8768c11658eea473bfeb48dbb50d61e8e3e756c
Reviewed-on: https://gerrit.instructure.com/16416
QA-Review: Myller de Araujo <myller@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Simon Williams <simon@instructure.com>

app/views/quizzes/show.html.erb

@@ -114,7 +114,7 @@
 <% js_bundle :quiz_show %>
 <% jammit_css :quizzes, :learning_outcomes %>
 
-<a id="context_quzzes_url" style="display:none;" href="<%= context_url(@context, :context_quizzes_url) %>">&nbsp;<!-- This is needed by quiz_show.js --></a>
+<a id="context_quizzes_url" style="display:none;" href="<%= context_url(@context, :context_quizzes_url) %>">&nbsp;<!-- This is needed by quiz_show.js --></a>
 
 <header class="quiz-header">
 <h2 id="quiz_title"><%= @quiz.quiz_title || @quiz.readable_type %></h2>

spec/selenium/common.rb

@@ -638,6 +638,14 @@ shared_examples_for "all selenium tests" do
     end
   end
 
+  def accept_alert
+    keep_trying_until do
+      alert = driver.switch_to.alert
+      alert.accept
+      true
+    end
+  end
+
   def in_frame(id, &block)
     saved_window_handle = driver.window_handle
     driver.switch_to.frame(id)

spec/selenium/teacher_quizzes_spec.rb

@@ -473,6 +473,19 @@ describe "quizzes" do
 
       f('#content .question_name').should include_text("Question 1")
     end
+
+    it "should delete a quiz" do
+      quiz_with_submission
+      get "/courses/#{@course.id}/quizzes/#{@quiz.id}"
+
+      expect_new_page_load do
+        f('.delete_quiz_link').click
+        accept_alert
+      end
+
+      # Confirm that we make it back to the quizzes index page
+      f('#content').should include_text("Course Quizzes")
+    end
   end
 end