redirect from ember quiz stats when no permission

also better organize testing of permission redirection into a module

closes CNVS-12829

test plan:
  - enable fabulous quizzes
  - as an instructor
    - visit a quiz show page
      - verify that user can navigate through Overview, Moderate,
        Statistics tabs
  - as a student
    - visist a quiz show page
      - verify that users gets redirected to the Overview when navigating to Moderate or
        Statistics Tab
      - verify that redirect happens if user enters the correct url for
        moderate or statistics as well.

Change-Id: Ib87c42c53d9e53f224914cdab34d1781592a8512
Reviewed-on: https://gerrit.instructure.com/34256
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Reviewed-by: Josh Simpson <jsimpson@instructure.com>
Product-Review: Jason Madsen <jmadsen@instructure.com>

app/coffeescripts/ember/quizzes/routes/quiz_statistics_route.coffee

@@ -1,7 +1,16 @@
-define [ 'ember', 'underscore' ], (Ember, _) ->
+define [
+  'ember'
+  'underscore'
+  '../mixins/redirect'
+], (Ember, _, Redirect) ->
+
   {RSVP} = Ember
 
-  Ember.Route.extend
+  Ember.Route.extend Redirect,
+
+    beforeModel: (transition) ->
+      @validateRoute('canManage', 'quiz.show')
+
     model: (transition, options) ->
       quiz = @modelFor('quiz')
       quiz.get('quizStatistics').then((items)->
@@ -18,4 +27,4 @@ define [ 'ember', 'underscore' ], (Ember, _) ->
       # anyway, do it manually:
       set = @modelFor('quizStatistics').get('questionStatistics')
       set.clear()
-      set.pushObjects(@store.all('questionStatistics'))
+      set.pushObjects(@store.all('questionStatistics'))

app/coffeescripts/ember/quizzes/tests/adapters/quiz_report_adapter.spec.coffee

@@ -13,6 +13,9 @@ define [
       App = startApp()
       fixtures.create()
       subject = App.__container__.lookup('adapter:quizReport')
+
+      #tmp workaround. these tests shouldn't need to visit the route
+      env.setUserPermissions(true, true)
       visit('/1/statistics')
 
      teardown: ->
@@ -20,4 +23,4 @@ define [
 
   test 'it uses the report URL', ->
     url = subject.buildURL 'quizReport', 14
-    ok url.match('/api/v1/courses/1/quizzes/1/reports/14')
+    ok url.match('/api/v1/courses/1/quizzes/1/reports/14')

app/coffeescripts/ember/quizzes/tests/environment_setup.coffee

@@ -7,3 +7,14 @@ define ['../shared/environment'], (env) ->
     }
   }
   env.setEnv ENV
+
+  {
+    setUserPermissions: (canManage, canUpdate) ->
+        prevContextAsset = env.get('env').context_asset_string
+        env.setEnv
+          context_asset_string: prevContextAsset
+          PERMISSIONS:
+            manage: canManage
+            update: canUpdate
+        env
+  }

app/coffeescripts/ember/quizzes/tests/integration/quiz_moderate.spec.coffee

@@ -3,8 +3,9 @@ define [
   '../start_app'
   '../shared_ajax_fixtures'
   '../environment_setup'
-  '../../shared/environment'
-], (Ember, startApp, fixtures, env) ->
+  '../test_redirection'
+]
+, (Ember, startApp, fixtures, env, testRedirection) ->
 
   module "Quiz Moderate: Integration",
 
@@ -15,28 +16,7 @@ define [
      teardown: ->
        Ember.run App, 'destroy'
 
-  test 'redirect non-permissioned users to quiz.show', ->
-    env.setEnv
-      PERMISSIONS:
-        manage: false
-        update: false
-
-    visit('/1/moderate')
-    andThen ->
-      wait().then ->
-        # this can change to currentRoute() once we update ember >= 1.5.0
-        currentRoute = App.__container__.lookup('controller:application').get('currentRouteName')
-        equal currentRoute, 'quiz.show'
-
-  test 'permissioned users should see moderate page', ->
-    env.setEnv
-      PERMISSIONS:
-        manage: true
-        update: true
-
-    visit('/1/moderate')
-    andThen ->
-      wait().then ->
-        # this can change to currentRoute() once we update ember >= 1.5.0
-        currentRoute = App.__container__.lookup('controller:application').get('currentRouteName')
-        equal currentRoute, 'quiz.moderate'
+  testRedirection
+    path: '/1/moderate'
+    defaultRoute: 'quiz.moderate'
+    redirectRoute: 'quiz.show'

app/coffeescripts/ember/quizzes/tests/integration/quiz_statistics_integration.spec.coffee

@@ -3,7 +3,8 @@ define [
   '../start_app'
   '../environment_setup'
   '../shared_ajax_fixtures'
-], (Ember, startApp, env, fixtures) ->
+  '../test_redirection'
+], (Ember, startApp, env, fixtures, testRedirection) ->
   App = null
 
   {$} = Ember
@@ -18,6 +19,7 @@ define [
 
   testPage = (desc, callback) ->
     test desc, ->
+      env.setUserPermissions(true, true)
       visit('/1/statistics').then callback
 
   testPage 'it renders', ->
@@ -29,3 +31,8 @@ define [
     equal q.get('quizReports.length'), 2, 'loads quiz reports'
     ok qs = route.modelFor('quizStatistics'), 'loads quiz statistics'
     equal qs.get('questionStatistics.length'), 11, 'loads question statistics'
+
+  testRedirection
+    path: '/1/statistics'
+    defaultRoute: 'quiz.statistics'
+    redirectRoute: 'quiz.show'

app/coffeescripts/ember/quizzes/tests/test_redirection.coffee

@@ -0,0 +1,22 @@
+define [
+  './environment_setup'
+], (env) ->
+  verifyRoute = (path, expected) ->
+    visit(path)
+    andThen ->
+      wait().then ->
+        # this can change to currentRoute() once we update ember >= 1.5.0
+        currentRoute = App.__container__.lookup('controller:application').get('currentRouteName')
+        equal currentRoute, expected
+
+  testRedirection = (options) ->
+    {path, defaultRoute, redirectRoute} = options
+    test "permissioned users should see #{defaultRoute}", ->
+      env.setUserPermissions(true, true)
+      verifyRoute(path, defaultRoute)
+
+    test 'redirect non-permissioned users to #{redirectRoute}', ->
+      env.setUserPermissions(false, false)
+      verifyRoute(path, redirectRoute)
+
+  testRedirection