Create a test framework and make it so that we force a mock backend

when we don't have an ajax url

lms/static/coffee/fixtures/staff_grading.html

+<section class="container">
+
+<div class="staff-grading" data-ajax_url="${ajax_url}">
+<h1>Staff grading</h1>
+<div class="breadcrumbs">
+</div>
+<div class="error-container">
+</div>
+<div class="message-container">
+</div>
+
+<! -- Problem List View -->
+<section class="problem-list-container">
+<h2>Instructions</h2>
+<div class="instructions">
+<p>This is the list of problems that current need to be graded in order to train the machine learning models. Each problem needs to be trained separately, and we have indicated the number of student submissions that need to be graded in order for a model to be generated. You can grade more than the minimum required number of submissions--this will improve the accuracy of machine learning, though with diminishing returns. You can see the current accuracy of machine learning while grading.</p>
+</div>
+
+<h2>Problem List</h2>
+    <table class="problem-list">
+    </table>
+</section>
+
+<!-- Grading View -->
+
+<section class="prompt-wrapper">
+    <h2 class="prompt-name"></h2>
+    <div class="meta-info-wrapper">
+        <h3>Problem Information</h3>
+        <div class="problem-meta-info-container">
+        </div>
+        <h3>Maching Learning Information</h3>
+        <div class="ml-error-info-container">
+        </div>
+    </div>
+    <div class="prompt-information-container">
+    <h3>Question</h3>
+        <div class="prompt-container">
+        </div>
+    </div>
+
+</section>
+
+<div class="action-button">
+    <input type=button value="Submit" class="action-button" name="show" />
+</div>
+
+<section class="grading-wrapper">
+<h2>Grading</h2>
+
+<div class="grading-container">
+<div class="submission-wrapper">
+<h3>Student Submission</h3>
+<div class="submission-container">
+</div>
+</div>
+<div class="evaluation">
+  <p class="score-selection-container">
+  </p>
+  <p class="grade-selection-container">
+  </p>
+  <textarea name="feedback" placeholder="Feedback for student (optional)"
+            class="feedback-area" cols="70" ></textarea>
+</div>
+  
+
+<div class="submission">
+<input type="button" value="Submit" class="submit-button" name="show"/>
+<input type="button" value="Skip" class="skip-button" name="skip"/>
+</div>
+
+</div>
+
+</div>
+</section>
+

lms/static/coffee/spec/staff_grading_spec.coffee

+describe 'StaffGrading', ->
+  beforeEach -> 
+    spyOn Logger, 'log'
+    @mockBackend = new StaffGradingBackend('url', true)
+
+  describe 'constructor', ->
+    beforeEach ->
+      @staff_grading = new StaffGrading(@mockBackend)
+
+    it 'we are originally in the list view', ->
+      expect(@staff_grading.list_view).toBe(true)

lms/static/coffee/src/staff_grading/staff_grading.coffee

@@ -9,9 +9,13 @@ state_graded = "graded"
 state_no_data = "no_data"
 state_error = "error"
 
-class StaffGradingBackend
+class @StaffGradingBackend
   constructor: (ajax_url, mock_backend) ->
     @ajax_url = ajax_url
+    # prevent this from trying to make requests when we don't have
+    # a proper url
+    if !ajax_url
+      mock_backend = true
     @mock_backend = mock_backend
     if @mock_backend
       @mock_cnt = 0
@@ -142,7 +146,7 @@ The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for t
         .error => callback({success: false, error: "Error occured while performing this operation"})
 
 
-class StaffGrading
+class @StaffGrading
   constructor: (backend) ->
     @backend = backend