fix display when tests are completely broken

Author: Ben Lerner

app/views/grades/_show_simple_list.html.erb

@@ -1,4 +1,7 @@
 <div id="tests">
+  <% if @tests.nil %>
+  <pre><%= @grading_output.output %></pre>
+  <% else %>
   <% @tests.each_with_index do |t, i| %>
     <% if t[:passed]
          style = "alert-success"
@@ -38,4 +41,5 @@
       <% end %>
     </div>
   <% end %>  
+  <% end %>  
 </div>

lib/json_parser.rb

@@ -1,13 +1,14 @@
 class JsonParser
-  attr_reader :json, :test_count, :tests, :commentary, :passed_count, :time_taken
+  attr_reader :json, :test_count, :tests, :commentary, :passed_count, :time_taken, :output
   attr_reader :filename
   attr_reader :score, :max_score
 
   def initialize(json, filename=nil)
     @filename = filename
     @json = json
-    @test_count = json['tests'].count
-    @tests = json['tests'].map.with_index do |t, num|
+    @test_count = json['tests']&.count
+    @output = json['output']
+    @tests = json['tests']&.map.with_index do |t, num|
       t = t.clone
       weight = t.delete('weight') || t.delete('max_score') || t.delete('max-score')
       score = t.delete('score')
@@ -30,8 +31,8 @@ def initialize(json, filename=nil)
         }
       end
     end
-    @passed_count = @tests.count { |t| t[:passed] }
-    @score = @json['score']
-    @max_score = @json['max-score']
+    @passed_count = @tests&.count { |t| t[:passed] } || 0
+    @score = @json['score'] || 0
+    @max_score = @json['max-score'] || 0
   end
 end