added tests

spec/concerns/lti_spec.rb

@@ -107,6 +107,13 @@ describe Lti do
     let(:consumer) { FactoryGirl.create(:consumer) }
     let(:score) { 0.5 }
 
+    context 'with an invalid score' do
+      it 'raises an exception' do
+        expect { controller.send(:send_score, Lti::MAXIMUM_SCORE * 2) }.to raise_error(Lti::Error)
+      end
+    end
+
+    context 'with an valid score' do
       context 'with a tool provider' do
         before(:each) do
           controller.session[:consumer_id] = consumer.id
@@ -152,6 +159,7 @@ describe Lti do
         end
       end
     end
+  end
 
   describe '#store_lti_session_data' do
     let(:parameters) { {} }