create subjects acceptance test

spec/acceptance/subjects_spec.rb

@@ -4,9 +4,10 @@ resource 'Subjects' do
   header 'Accept', 'application/json'
   header 'Content-Type', 'application/json'
 
-  before { 12.times { create(:subject) } }
+  before { 12.times { create(:subject); create(:learning_object) } }
 
-  let(:subjects) { Subject.all }
+  let(:subject) { Subject.all }
+  let(:learning_objects) { LearningObject.all }
 
   get '/v1/subjects' do
     parameter :limit, 'Limit of subjects'
@@ -22,4 +23,25 @@ resource 'Subjects' do
     end
   end
 
+  post 'v1/:type/:id/subjects' do
+    include_context "authenticate_user"
+
+    parameter :id, "The id of the object"
+    parameter :type, "Represents the type of the object [LearningObject, Collection]"
+    parameter :subjects, "The array of subjects"
+
+    let(:type) {'learning_objects'}
+    let(:id) {@learning_object.id}
+    let(:subjects) { [subject.first.id ] }
+    let(:raw_post) {params.to_json}
+
+    before do
+      @learning_object = create(:learning_object, publisher: @user)
+    end
+
+    example 'Adding subjects' do
+      do_request
+      expect(status).to eq(201)
+    end
+  end
 end