Added todo controller tests for merge requests

spec/controllers/projects/todo_controller_spec.rb

 require('spec_helper')
 
 describe Projects::TodosController do
-  let(:user)    { create(:user) }
-  let(:project) { create(:project) }
-  let(:issue)   { create(:issue, project: project) }
-
-  describe 'POST #create' do
-    before do
-      sign_in(user)
-      project.team << [user, :developer]
+  let(:user)          { create(:user) }
+  let(:project)       { create(:project) }
+  let(:issue)         { create(:issue, project: project) }
+  let(:merge_request) { create(:merge_request, source_project: project) }
+
+  context 'Issues' do
+    describe 'POST #create' do
+      before do
+        sign_in(user)
+        project.team << [user, :developer]
+      end
+
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: issue.id,
+                        issuable_type: "issue")
+        end.to change { user.todos.count }.by(1)
+
+        expect(response.status).to eq(200)
+      end
     end
 
-    it 'should create todo for issue' do
-      expect do
-        post(:create, namespace_id: project.namespace.path,
-                      project_id: project.path,
-                      issuable_id: issue.id,
-                      issuable_type: "issue")
-      end.to change { user.todos.count }.by(1)
+    describe 'POST #create when not authorized' do
+      before do
+        sign_in(user)
+      end
 
-      expect(response.status).to eq(200)
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: issue.id,
+                        issuable_type: "issue")
+        end.to change { user.todos.count }.by(0)
+
+        expect(response.status).to eq(404)
+      end
+    end
+
+    describe 'POST #create when not logged in' do
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: issue.id,
+                        issuable_type: "issue")
+        end.to change { user.todos.count }.by(0)
+
+        expect(response.status).to eq(302)
+      end
     end
   end
 
-  describe 'POST #create when not authorized' do
-    before do
-      sign_in(user)
+  context 'Merge Requests' do
+    describe 'POST #create' do
+      before do
+        sign_in(user)
+        project.team << [user, :developer]
+      end
+
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: merge_request.id,
+                        issuable_type: "merge_request")
+        end.to change { user.todos.count }.by(1)
+
+        expect(response.status).to eq(200)
+      end
     end
 
-    it 'should create todo for issue' do
-      expect do
-        post(:create, namespace_id: project.namespace.path,
-                      project_id: project.path,
-                      issuable_id: issue.id,
-                      issuable_type: "issue")
-      end.to change { user.todos.count }.by(0)
+    describe 'POST #create when not authorized' do
+      before do
+        sign_in(user)
+      end
 
-      expect(response.status).to eq(404)
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: merge_request.id,
+                        issuable_type: "merge_request")
+        end.to change { user.todos.count }.by(0)
+
+        expect(response.status).to eq(404)
+      end
     end
-  end
 
-  describe 'POST #create when not logged in' do
-    it 'should create todo for issue' do
-      expect do
-        post(:create, namespace_id: project.namespace.path,
-                      project_id: project.path,
-                      issuable_id: issue.id,
-                      issuable_type: "issue")
-      end.to change { user.todos.count }.by(0)
+    describe 'POST #create when not logged in' do
+      it 'should create todo for issue' do
+        expect do
+          post(:create, namespace_id: project.namespace.path,
+                        project_id: project.path,
+                        issuable_id: merge_request.id,
+                        issuable_type: "merge_request")
+        end.to change { user.todos.count }.by(0)
 
-      expect(response.status).to eq(302)
+        expect(response.status).to eq(302)
+      end
     end
   end
 end