it "does not create a new Spreadsheet with invalid month" do
            valid_spreadsheet_id = "https://docs.google.com/spreadsheets/d/1tIuyylSNMianWOxUQCvHhYQGb8tONDDVyliWQemWwBM/edit#gid=408995429"
            post :create, {:ca => {:link => valid_spreadsheet_id, :month => 13, :year => 2016}}
            expect(response).to redirect_to(new_spreadsheet_path)
            expect(flash[:error]).to be_present