Test controller method. Rspec - ruby-on-rails

Question

I want to test the controller method, but I can not find the example of testing method with order and search .
This is my controller:
class Admin::HotelsController < Admin::BaseController
helper_method :sort_column, :sort_direction
def index
#hotels = Hotel.search(params[:search], params[:search_column]).order(sort_column + ' ' + sort_direction)
end
def show
#hotel = Hotel.find(params[:id])
end
def update
#hotel = Hotel.find(params[:id])
if #hotel.update_attributes(hotel_params)
redirect_to admin_hotels_path
else
render(:edit)
end
end
private
def hotel_params
params.require(:hotel).permit(:title, :description, :user_id, :avatar, :price, :breakfast, :status, address_attributes: [:state, :country, :city, :street])
end
def sort_column
Hotel.column_names.include?(params[:sort]) ? params[:sort] : 'created_at'
end
def sort_direction
%w[asc desc].include?(params[:direction]) ? params[:direction] : 'asc'
end
end
This is test for this controller.
require 'rails_helper'
describe Admin::HotelsController do
login_admin
describe 'GET index' do
it 'render a list of hotels' do
hotel1, hotel2 = create(:hotel), create(:hotel)
get :index
expect(assigns(:hotels)).to match_array([hotel1, hotel2])
end
end
describe 'GET show' do
it 'should show hotel' do
#hotel = create(:hotel)
get :show, { id: #hotel.to_param, template: 'hotels/show' }
expect(response).to render_template :show
end
end
end
I don't know how testing index method. Please help or give me a link with information about this. Thanks!

Answer 1

If it may help you, I personally prefer to have minimals tests for the controllers for various reasons:
1) as I was beginning in rails testing I read many articles saying it's a good idea
2) it allows you to tests in isolation model methods:
describe 'GET index' do
it 'render a list of hotels' do
hotel1, hotel2 = create(:hotel), create(:hotel)
get :index
expect(assigns(:hotels)).to match_array([hotel1, hotel2])
end
end
here your test matches the result of your query on the model. You can split it like this:
describe 'GET index' do
it 'render a list of hotels' do
hotel1, hotel2 = create(:hotel), create(:hotel)
Hotel.should_receive(:search).with(YOUR PARAMS)
get :index
response.response_code.should == 200
end
end
and then test the result of Hotel.search in a model test.
3) it allows you to test the feature and not some random things that are not really relevant:
describe 'GET show' do
it 'should show hotel' do
#hotel = create(:hotel)
get :show, { id: #hotel.to_param, template: 'hotels/show' }
expect(response).to render_template :show
end
end
here "expect(response).to render_template :show" seems like testing that rails rendering system is properly working. I assume that's not what you want to test, you may prefer (that's what I would do):
describe 'GET show' do
it 'should show hotel' do
#hotel = create(:hotel)
Hotel.should_receive(:find).with(YOUR PARAMS)
get :show, { id: #hotel.to_param, template: 'hotels/show' }
response.response_code.should == 200
end
end
and then test what is supposed to appear on the web page with a feature test using something like capybara gem unless you're rendering some json: in this case match the json values in the controller.
By the way: "#hotel = create(:hotel)" the # is not necessary here as you're in the "it". Moreover you can create such entry like this:
context "" do
before(:each) do
#hotel = create(:hotel) # here the # is necessary for the variable to be
end # accessible in the it
it "" do
end
end
or even like this:
context "" do
let(:hotel) { create(:hotel) } # you can call it in the test by using hotel and it
it "" do # will be insert in you db only when it's in the "it"
end # if you want it to be created in the "it" without
end # calling hotel for nothing, use let!

Answer 2

I would suggest using
describe 'GET index' do
let(:hotel1) { create(:hotel) }
let(:hotel2) { create(:hotel) }
it 'render index template' do
get :index
expect(response).to render_template :index
end
it 'render asc ordered hotels' do
get :index
# if you are using json responses
json = JSON.parse(response.body)
expect(json['hotels'].first).to eq hotel1
expect(json['hotels'].last ).to eq hotel2
# or any similar approach to get test the hotels in response
end
it 'render desc ordered hotels' do
get :index, {direction: 'desc'}
# if you are using json responses
json = JSON.parse(response.body)
expect(json['hotels'].first).to eq hotel2
expect(json['hotels'].last ).to eq hotel1
# or any similar approach to get test the hotels in response
end
# you can complete these tests yourself
it 'render hotels sorted with different_column_than_created_at asc'
it 'render hotels sorted with different_column_than_created_at desc'
end