RSpec Cheatsheet

rspec_cheatsheet_controller_spec.rb

require 'rails_helper'

RSpec.describe TodosController, :type => :controller do

  describe "GET #index" do
  #describe "POST #create" do
  #describe "GET #show" do
  #describe "PATCH #update" do (or PUT #update)
  #describe "DELETE #destroy" do
  #describe "GET #new" do
  #describe "GET #edit" do
  
    
    # NORMALLY, you DO NOT want render_views, or you only want to call it in
    # a single context.
    # More on render_views: 
    # https://www.relishapp.com/rspec/rspec-rails/v/3-1/docs/controller-specs/render-views
    render_views # ONLY have this if you're certain you need it
    
    it "reads like a sentence (almost)" do
      
      # Available HTTP methods: post, get, patch, put, delete, head
      get :index
      
      params = { id: 123 }

      get :edit, params # old non-kwarg style
      get :edit, params: params # new kwarg style
      
      params = { widget: { description: 'Hello World' } }
      params.merge!(format: :js) # Specify format for AJAX/JS responses (e.g. create.js.erb view)
      
      post :create, params # old non-kwarg style
      post :create, params: params # new kwarg style
      
      # All optional kwargs:
      post :create,
        params: {}, # hash with HTTP parameters, may be nil
        body: "...", # request body string, appropriately encoded (application/x-www-form-urlencoded or multipart/form-data)
        session: {}, # hash of parameters to store in session, may be nil.
        flash: {}, # hash of parameters to store in flash, may be nil.
        format: :json, # Request format (string or symbol), defaults to nil.
        as: :json # Content type must be symbol that corresponds to a mime type, defaults to nil.
      
      # Testing 404s in controllers (assuming default Rails handling of RecordNotFound)
      expect { delete :destroy, { id: 'unknown' } }.to raise_error(ActiveRecord::RecordNotFound)
      
      # Rails `:symbolized` status codes at end of each status code page at http://httpstatus.es/
      expect(response).to have_http_status(:success) # 200
      expect(response).to have_http_status(:forbidden) # 403
      
      expect(response).to redirect_to foo_path
      expect(response).to render_template(:template_filename_without_extension)
      expect(response).to render_template(:destroy)
      
      # Need response.body? Requires render_views call outside "it" block (see above & read given URL)
      expect(response.body).to match /Bestsellers/ 
      expect(response.body).to include "Bestsellers"
      
      expect(response.headers["Content-Type"]).to eq "text/html; charset=utf-8"
      expect(response.headers["Content-Type"]).to eq "text/javascript; charset=utf-8"
      
      # assigns(:foobar) accesses the @foobar instance variable
      # the controller method made available to the view
      
      # Think of assigns(:widgets) as @widgets in the controller method
      expect(assigns(:widgets)).to eq([widget1, widget2, widget3])

      # Think of assigns(:product) as @product in the controller method
      expect(assigns(:product)).to eq(bestseller)
      expect(assigns(:cat)).to be_cool # cat.cool is a boolean, google "rspec predicate matchers"
      expect(assigns(:employee)).to be_a_new(Employee) 
      
    
      # Asserting flash messages
      expect(flash[:notice]).to eq "Congratulations on buying our stuff!"
      expect(flash[:error]).to eq "Buying our stuff failed :-("
      expect(flash[:alert]).to eq "You didn't buy any of our stuff!!!"
      
      # Query the db to assert changes persisted
      expect(Invoice.count).to eq(1)
      
      # Reload from db an object fetched in test setup when its record in db
      # is updated by controller method, otherwise you're testing stale data
      employee.reload
      invoice.reload
      product.reload
      widget.reload

    end
    
  end

end

render_template's dependency is in a separate gem. Rspec no longer does this without it:

assert_template has been extracted to a gem. To continue using it,
        add `gem 'rails-controller-testing'` to your Gemfile.

This is amazing

Really nice!!! =)

You should add follow_redirect! to this.

Thanks a lot

assigns was soft-deprecated in RSpec 3.5 and will be deprecated in the future. It's considered that dealing with or testing the instance variables of the controller you are testing the internals rather than the response of controller.

It's Perfect cheatsheet but i didn't found request header merge for authentication token in this cheatsheet

request.headers.merge!('Authorization': "Bearer #{token}")

fuck] this