Ruby JSON API with include_json and schema test

api_custom_spec.rb

# Json API Tests
# Para o código abaixo funcionar temos que configuras seguintes GEMS:
#  gem 'rspec-json_expectations'     # Utilizado no helper include_json 
#  gem 'json_matchers'               # Utilizado pelo helper match_response_schema ...

require 'rails_helper'

RSpec.describe "Customers", type: :request do
  describe "GET /customers" do

    it 'JSON Schema' do
      get '/customers/1.json'
      expect(response).to match_response_schema("customer")
    end

    it "works! 200 OK" do
      get customers_path
      expect(response).to have_http_status(200)
    end

    it "index - JSON" do
      get "/customers.json"
      expect(response.body).to include_json([
        id: /\d/,
        name: (be_kind_of String),
        email: (be_kind_of String)
      ])
    end

    it "show - JSON" do
      get "/customers/1.json"
      expect(response.body).to include_json(
        id: /\d/,
        name: (be_kind_of String),
        email: (be_kind_of String)
      )
    end

    it "show - Rspec puro + JSON" do
      get "/customers/1.json"
      response_body = JSON.parse(response.body)
      expect(response_body.fetch("id")).to eq(1)
      expect(response_body.fetch("name")).to be_kind_of(String)
      expect(response_body.fetch("email")).to be_kind_of(String)
    end

    it 'create - JSON' do
      member = create(:member)
      login_as(member, scope: :member)

      headers = { "ACCEPT" => "application/json"}

      customers_params = attributes_for(:customer)
      post "/customers.json", params: { customer: customers_params}, headers: headers

      expect(response.body).to include_json(
        id: /\d/,
        name: customers_params[:name],
        email: customers_params.fetch(:email)
      )
    end

    it 'update - JSON' do
      member = create(:member)
      login_as(member, scope: :member)

      headers = { "ACCEPT" => "application/json"}

      customers = Customer.first
      customers.name += " - ATUALIZADO"

      patch "/customers/#{customers.id}.json", params: { customer: customers.attributes}, headers: headers

      expect(response.body).to include_json(
        id: /\d/,
        name: customers.name,
        email: customers.email
      )
    end

    it 'destroy - JSON' do
      member = create(:member)
      login_as(member, scope: :member)

      headers = { "ACCEPT" => "application/json"}

      customers = Customer.first

      expect{ delete "/customers/#{customers.id}.json", headers: headers }.to change(Customer, :count).by(-1)
      expect(response).to have_http_status(204)
    end
  end
end