Add charts controller and specs

app/controllers/charts_controller.rb

@@ -3,4 +3,14 @@ class ChartsController < ApplicationController
   def index
   end  
 
+  def show
+    chart_config = Charts::Config.config[params[:name]]
+    @chart = Charts::Chart.new(
+                  params[:chart_name].to_s.capitalize, 
+                  chart_config[:request_url], 
+                  chart_config[:storage_key]
+                  )
+    render json: @chart.chart_data              
+  end  
+
 end

config/charts.yml

@@ -1,11 +1,17 @@
-
 development:
   bitcoin:
     storage_key: "btc_usd"
     request_url: "https://bitbay.net/API/Public/BTCUSD/ticker.json"
   ethereum:
     storage_key: "eth_usd"
     request_url: "https://bitbay.net/API/Public/ETHUSD/ticker.json"  
+test:
+  bitcoin:
+    storage_key: "btc_usd"
+    request_url: "https://bitbay.net/API/Public/BTCUSD/ticker.json"
+  ethereum:
+    storage_key: "eth_usd"
+    request_url: "https://bitbay.net/API/Public/ETHUSD/ticker.json"      
 production:     
   bitcoin:
     storage_key: "btc_usd"

config/routes.rb

@@ -1,3 +1,4 @@
 Rails.application.routes.draw do
   root to: "charts#index"
+  get "charts/:name", to: "charts#show", as: :chart
 end

spec/controllers/charts_controller_spec.rb

@@ -0,0 +1,33 @@
+require "rails_helper"
+require 'charts'
+
+describe ChartsController, type: :controller do
+
+  let(:api_request) { Charts::ApiRequest.new(bitbay_request_url)  }
+  let(:storage) { Charts::ResponseStorage.new(api_request, "btc_usd")  }
+
+  context "when there is chart data" do 
+    before do  
+      stub_bitbay_successfull_response
+      storage.store_request
+    end   
+
+    it "returns chart data" do 
+      get :show, params: { name: "bitcoin" }
+      expect(response).to be_success
+      expect(JSON.parse(response.body)).to eq(storage.values) 
+    end  
+
+  end  
+
+  context "when there is no chart data" do 
+
+    it "returns empty array" do 
+      get :show, params: { name: "ethereum" }
+      expect(response).to be_success
+      expect(JSON.parse(response.body)).to eq([]) 
+    end  
+
+  end  
+
+end   

spec/rails_helper.rb

@@ -13,6 +13,7 @@
   config.use_transactional_fixtures = false 
   config.include Features
   config.include Requests::Bitbay
+  config.include Requests::JsonHelpers, type: :request
   config.infer_spec_type_from_file_location!
   config.filter_rails_from_backtrace!
 end

spec/support/requests.rb

@@ -1,4 +1,5 @@
 module Requests
 end
 
-require_relative "requests/bitbay"  
+require_relative "requests/bitbay"  
+require_relative "requests/json_helpers/request_helpers"  

spec/support/requests/json_helpers/request_helpers.rb

@@ -0,0 +1,7 @@
+module Requests
+  module JsonHelpers
+    def json
+      JSON.parse(response.body)
+    end
+  end
+end