Add grape endpoint to list artworks

app/api/using_grape/artworks_endpoint.rb

@@ -0,0 +1,11 @@
+module UsingGrape
+  class ArtworksEndpoint < Grape::API
+    format :json
+
+    namespace :artworks do
+      get do
+        Artwork.all
+      end
+    end
+  end
+end

config/routes.rb

@@ -1,5 +1,9 @@
 Rails.application.routes.draw do
   namespace :api do
+    namespace :using_grape do
+      mount UsingGrape::ArtworksEndpoint, at: "/"
+    end
+
     namespace :using_nothing do
       resources :artworks
     end

spec/requests/using_grape/list_artworks_spec.rb

@@ -0,0 +1,33 @@
+require "rails_helper"
+
+describe "GET /api/using_grape/artworks" do
+  context "without any artworks" do
+    it "returns an empty array" do
+      get "/api/using_grape/artworks"
+      expect(response.status).to eq 200
+      expect(response.parsed_body).to eq []
+    end
+  end
+
+  context "with an artwork" do
+    let!(:artwork) { FactoryBot.create(:artwork) }
+
+    it "returns that artwork" do
+      get "/api/using_grape/artworks"
+      expect(response.status).to eq 200
+      expect(response.parsed_body).to eq [artwork].as_json
+    end
+  end
+
+  context "with a few artworks" do
+    before do
+      FactoryBot.create_list(:artwork, 3)
+    end
+
+    it "returns those artworks" do
+      get "/api/using_grape/artworks"
+      expect(response.status).to eq 200
+      expect(response.parsed_body.count).to eq 3
+    end
+  end
+end