add action test to pagination links

test/action_controller/json_api/pagination_test.rb

@@ -0,0 +1,92 @@
+require 'test_helper'
+require 'will_paginate/array'
+require 'kaminari'
+require 'kaminari/hooks'
+::Kaminari::Hooks.init
+
+module ActionController
+  module Serialization
+    class JsonApi
+      class PaginationTest < ActionController::TestCase
+        class PaginationTestController < ActionController::Base
+          def setup
+            @array = [
+              Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' }),
+              Profile.new({ name: 'Name 2', description: 'Description 2', comments: 'Comments 2' }),
+              Profile.new({ name: 'Name 3', description: 'Description 3', comments: 'Comments 3' })
+            ]
+          end
+
+          def using_kaminari
+            setup
+            Kaminari.paginate_array(@array).page(params[:page]).per(params[:per_page])
+          end
+
+          def using_will_paginate
+            setup
+            @array.paginate(page: params[:page], per_page: params[:per_page])
+          end
+
+          def render_pagination_using_kaminari
+            render json: using_kaminari, adapter: :json_api, pagination: true
+          end
+
+          def render_pagination_using_will_paginate
+            render json: using_will_paginate, adapter: :json_api, pagination: true
+          end
+
+          def render_array_without_pagination_links
+            render json: using_will_paginate, adapter: :json_api, pagination: false
+          end
+
+          def render_array_omitting_pagination_options
+            render json: using_kaminari, adapter: :json_api
+          end
+        end
+
+        tests PaginationTestController
+
+        def test_render_pagination_links_with_will_paginate
+          expected_links = {"first"=>"?page=1&per_page=1", "prev"=>"?page=1&per_page=1", "next"=>"?page=3&per_page=1", "last"=>"?page=3&per_page=1"}
+
+          get :render_pagination_using_will_paginate, page: 2, per_page: 1
+          response = JSON.parse(@response.body)
+          assert_equal expected_links, response['links']
+        end
+
+        def test_render_only_last_and_next_pagination_links
+          expected_links = {"next"=>"?page=2&per_page=2", "last"=>"?page=2&per_page=2"}
+          get :render_pagination_using_will_paginate, page: 1, per_page: 2
+          response = JSON.parse(@response.body)
+          assert_equal expected_links, response['links']
+        end
+
+        def test_render_pagination_links_with_kaminari
+          expected_links = {"first"=>"?page=1&per_page=1", "prev"=>"?page=1&per_page=1", "next"=>"?page=3&per_page=1", "last"=>"?page=3&per_page=1"}
+          get :render_pagination_using_kaminari, page: 2, per_page: 1
+          response = JSON.parse(@response.body)
+          assert_equal expected_links, response['links']
+        end
+
+        def test_render_only_prev_and_first_pagination_links
+          expected_links = {"first"=>"?page=1&per_page=1", "prev"=>"?page=2&per_page=1"}
+          get :render_pagination_using_kaminari, page: 3, per_page: 1
+          response = JSON.parse(@response.body)
+          assert_equal expected_links, response['links']
+        end
+
+        def test_array_without_pagination_links
+          get :render_array_without_pagination_links
+          response = JSON.parse(@response.body)
+          refute response.key? 'links'
+        end
+
+        def test_array_omitting_pagination_options
+          get :render_array_omitting_pagination_options
+          response = JSON.parse(@response.body)
+          refute response.key? 'links'
+        end
+      end
+    end
+  end
+end