feat: teach JR in tests to parse the response (#1437)

* feat: teach JR in tests to parse the response

* use response.parsed_body instead of JSON.parse when evaluating responses in tests

---------

Co-authored-by: lgebhardt <larry@cerebris.com>

Author: bf4

lib/jsonapi/resources/railtie.rb

@@ -6,6 +6,19 @@ class Railtie < ::Rails::Railtie
       rake_tasks do
         load 'tasks/check_upgrade.rake'
       end
+
+
+      initializer "jsonapi_resources.testing", after: :initialize do
+        next unless Rails.env.test?
+        # Make response.parsed_body work
+        ActionDispatch::IntegrationTest.register_encoder :api_json,
+          param_encoder: ->(params) {
+            params
+          },
+          response_parser: ->(body) {
+            JSONAPI::MimeTypes.parser.call(body)
+          }
+      end
     end
   end
 end

test/helpers/functional_helpers.rb

@@ -53,7 +53,7 @@ module FunctionalHelpers
     # end
     #
     def json_response
-      JSON.parse(@response.body)
+      @response.parsed_body
     end
   end
-end
+end

test/integration/requests/request_test.rb

@@ -73,21 +73,21 @@ def test_post_sessions
       'Accept' => JSONAPI::MEDIA_TYPE
     }
     assert_jsonapi_response 201
-    json_body = JSON.parse(response.body)
+    json_body = response.parsed_body
     session_id = json_body["data"]["id"]
 
     # Get what we just created
     get "/sessions/#{session_id}?include=responses"
     assert_jsonapi_response 200
-    json_body = JSON.parse(response.body)
+    json_body = response.parsed_body
 
     assert(json_body.is_a?(Object));
     assert(json_body["included"].is_a?(Array));
     assert_equal("single_textbox", json_body["included"][0]["attributes"]["response_type"]["single_textbox"]);
 
     get "/sessions/#{session_id}?include=responses,responses.paragraph"
     assert_jsonapi_response 200
-    json_body = JSON.parse(response.body)
+    json_body = response.parsed_body
 
     assert_equal("single_textbox", json_body["included"][0]["attributes"]["response_type"]["single_textbox"]);
 
@@ -348,7 +348,7 @@ def test_post_polymorphic_with_has_many_relationship
 
     assert_jsonapi_response 201
 
-    body = JSON.parse(response.body)
+    body = response.parsed_body
     person = Person.find(body.dig("data", "id"))
 
     assert_equal "Reo", person.name
@@ -649,7 +649,7 @@ def test_patch_polymorphic_with_has_many_relationship
 
     assert_jsonapi_response 200
 
-    body = JSON.parse(response.body)
+    body = response.parsed_body
     person = Person.find(body.dig("data", "id"))
 
     assert_equal "Reo", person.name