Add tests for has_one polymorphic

test/fixtures/poro.rb

@@ -38,6 +38,12 @@ end
 class WebLog < Model
 end
 
+class Interview < Model
+  def attachment
+    @attachment ||= Image.new(url: 'U1')
+  end
+end
+
 class Mail < Model
   def attachments
     @attachments ||= [Image.new(url: 'U1'),
@@ -87,6 +93,12 @@ class WebLogLowerCamelSerializer < WebLogSerializer
   format_keys :lower_camel
 end
 
+class InterviewSerializer < ActiveModel::Serializer
+  attributes :text
+
+  has_one :attachment, polymorphic: true
+end
+
 class MailSerializer < ActiveModel::Serializer
   attributes :body
 

test/unit/active_model/serializer/has_one_polymorphic_test.rb

@@ -0,0 +1,196 @@
+require 'test_helper'
+
+module ActiveModel
+  class Serializer
+    class HasOnePolymorphicTest < ActiveModel::TestCase
+      def setup
+        @association = InterviewSerializer._associations[:attachment]
+        @old_association = @association.dup
+
+        @interview = Interview.new({ text: 'Text 1' })
+        @interview_serializer = InterviewSerializer.new(@interview)
+      end
+
+      def teardown
+        InterviewSerializer._associations[:attachment] = @old_association
+      end
+
+      def model_name(object)
+        object.class.to_s.demodulize.underscore.to_sym
+      end
+
+      def test_associations_definition
+        assert_equal 1, InterviewSerializer._associations.length
+        assert_kind_of Association::HasOne, @association
+        assert_equal true, @association.polymorphic
+        assert_equal 'attachment', @association.name
+      end
+
+      def test_associations_embedding_ids_serialization_using_serializable_hash
+        @association.embed = :ids
+
+        assert_equal({
+          text: 'Text 1',
+          'attachment_id' => {
+            type: model_name(@interview.attachment),
+            id: @interview.attachment.object_id
+          }
+        }, @interview_serializer.serializable_hash)
+      end
+
+      def test_associations_embedding_ids_serialization_using_as_json
+        @association.embed = :ids
+
+        assert_equal({
+          'interview' => {
+            text: 'Text 1',
+            'attachment_id' => {
+              type: model_name(@interview.attachment),
+              id: @interview.attachment.object_id
+            }
+          }
+        }, @interview_serializer.as_json)
+      end
+
+      def test_associations_embedding_ids_serialization_using_serializable_hash_and_key_from_options
+        @association.embed = :ids
+        @association.key = 'key'
+
+        assert_equal({
+          text: 'Text 1',
+          'key' => {
+            type: model_name(@interview.attachment),
+            id: @interview.attachment.object_id
+          }
+        }, @interview_serializer.serializable_hash)
+      end
+
+      def test_associations_embedding_objects_serialization_using_serializable_hash
+        @association.embed = :objects
+
+        assert_equal({
+          text: 'Text 1',
+          attachment: {
+            type: model_name(@interview.attachment),
+            model_name(@interview.attachment) => { url: 'U1'}
+          }
+        }, @interview_serializer.serializable_hash)
+      end
+
+      def test_associations_embedding_objects_serialization_using_as_json
+        @association.embed = :objects
+
+        assert_equal({
+          'interview' => {
+            text: 'Text 1',
+            attachment: {
+              type: model_name(@interview.attachment),
+              model_name(@interview.attachment) => { url: 'U1'}
+            }
+          }
+        }, @interview_serializer.as_json)
+      end
+
+      def test_associations_embedding_nil_ids_serialization_using_as_json
+        @association.embed = :ids
+        @interview.instance_eval do
+          def attachment
+            nil
+          end
+        end
+
+        assert_equal({
+          'interview' => { text: 'Text 1', 'attachment_id' => nil }
+        }, @interview_serializer.as_json)
+      end
+
+      def test_associations_embedding_nil_objects_serialization_using_as_json
+        @association.embed = :objects
+        @interview.instance_eval do
+          def attachment
+            nil
+          end
+        end
+
+        assert_equal({
+          'interview' => { text: 'Text 1', attachment: nil }
+        }, @interview_serializer.as_json)
+      end
+
+      def test_associations_embedding_objects_serialization_using_serializable_hash_and_root_from_options
+        @association.embed = :objects
+        @association.embedded_key = 'root'
+
+        assert_equal({
+          text: 'Text 1',
+          'root' => {
+            type: model_name(@interview.attachment),
+            model_name(@interview.attachment) => { url: 'U1'}
+          }
+        }, @interview_serializer.serializable_hash)
+      end
+
+      def test_associations_embedding_ids_including_objects_serialization_using_serializable_hash
+        @association.embed = :ids
+        @association.embed_in_root = true
+
+        assert_equal({
+          text: 'Text 1',
+          'attachment_id' => {
+            type: model_name(@interview.attachment),
+            id: @interview.attachment.object_id
+          }
+        }, @interview_serializer.serializable_hash)
+      end
+
+      def test_associations_embedding_ids_including_objects_serialization_using_as_json
+        @association.embed = :ids
+        @association.embed_in_root = true
+
+        assert_equal({
+          'interview' => {
+            text: 'Text 1',
+            'attachment_id' => {
+              type: model_name(@interview.attachment),
+              id: @interview.attachment.object_id
+            }
+          },
+          "attachments" => [{
+            type: model_name(@interview.attachment),
+            model_name(@interview.attachment) => {
+              url: 'U1'
+            }
+          }]
+        }, @interview_serializer.as_json)
+      end
+
+      def test_associations_using_a_given_serializer
+        @association.embed = :ids
+        @association.embed_in_root = true
+        @association.serializer_from_options = Class.new(ActiveModel::Serializer) do
+          def name
+            'fake'
+          end
+
+          attributes :name
+        end
+
+        assert_equal({
+          'interview' => {
+            text: 'Text 1',
+            'attachment_id' => {
+              type: model_name(@interview.attachment),
+              id: @interview.attachment.object_id
+            }
+          },
+          "attachments" => [{
+            type: model_name(@interview.attachment),
+            model_name(@interview.attachment) => {
+              name: 'fake'
+            }
+          }]
+        }, @interview_serializer.as_json)
+      end
+    end
+  end
+end