with_status to represent_status

app/serializers/build_entity.rb

@@ -18,10 +18,7 @@ class BuildEntity < Grape::Entity
   expose :created_at
   expose :updated_at
-
-  expose :details do
-    expose :detailed_status, as: :status, with: StatusEntity
-  end
+  expose :detailed_status, as: :status, with: StatusEntity
   private

app/serializers/build_serializer.rb

 class BuildSerializer < BaseSerializer
   entity BuildEntity
-  def only_status
-    tap { @status_only = { only: [{ details: [:status] }] } }
-  end
-
   def represent(resource, opts = {})
-    if @status_only.present?
-      opts.merge!(@status_only)
-    end
-
     super(resource, opts)
   end
+
+  def represent_status(resource)
+    data = represent(resource, { only: [:status] })
+    data[:status]
+  end
 end

app/serializers/pipeline_serializer.rb

@@ -11,23 +11,20 @@ class PipelineSerializer < BaseSerializer
     @paginator.present?
   end
-  def only_status
-    tap { @status_only = { only: [{ details: [:status] }] } }
-  end
-
   def represent(resource, opts = {})
     if resource.is_a?(ActiveRecord::Relation)
       resource = resource.includes(project: :namespace)
     end
-    if @status_only.present?
-      opts.merge!(@status_only)
-    end
-
     if paginated?
       super(@paginator.paginate(resource), opts)
     else
       super(resource, opts)
     end
   end
+
+  def represent_status(resource)
+    data = represent(resource, { only: [{ details: [:status] }] })
+    data[:details][:status]
+  end
 end

spec/serializers/build_serializer_spec.rb

@@ -10,16 +10,20 @@ describe BuildSerializer do
   subject { serializer.represent(resource) }
   describe '#represent' do
-    context 'when used with status' do
-      let(:serializer) do
-        described_class.new(user: user)
-          .only_status
+    # TODO:
+  end
+
+  describe '#represent_status' do
+    context 'when represents only status' do
+      let(:status) do
+        Gitlab::Ci::Status::Success.new(double('object'), double('user'))
       end
-      let(:resource) { create(:ci_build) }
+      let(:resource) { create(:ci_build, status: :success) }
+
+      subject { serializer.represent_status(resource) }
       it 'serializes only status' do
-        expect(subject[:details][:status]).not_to be_empty
-        expect(subject[:details].keys.count).to eq 1
+        expect(subject[:favicon]).to eq(status.favicon)
       end
     end
   end

spec/serializers/pipeline_serializer_spec.rb

@@ -93,17 +93,19 @@ describe PipelineSerializer do
         end
       end
     end
-    context 'when used with status' do
-      let(:serializer) do
-        described_class.new(user: user)
-          .only_status
+  end
+  describe '#represent_status' do
+    context 'when represents only status' do
+      let(:status) do
+        Gitlab::Ci::Status::Success.new(double('object'), double('user'))
       end
-      let(:resource) { create(:ci_empty_pipeline) }
+      let(:resource) { create(:ci_pipeline, status: :success) }
+
+      subject { serializer.represent_status(resource) }
       it 'serializes only status' do
-        expect(subject[:details][:status]).not_to be_empty
-        expect(subject[:details].keys.count).to eq 1
+        expect(subject[:favicon]).to eq(status.favicon)
       end
     end
   end