Implement pipeline status factory with extended status

lib/gitlab/ci/status/pipeline/factory.rb

+module Gitlab
+  module Ci
+    module Status
+      module Pipeline
+        class Factory
+          EXTENDED_STATUSES = [Pipeline::SuccessWithWarnings]
+
+          def initialize(pipeline)
+            @pipeline = pipeline
+            @status = pipeline.status || :created
+          end
+
+          def fabricate!
+            if extended_status
+              extended_status.new(core_status)
+            else
+              core_status
+            end
+          end
+
+          private
+
+          def core_status
+            Gitlab::Ci::Status
+              .const_get(@status.capitalize)
+              .new(@pipeline)
+              .extend(Status::Pipeline::Common)
+          end
+
+          def extended_status
+            @extended ||= EXTENDED_STATUSES.find do |status|
+              status.matches?(@pipeline)
+            end
+          end
+        end
+      end
+    end
+  end
+end

spec/lib/gitlab/ci/status/pipeline/factory_spec.rb

+require 'spec_helper'
+
+describe Gitlab::Ci::Status::Pipeline::Factory do
+  subject do
+    described_class.new(pipeline)
+  end
+
+  context 'when pipeline has a core status' do
+    HasStatus::AVAILABLE_STATUSES.each do |core_status|
+      context "when core status is #{core_status}" do
+        let(:pipeline) do
+          create(:ci_pipeline, status: core_status)
+        end
+
+        it "fabricates a core status #{core_status}" do
+          expect(subject.fabricate!)
+            .to be_a Gitlab::Ci::Status.const_get(core_status.capitalize)
+        end
+      end
+    end
+  end
+
+  context 'when pipeline has warnings' do
+    let(:pipeline) do
+      create(:ci_pipeline, status: :success)
+    end
+
+    before do
+      create(:ci_build, :allowed_to_fail, :failed, pipeline: pipeline)
+    end
+
+    it 'fabricates extended "success with warnings" status' do
+      expect(subject.fabricate!)
+        .to be_a Gitlab::Ci::Status::Pipeline::SuccessWithWarnings
+    end
+  end
+end