Move global milestone specs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/services/milestones/collection_service.rb

-module Milestones
-  class CollectionService < Milestones::BaseService
-    def initialize(project_milestones)
-      @project_milestones = project_milestones.group_by(&:title)
-    end
-
-    def execute
-      build(@project_milestones)
-    end
-
-    def milestone(title)
-      if title
-        group_milestone = @project_milestones[title].group_by(&:title)
-        build(group_milestone).first
-      else
-        nil
-      end
-    end
-
-    private
-
-    def build(milestone)
-      milestone.map{ |title, milestones| GroupMilestone.new(title, milestones) }
-    end
-  end
-end

spec/services/milestones/group_service_spec.rb → spec/models/global_milestone_spec.rb

 require 'spec_helper'
 
-describe Milestones::GroupService do
+describe GlobalMilestone do
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let(:group) { create(:group) }
@@ -14,8 +14,7 @@ describe Milestones::GroupService do
   let(:milestone2_project2) { create(:milestone, title: "VD-123", project: project2) }
   let(:milestone2_project3) { create(:milestone, title: "VD-123", project: project3) }
 
-  describe 'execute' do
-    context 'with valid projects' do
+  describe :build_collection do
     before do
       milestones =
         [
@@ -26,45 +25,41 @@ describe Milestones::GroupService do
           milestone2_project2,
           milestone2_project3
         ]
-        @group_milestones = Milestones::GroupService.new(milestones).execute
+
+      @global_milestones = GlobalMilestone.build_collection(milestones)
     end
 
     it 'should have all project milestones' do
-        expect(@group_milestones.count).to eq(2)
+      expect(@global_milestones.count).to eq(2)
     end
 
     it 'should have all project milestones titles' do
-        expect(@group_milestones.map { |group_milestone| group_milestone.title }).to match_array(['Milestone v1.2', 'VD-123'])
+      expect(@global_milestones.map(&:title)).to match_array(['Milestone v1.2', 'VD-123'])
     end
 
     it 'should have all project milestones' do
-        expect(@group_milestones.map { |group_milestone| group_milestone.milestones.count }.sum).to eq(6)
-      end
+      expect(@global_milestones.map { |group_milestone| group_milestone.milestones.count }.sum).to eq(6)
     end
   end
 
-  describe 'milestone' do
-    context 'with valid title' do
+  describe :initialize do
     before do
       milestones =
         [
           milestone1_project1,
           milestone1_project2,
           milestone1_project3,
-            milestone2_project1,
-            milestone2_project2,
-            milestone2_project3
         ]
-        @group_milestones = Milestones::GroupService.new(milestones).milestone('Milestone v1.2')
+
+      @global_milestone = GlobalMilestone.new(milestone1_project1.title, milestones)
     end
 
     it 'should have exactly one group milestone' do
-        expect(@group_milestones.title).to eq('Milestone v1.2')
+      expect(@global_milestone.title).to eq('Milestone v1.2')
     end
 
     it 'should have all project milestones with the same title' do
-        expect(@group_milestones.milestones.count).to eq(3)
-      end
+      expect(@global_milestone.milestones.count).to eq(3)
     end
   end
 end