Set GitHub milestones to Issue/Merge Request that were imported

lib/gitlab/github_import/issue_formatter.rb

@@ -5,6 +5,7 @@ module Gitlab
         {
           iid: number,
           project: project,
+          milestone: milestone,
           title: raw_data.title,
           description: description,
           state: state,
@@ -55,6 +56,12 @@ module Gitlab
         @formatter.author_line(author) + body
       end
 
+      def milestone
+        if raw_data.milestone.present?
+          project.milestones.find_by(iid: raw_data.milestone.number)
+        end
+      end
+
       def state
         raw_data.state == 'closed' ? 'closed' : 'opened'
       end

lib/gitlab/github_import/pull_request_formatter.rb

@@ -11,6 +11,7 @@ module Gitlab
           target_project: target_project,
           target_branch: target_branch.name,
           state: state,
+          milestone: milestone,
           author_id: author_id,
           assignee_id: assignee_id,
           created_at: raw_data.created_at,
@@ -58,6 +59,12 @@ module Gitlab
         formatter.author_line(author) + body
       end
 
+      def milestone
+        if raw_data.milestone.present?
+          project.milestones.find_by(iid: raw_data.milestone.number)
+        end
+      end
+
       def source_project
         project
       end

spec/lib/gitlab/github_import/issue_formatter_spec.rb

@@ -32,6 +32,7 @@ describe Gitlab::GithubImport::IssueFormatter, lib: true do
         expected = {
           iid: 1347,
           project: project,
+          milestone: nil,
           title: 'Found a bug',
           description: "*Created by: octocat*\n\nI'm having a problem with this.",
           state: 'opened',
@@ -53,6 +54,7 @@ describe Gitlab::GithubImport::IssueFormatter, lib: true do
         expected = {
           iid: 1347,
           project: project,
+          milestone: nil,
           title: 'Found a bug',
           description: "*Created by: octocat*\n\nI'm having a problem with this.",
           state: 'closed',
@@ -80,6 +82,21 @@ describe Gitlab::GithubImport::IssueFormatter, lib: true do
       end
     end
 
+    context 'when it has a milestone' do
+      let(:milestone) { OpenStruct.new(number: 45) }
+      let(:raw_data) { OpenStruct.new(base_data.merge(milestone: milestone)) }
+
+      it 'returns nil when milestone does not exist' do
+        expect(issue.attributes.fetch(:milestone)).to be_nil
+      end
+
+      it 'returns milestone when it exists' do
+        milestone = create(:milestone, project: project, iid: 45)
+
+        expect(issue.attributes.fetch(:milestone)).to eq milestone
+      end
+    end
+
     context 'when author is a GitLab user' do
       let(:raw_data) { OpenStruct.new(base_data.merge(user: octocat)) }
 

spec/lib/gitlab/github_import/pull_request_formatter_spec.rb

@@ -43,6 +43,7 @@ describe Gitlab::GithubImport::PullRequestFormatter, lib: true do
           target_project: project,
           target_branch: 'master',
           state: 'opened',
+          milestone: nil,
           author_id: project.creator_id,
           assignee_id: nil,
           created_at: created_at,
@@ -67,6 +68,7 @@ describe Gitlab::GithubImport::PullRequestFormatter, lib: true do
           target_project: project,
           target_branch: 'master',
           state: 'closed',
+          milestone: nil,
           author_id: project.creator_id,
           assignee_id: nil,
           created_at: created_at,
@@ -91,6 +93,7 @@ describe Gitlab::GithubImport::PullRequestFormatter, lib: true do
           target_project: project,
           target_branch: 'master',
           state: 'merged',
+          milestone: nil,
           author_id: project.creator_id,
           assignee_id: nil,
           created_at: created_at,
@@ -128,6 +131,21 @@ describe Gitlab::GithubImport::PullRequestFormatter, lib: true do
         expect(pull_request.attributes.fetch(:author_id)).to eq gl_user.id
       end
     end
+
+    context 'when it has a milestone' do
+      let(:milestone) { OpenStruct.new(number: 45) }
+      let(:raw_data) { OpenStruct.new(base_data.merge(milestone: milestone)) }
+
+      it 'returns nil when milestone does not exists' do
+        expect(pull_request.attributes.fetch(:milestone)).to be_nil
+      end
+
+      it 'returns milestone when is exists' do
+        milestone = create(:milestone, project: project, iid: 45)
+
+        expect(pull_request.attributes.fetch(:milestone)).to eq milestone
+      end
+    end
   end
 
   describe '#number' do