Refactor some code

lib/gitlab/github_import/pull_request_formatter.rb

@@ -38,8 +38,8 @@ module Gitlab
 
       def source_branch_name
         @source_branch_name ||= begin
-          if source_branch.repo.id != target_branch.repo.id
-            "pull/#{number}/#{source_branch.repo.full_name}/#{source_branch_ref}"
+          if cross_project?
+            "pull/#{number}/#{source_branch_repo.full_name}/#{source_branch_ref}"
           else
             source_branch_exists? ? source_branch_ref : "pull/#{number}/#{source_branch_ref}"
           end
@@ -56,6 +56,10 @@ module Gitlab
         end
       end
 
+      def cross_project?
+        source_branch.repo.id != target_branch.repo.id
+      end
+
       private
 
       def state

spec/lib/gitlab/github_import/pull_request_formatter_spec.rb

@@ -281,6 +281,24 @@ describe Gitlab::GithubImport::PullRequestFormatter, lib: true do
     end
   end
 
+  describe '#cross_project?' do
+    context 'when source and target repositories are different' do
+      let(:raw_data) { double(base_data.merge(head: forked_branch)) }
+
+      it 'returns true' do
+        expect(pull_request.cross_project?).to eq true
+      end
+    end
+
+    context 'when source and target repositories are the same' do
+      let(:raw_data) { double(base_data.merge(head: source_branch)) }
+
+      it 'returns false' do
+        expect(pull_request.cross_project?).to eq false
+      end
+    end
+  end
+
   describe '#url' do
     let(:raw_data) { double(base_data) }