Add spec for refresh service adding notes to restored branches

app/services/merge_requests/refresh_service.rb

@@ -90,9 +90,8 @@ module MergeRequests
             # Since any number of commits could have been made to the restored branch,
             # find the common root to see what has been added.
             common_ref = @project.repository.merge_base(last_commit.id, @newrev)
-            # If the last_commit no longer exists in this new branch,
-            # gitlab_git throws a Rugged::OdbError
-            # This is fixed in https://gitlab.com/gitlab-org/gitlab_git/merge_requests/52
+            # If the a commit no longer exists in this repo, gitlab_git throws
+            # a Rugged::OdbError. This is fixed in https://gitlab.com/gitlab-org/gitlab_git/merge_requests/52
             @commits = @project.repository.commits_between(common_ref, @newrev) if common_ref
           rescue
           end

spec/services/merge_requests/refresh_service_spec.rb

@@ -108,21 +108,23 @@ describe MergeRequests::RefreshService do
 
     context 'push new branch that exists in a merge request' do
       let(:refresh_service) { service.new(@fork_project, @user) }
-      before do
-        allow(refresh_service).to receive(:execute_hooks)
+
+      it 'refreshes the merge request' do
+        expect(refresh_service).to receive(:execute_hooks).
+                                       with(@fork_merge_request, 'update')
+        allow_any_instance_of(Repository).to receive(:merge_base).and_return(@oldrev)
+
         refresh_service.execute(Gitlab::Git::BLANK_SHA, @newrev, 'refs/heads/master')
         reload_mrs
-      end
 
-      it 'should execute hooks with update action' do
-        expect(refresh_service).to have_received(:execute_hooks).
-                                       with(@fork_merge_request, 'update')
-      end
+        expect(@merge_request.notes).to be_empty
+        expect(@merge_request).to be_open
 
-      it { expect(@merge_request.notes).to be_empty }
-      it { expect(@merge_request).to be_open }
-      it { expect(@fork_merge_request.notes.last.note).to include('Source branch `master` restored') }
-      it { expect(@fork_merge_request).to be_open }
+        notes = @fork_merge_request.notes.reorder(:created_at).map(&:note)
+        expect(notes[0]).to include('Source branch `master` restored')
+        expect(notes[1]).to include('Added 4 commits')
+        expect(@fork_merge_request).to be_open
+      end
     end
 
     def reload_mrs

spec/services/system_note_service_spec.rb

@@ -229,7 +229,7 @@ describe SystemNoteService do
   end
 
   describe '.change_branch' do
-    subject { described_class.change_branch(noteable, project, author, :target, old_branch, new_branch) }
+    subject { described_class.change_branch(noteable, project, author, 'target', old_branch, new_branch) }
     let(:old_branch) { 'old_branch'}
     let(:new_branch) { 'new_branch'}
 
@@ -243,7 +243,7 @@ describe SystemNoteService do
   end
 
   describe '.change_branch_presence' do
-    subject { described_class.change_branch_presence(noteable, project, author, 'source', 'feature', :delete) }
+    subject { described_class.change_branch_presence(noteable, project, author, :source, 'feature', :delete) }
 
     it_behaves_like 'a system note'