Added tests for MRs

lib/gitlab/background_migration/fix_cross_project_label_links.rb

@@ -106,7 +106,7 @@ module Gitlab
 
           next unless matching_label
 
-          LabelLink.find(label.label_link_id).update!(label_id: matching_label.id)
+          LabelLink.update(label.label_link_id, label_id: matching_label.id)
         end
       end
 

spec/lib/gitlab/background_migration/fix_cross_project_label_links_spec.rb

@@ -17,66 +17,93 @@ describe Gitlab::BackgroundMigration::FixCrossProjectLabelLinks, :migration, sch
   let!(:label1) { labels_table.create(id: 1, title: 'bug', color: 'red', group_id: 10, type: 'GroupLabel') }
   let!(:label2) { labels_table.create(id: 2, title: 'bug', color: 'red', group_id: 20, type: 'GroupLabel') }
 
-  let(:merge_request) do
-    merge_requests_table.create(target_project_id: project.id,
+  def create_merge_request(id, project_id)
+    merge_requests_table.create(id: id,
+                                target_project_id: project_id,
                                 target_branch: 'master',
-                                source_project_id: project.id,
+                                source_project_id: project_id,
                                 source_branch: 'mr name',
-                                title: 'mr name')
+                                title: "mr name#{id}")
   end
 
-  it 'updates cross-project label links which exist in the local project or group' do
-    issues_table.create(id: 1, title: 'issue1', project_id: 1)
-    link = label_links_table.create(label_id: 2, target_type: 'Issue', target_id: 1)
-
-    subject.perform(1, 100)
-
-    expect(link.reload.label_id).to eq(1)
+  def create_issue(id, project_id)
+    issues_table.create(id: id, title: "issue#{id}", project_id: project_id)
   end
 
-  it 'ignores cross-project label links if label color is different' do
-    labels_table.create(id: 3, title: 'bug', color: 'green', group_id: 20, type: 'GroupLabel')
-    issues_table.create(id: 1, title: 'issue1', project_id: 1)
-    link = label_links_table.create(label_id: 3, target_type: 'Issue', target_id: 1)
+  def create_resource(target_type, id, project_id)
+    target_type == 'Issue' ? create_issue(id, project_id) : create_merge_request(id, project_id)
+  end
 
-    subject.perform(1, 100)
+  shared_examples_for 'resource with cross-project labels' do
+    it 'updates only cross-project label links which exist in the local project or group' do
+      create_resource(target_type, 1, 1)
+      create_resource(target_type, 2, 3)
+      labels_table.create(id: 3, title: 'bug', color: 'red', project_id: 3, type: 'ProjectLabel')
+      link = label_links_table.create(label_id: 2, target_type: target_type, target_id: 1)
+      link2 = label_links_table.create(label_id: 3, target_type: target_type, target_id: 2)
 
-    expect(link.reload.label_id).to eq(3)
-  end
+      subject.perform(1, 100)
 
-  it 'ignores cross-project label links if label name is different' do
-    labels_table.create(id: 3, title: 'bug1', color: 'red', group_id: 20, type: 'GroupLabel')
-    issues_table.create(id: 1, title: 'issue1', project_id: 1)
-    link = label_links_table.create(label_id: 3, target_type: 'Issue', target_id: 1)
+      expect(link.reload.label_id).to eq(1)
+      expect(link2.reload.label_id).to eq(3)
+    end
 
-    subject.perform(1, 100)
+    it 'ignores cross-project label links if label color is different' do
+      labels_table.create(id: 3, title: 'bug', color: 'green', group_id: 20, type: 'GroupLabel')
+      create_resource(target_type, 1, 1)
+      link = label_links_table.create(label_id: 3, target_type: target_type, target_id: 1)
 
-    expect(link.reload.label_id).to eq(3)
-  end
+      subject.perform(1, 100)
 
-  context 'with nested group' do
-    before do
-      namespaces_table.create(id: 11, type: 'Group', name: 'subgroup1', path: 'group1/subgroup1', parent_id: 10)
-      projects_table.create(id: 2, name: 'subproject1', path: 'group1/subgroup1/subproject1', namespace_id: 11)
-      issues_table.create(id: 1, title: 'issue1', project_id: 2)
+      expect(link.reload.label_id).to eq(3)
     end
 
-    it 'ignores label links referencing ancestor group labels', :nested_groups do
-      labels_table.create(id: 4, title: 'bug', color: 'red', project_id: 2, type: 'ProjectLabel')
-      label_links_table.create(label_id: 4, target_type: 'Issue', target_id: 1)
-      link = label_links_table.create(label_id: 1, target_type: 'Issue', target_id: 1)
+    it 'ignores cross-project label links if label name is different' do
+      labels_table.create(id: 3, title: 'bug1', color: 'red', group_id: 20, type: 'GroupLabel')
+      create_resource(target_type, 1, 1)
+      link = label_links_table.create(label_id: 3, target_type: target_type, target_id: 1)
 
       subject.perform(1, 100)
 
-      expect(link.reload.label_id).to eq(1)
+      expect(link.reload.label_id).to eq(3)
     end
 
-    it 'checks also issues and MRs in subgroups', :nested_groups do
-      link = label_links_table.create(label_id: 2, target_type: 'Issue', target_id: 1)
+    context 'with nested group' do
+      before do
+        namespaces_table.create(id: 11, type: 'Group', name: 'subgroup1', path: 'group1/subgroup1', parent_id: 10)
+        projects_table.create(id: 2, name: 'subproject1', path: 'group1/subgroup1/subproject1', namespace_id: 11)
+        create_resource(target_type, 1, 2)
+      end
 
-      subject.perform(1, 100)
+      it 'ignores label links referencing ancestor group labels', :nested_groups do
+        labels_table.create(id: 4, title: 'bug', color: 'red', project_id: 2, type: 'ProjectLabel')
+        label_links_table.create(label_id: 4, target_type: target_type, target_id: 1)
+        link = label_links_table.create(label_id: 1, target_type: target_type, target_id: 1)
 
-      expect(link.reload.label_id).to eq(1)
+        subject.perform(1, 100)
+
+        expect(link.reload.label_id).to eq(1)
+      end
+
+      it 'checks also issues and MRs in subgroups', :nested_groups do
+        link = label_links_table.create(label_id: 2, target_type: target_type, target_id: 1)
+
+        subject.perform(1, 100)
+
+        expect(link.reload.label_id).to eq(1)
+      end
+    end
+  end
+
+  context 'resource is Issue' do
+    it_behaves_like 'resource with cross-project labels' do
+      let(:target_type) { 'Issue' }
+    end
+  end
+
+  context 'resource is Merge Request' do
+    it_behaves_like 'resource with cross-project labels' do
+      let(:target_type) { 'MergeRequest' }
     end
   end
 end