tests for #mr_closes_issues and #mr_issues_mentioned_but_not_closing in MergeRequestsHelper

changelogs/unreleased/pass in current_user in MergeRequest and MergeRequestsHelper.yml

+---
+title: pass in current_user in MergeRequest and MergeRequestsHelper
+merge_request: 8624
+author: Dongqing Hu

spec/helpers/merge_requests_helper_spec.rb

@@ -77,4 +77,86 @@ describe MergeRequestsHelper do
       expect(mr_widget_refresh_url(nil)).to end_with('')
     end
   end
+
+  describe '#mr_closes_issues' do
+    let(:user_1) { create(:user) }
+    let(:user_2) { create(:user) }
+
+    let(:project_1) { create(:project, :private, creator: user_1, namespace: user_1.namespace) }
+    let(:project_2) { create(:project, :private, creator: user_2, namespace: user_2.namespace) }
+
+    let(:issue_1) { create(:issue, project: project_1) }
+    let(:issue_2) { create(:issue, project: project_2) }
+
+    let(:merge_request) { create(:merge_request, source_project: project_1, target_project: project_1,) }
+
+    let(:merge_request) do
+      create(:merge_request,
+             source_project: project_1, target_project: project_1,
+             description: "Fixes #{issue_1.to_reference} Fixes #{issue_2.to_reference(project_1)}")
+    end
+
+    before do
+      project_1.team << [user_2, :developer]
+      project_2.team << [user_2, :developer]
+      allow(merge_request.project).to receive(:default_branch).and_return(merge_request.target_branch)
+      @merge_request = merge_request
+    end
+
+    context 'user without access to another private project' do
+      let(:current_user) { user_1 }
+
+      it 'cannot see that project\'s issue that will be closed on acceptance' do
+        expect(mr_closes_issues).to contain_exactly(issue_1)
+      end
+    end
+
+    context 'user with access to another private project' do
+      let(:current_user) { user_2 }
+
+      it 'can see that project\'s issue that will be closed on acceptance' do
+        expect(mr_closes_issues).to contain_exactly(issue_1, issue_2)
+      end
+    end
+  end
+
+  describe '#mr_issues_mentioned_but_not_closing' do
+    let(:user_1) { create(:user) }
+    let(:user_2) { create(:user) }
+
+    let(:project_1) { create(:project, :private, creator: user_1, namespace: user_1.namespace) }
+    let(:project_2) { create(:project, :private, creator: user_2, namespace: user_2.namespace) }
+
+    let(:issue_1) { create(:issue, project: project_1) }
+    let(:issue_2) { create(:issue, project: project_2) }
+
+    let(:merge_request) do
+      create(:merge_request,
+             source_project: project_1, target_project: project_1,
+             description: "#{issue_1.to_reference} #{issue_2.to_reference(project_1)}")
+    end
+
+    before do
+      project_1.team << [user_2, :developer]
+      project_2.team << [user_2, :developer]
+      allow(merge_request.project).to receive(:default_branch).and_return(merge_request.target_branch)
+      @merge_request = merge_request
+    end
+
+    context 'user without access to another private project' do
+      let(:current_user) { user_1 }
+
+      it 'cannot see that project\'s issue that will be closed on acceptance' do
+        expect(mr_issues_mentioned_but_not_closing).to contain_exactly(issue_1)
+      end
+    end
+
+    context 'user with access to another private project' do
+      let(:current_user) { user_2 }
+
+      it 'can see that project\'s issue that will be closed on acceptance' do
+        expect(mr_issues_mentioned_but_not_closing).to contain_exactly(issue_1, issue_2)
+      end
+    end
+  end
 end