Merge remote-tracking branch 'upstream/master' into pipeline-emails

* upstream/master: (372 commits)
  Enable Lint/StringConversionInInterpolation cop and autocorrect offenses
  resolve duplicated changelog entry
  credit myself :smile:
  change determine conditions
  override subject method in devise mailer
  follow the styleguide: Don't use parentheses around a literal
  wrap subject with method subject
  move spec back into shared example `an email sent from GitLab`
  stub config settings in spec
  remove empty line at block body end
  remove extra entry
  create new test in `spec/mailers/notify_spec.rb`
  move changelog to 8.13
  add configurable email subject suffix
  Fixes sidebar navigation.
  Convert "SSH Keys" Spinach features to RSpec
  Enable import/export back for non-admins
  Update gitlab-shell to 3.6.3
  Updated artwork of empty group state.
  Better empty state for Groups view.
  ...

15 files changed, 405 insertions, 73 deletions

diff --git a/spec/services/boards/issues/list_service_spec.rb b/spec/services/boards/issues/list_service_spec.rb
index cf4c5f13635..e65da15aca8 100644
--- a/spec/services/boards/issues/list_service_spec.rb
+++ b/spec/services/boards/issues/list_service_spec.rb
@@ -13,10 +13,10 @@ describe Boards::Issues::ListService, services: true do
     let(:p2) { create(:label, title: 'P2', project: project, priority: 2) }
     let(:p3) { create(:label, title: 'P3', project: project, priority: 3) }
 
-    let!(:backlog) { create(:backlog_list, board: board) }
+    let!(:backlog) { project.board.backlog_list }
     let!(:list1)   { create(:list, board: board, label: development, position: 0) }
     let!(:list2)   { create(:list, board: board, label: testing, position: 1) }
-    let!(:done)    { create(:done_list, board: board) }
+    let!(:done)    { project.board.done_list }
 
     let!(:opened_issue1) { create(:labeled_issue, project: project, labels: [bug]) }
     let!(:opened_issue2) { create(:labeled_issue, project: project, labels: [p2]) }
diff --git a/spec/services/boards/issues/move_service_spec.rb b/spec/services/boards/issues/move_service_spec.rb
index 0122159cab8..180f1b08631 100644
--- a/spec/services/boards/issues/move_service_spec.rb
+++ b/spec/services/boards/issues/move_service_spec.rb
@@ -10,10 +10,10 @@ describe Boards::Issues::MoveService, services: true do
     let(:development) { create(:label, project: project, name: 'Development') }
     let(:testing)  { create(:label, project: project, name: 'Testing') }
 
-    let!(:backlog) { create(:backlog_list, board: board) }
+    let!(:backlog) { project.board.backlog_list }
     let!(:list1)   { create(:list, board: board, label: development, position: 0) }
     let!(:list2)   { create(:list, board: board, label: testing, position: 1) }
-    let!(:done)    { create(:done_list, board: board) }
+    let!(:done)    { project.board.done_list }
 
     before do
       project.team << [user, :developer]
diff --git a/spec/services/boards/lists/create_service_spec.rb b/spec/services/boards/lists/create_service_spec.rb
index 90764b86b16..bff9c1fd1fe 100644
--- a/spec/services/boards/lists/create_service_spec.rb
+++ b/spec/services/boards/lists/create_service_spec.rb
@@ -17,17 +17,15 @@ describe Boards::Lists::CreateService, services: true do
       end
     end
 
-    context 'when board lists has only a backlog list' do
+    context 'when board lists has backlog, and done lists' do
       it 'creates a new list at beginning of the list' do
-        create(:backlog_list, board: board)
-
         list = service.execute
 
         expect(list.position).to eq 0
       end
     end
 
-    context 'when board lists has only labels lists' do
+    context 'when board lists has labels lists' do
       it 'creates a new list at end of the lists' do
         create(:list, board: board, position: 0)
         create(:list, board: board, position: 1)
@@ -40,8 +38,6 @@ describe Boards::Lists::CreateService, services: true do
 
     context 'when board lists has backlog, label and done lists' do
       it 'creates a new list at end of the label lists' do
-        create(:backlog_list, board: board)
-        create(:done_list, board: board)
         list1 = create(:list, board: board, position: 0)
 
         list2 = service.execute
diff --git a/spec/services/boards/lists/destroy_service_spec.rb b/spec/services/boards/lists/destroy_service_spec.rb
index 6eff445feee..474c4512471 100644
--- a/spec/services/boards/lists/destroy_service_spec.rb
+++ b/spec/services/boards/lists/destroy_service_spec.rb
@@ -15,11 +15,11 @@ describe Boards::Lists::DestroyService, services: true do
       end
 
       it 'decrements position of higher lists' do
-        backlog     = create(:backlog_list, board: board)
+        backlog     = project.board.backlog_list
         development = create(:list, board: board, position: 0)
         review      = create(:list, board: board, position: 1)
         staging     = create(:list, board: board, position: 2)
-        done        = create(:done_list, board: board)
+        done        = project.board.done_list
 
         described_class.new(project, user).execute(development)
 
@@ -31,14 +31,14 @@ describe Boards::Lists::DestroyService, services: true do
     end
 
     it 'does not remove list from board when list type is backlog' do
-      list = create(:backlog_list, board: board)
+      list = project.board.backlog_list
       service = described_class.new(project, user)
 
       expect { service.execute(list) }.not_to change(board.lists, :count)
     end
 
     it 'does not remove list from board when list type is done' do
-      list = create(:done_list, board: board)
+      list = project.board.done_list
       service = described_class.new(project, user)
 
       expect { service.execute(list) }.not_to change(board.lists, :count)
diff --git a/spec/services/boards/lists/move_service_spec.rb b/spec/services/boards/lists/move_service_spec.rb
index 3e9b7d07fc6..102ed67449d 100644
--- a/spec/services/boards/lists/move_service_spec.rb
+++ b/spec/services/boards/lists/move_service_spec.rb
@@ -6,12 +6,12 @@ describe Boards::Lists::MoveService, services: true do
     let(:board)   { project.board }
     let(:user)    { create(:user) }
 
-    let!(:backlog)     { create(:backlog_list, board: board) }
+    let!(:backlog)     { project.board.backlog_list }
     let!(:planning)    { create(:list, board: board, position: 0) }
     let!(:development) { create(:list, board: board, position: 1) }
     let!(:review)      { create(:list, board: board, position: 2) }
     let!(:staging)     { create(:list, board: board, position: 3) }
-    let!(:done)        { create(:done_list, board: board) }
+    let!(:done)        { project.board.done_list }
 
     context 'when list type is set to label' do
       it 'keeps position of lists when new position is nil' do
diff --git a/spec/services/issues/create_service_spec.rb b/spec/services/issues/create_service_spec.rb
index 58569ba96c3..1050502fa19 100644
--- a/spec/services/issues/create_service_spec.rb
+++ b/spec/services/issues/create_service_spec.rb
@@ -20,16 +20,38 @@ describe Issues::CreateService, services: true do
       let(:opts) do
         { title: 'Awesome issue',
           description: 'please fix',
-          assignee: assignee,
+          assignee_id: assignee.id,
           label_ids: labels.map(&:id),
-          milestone_id: milestone.id }
+          milestone_id: milestone.id,
+          due_date: Date.tomorrow }
       end
 
-      it { expect(issue).to be_valid }
-      it { expect(issue.title).to eq('Awesome issue') }
-      it { expect(issue.assignee).to eq assignee }
-      it { expect(issue.labels).to match_array labels }
-      it { expect(issue.milestone).to eq milestone }
+      it 'creates the issue with the given params' do
+        expect(issue).to be_persisted
+        expect(issue.title).to eq('Awesome issue')
+        expect(issue.assignee).to eq assignee
+        expect(issue.labels).to match_array labels
+        expect(issue.milestone).to eq milestone
+        expect(issue.due_date).to eq Date.tomorrow
+      end
+
+      context 'when current user cannot admin issues in the project' do
+        let(:guest) { create(:user) }
+        before do
+          project.team << [guest, :guest]
+        end
+
+        it 'filters out params that cannot be set without the :admin_issue permission' do
+          issue = described_class.new(project, guest, opts).execute
+
+          expect(issue).to be_persisted
+          expect(issue.title).to eq('Awesome issue')
+          expect(issue.assignee).to be_nil
+          expect(issue.labels).to be_empty
+          expect(issue.milestone).to be_nil
+          expect(issue.due_date).to be_nil
+        end
+      end
 
       it 'creates a pending todo for new assignee' do
         attributes = {
diff --git a/spec/services/issues/update_service_spec.rb b/spec/services/issues/update_service_spec.rb
index 4f5375a3583..1638a46ed51 100644
--- a/spec/services/issues/update_service_spec.rb
+++ b/spec/services/issues/update_service_spec.rb
@@ -32,55 +32,84 @@ describe Issues::UpdateService, services: true do
       described_class.new(project, user, opts).execute(issue)
     end
 
-    context "valid params" do
-      before do
-        opts = {
+    context 'valid params' do
+      let(:opts) do
+        {
           title: 'New title',
           description: 'Also please fix',
           assignee_id: user2.id,
           state_event: 'close',
-          label_ids: [label.id]
+          label_ids: [label.id],
+          due_date: Date.tomorrow
         }
-
-        perform_enqueued_jobs do
-          update_issue(opts)
-        end
       end
 
-      it { expect(issue).to be_valid }
-      it { expect(issue.title).to eq('New title') }
-      it { expect(issue.assignee).to eq(user2) }
-      it { expect(issue).to be_closed }
-      it { expect(issue.labels.count).to eq(1) }
-      it { expect(issue.labels.first.title).to eq(label.name) }
-
-      it 'sends email to user2 about assign of new issue and email to user3 about issue unassignment' do
-        deliveries = ActionMailer::Base.deliveries
-        email = deliveries.last
-        recipients = deliveries.last(2).map(&:to).flatten
-        expect(recipients).to include(user2.email, user3.email)
-        expect(email.subject).to include(issue.title)
+      it 'updates the issue with the given params' do
+        update_issue(opts)
+
+        expect(issue).to be_valid
+        expect(issue.title).to eq 'New title'
+        expect(issue.description).to eq 'Also please fix'
+        expect(issue.assignee).to eq user2
+        expect(issue).to be_closed
+        expect(issue.labels).to match_array [label]
+        expect(issue.due_date).to eq Date.tomorrow
       end
 
-      it 'creates system note about issue reassign' do
-        note = find_note('Reassigned to')
+      context 'when current user cannot admin issues in the project' do
+        let(:guest) { create(:user) }
+        before do
+          project.team << [guest, :guest]
+        end
 
-        expect(note).not_to be_nil
-        expect(note.note).to include "Reassigned to \@#{user2.username}"
+        it 'filters out params that cannot be set without the :admin_issue permission' do
+          described_class.new(project, guest, opts).execute(issue)
+
+          expect(issue).to be_valid
+          expect(issue.title).to eq 'New title'
+          expect(issue.description).to eq 'Also please fix'
+          expect(issue.assignee).to eq user3
+          expect(issue.labels).to be_empty
+          expect(issue.milestone).to be_nil
+          expect(issue.due_date).to be_nil
+        end
       end
 
-      it 'creates system note about issue label edit' do
-        note = find_note('Added ~')
+      context 'with background jobs processed' do
+        before do
+          perform_enqueued_jobs do
+            update_issue(opts)
+          end
+        end
+
+        it 'sends email to user2 about assign of new issue and email to user3 about issue unassignment' do
+          deliveries = ActionMailer::Base.deliveries
+          email = deliveries.last
+          recipients = deliveries.last(2).map(&:to).flatten
+          expect(recipients).to include(user2.email, user3.email)
+          expect(email.subject).to include(issue.title)
+        end
 
-        expect(note).not_to be_nil
-        expect(note.note).to include "Added ~#{label.id} label"
-      end
+        it 'creates system note about issue reassign' do
+          note = find_note('Reassigned to')
 
-      it 'creates system note about title change' do
-        note = find_note('Changed title:')
+          expect(note).not_to be_nil
+          expect(note.note).to include "Reassigned to \@#{user2.username}"
+        end
 
-        expect(note).not_to be_nil
-        expect(note.note).to eq 'Changed title: **{-Old-} title** → **{+New+} title**'
+        it 'creates system note about issue label edit' do
+          note = find_note('Added ~')
+
+          expect(note).not_to be_nil
+          expect(note.note).to include "Added ~#{label.id} label"
+        end
+
+        it 'creates system note about title change' do
+          note = find_note('Changed title:')
+
+          expect(note).not_to be_nil
+          expect(note.note).to eq 'Changed title: **{-Old-} title** → **{+New+} title**'
+        end
       end
     end
 
diff --git a/spec/services/members/approve_access_request_service_spec.rb b/spec/services/members/approve_access_request_service_spec.rb
new file mode 100644
index 00000000000..03e296259f9
--- /dev/null
+++ b/spec/services/members/approve_access_request_service_spec.rb
@@ -0,0 +1,96 @@
+require 'spec_helper'
+
+describe Members::ApproveAccessRequestService, services: true do
+  let(:user) { create(:user) }
+  let(:access_requester) { create(:user) }
+  let(:project) { create(:project, :public) }
+  let(:group) { create(:group, :public) }
+
+  shared_examples 'a service raising ActiveRecord::RecordNotFound' do
+    it 'raises ActiveRecord::RecordNotFound' do
+      expect { described_class.new(source, user, params).execute }.to raise_error(ActiveRecord::RecordNotFound)
+    end
+  end
+
+  shared_examples 'a service raising Gitlab::Access::AccessDeniedError' do
+    it 'raises Gitlab::Access::AccessDeniedError' do
+      expect { described_class.new(source, user, params).execute }.to raise_error(Gitlab::Access::AccessDeniedError)
+    end
+  end
+
+  shared_examples 'a service approving an access request' do
+    it 'succeeds' do
+      expect { described_class.new(source, user, params).execute }.to change { source.requesters.count }.by(-1)
+    end
+
+    it 'returns a <Source>Member' do
+      member = described_class.new(source, user, params).execute
+
+      expect(member).to be_a "#{source.class}Member".constantize
+      expect(member.requested_at).to be_nil
+    end
+
+    context 'with a custom access level' do
+      let(:params) { { user_id: access_requester.id, access_level: Gitlab::Access::MASTER } }
+
+      it 'returns a ProjectMember with the custom access level' do
+        member = described_class.new(source, user, params).execute
+
+        expect(member.access_level).to eq Gitlab::Access::MASTER
+      end
+    end
+  end
+
+  context 'when no access requester are found' do
+    let(:params) { { user_id: 42 } }
+
+    it_behaves_like 'a service raising ActiveRecord::RecordNotFound' do
+      let(:source) { project }
+    end
+
+    it_behaves_like 'a service raising ActiveRecord::RecordNotFound' do
+      let(:source) { group }
+    end
+  end
+
+  context 'when an access requester is found' do
+    before do
+      project.request_access(access_requester)
+      group.request_access(access_requester)
+    end
+    let(:params) { { user_id: access_requester.id } }
+
+    context 'when current user cannot approve access request to the project' do
+      it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+        let(:source) { project }
+      end
+
+      it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+        let(:source) { group }
+      end
+    end
+
+    context 'when current user can approve access request to the project' do
+      before do
+        project.team << [user, :master]
+        group.add_owner(user)
+      end
+
+      it_behaves_like 'a service approving an access request' do
+        let(:source) { project }
+      end
+
+      it_behaves_like 'a service approving an access request' do
+        let(:source) { group }
+      end
+
+      context 'when given a :id' do
+        let(:params) { { id: project.requesters.find_by!(user_id: access_requester.id).id } }
+
+        it_behaves_like 'a service approving an access request' do
+          let(:source) { project }
+        end
+      end
+    end
+  end
+end
diff --git a/spec/services/members/request_access_service_spec.rb b/spec/services/members/request_access_service_spec.rb
new file mode 100644
index 00000000000..0d2d5f03199
--- /dev/null
+++ b/spec/services/members/request_access_service_spec.rb
@@ -0,0 +1,57 @@
+require 'spec_helper'
+
+describe Members::RequestAccessService, services: true do
+  let(:user) { create(:user) }
+  let(:project) { create(:project, :private) }
+  let(:group) { create(:group, :private) }
+
+  shared_examples 'a service raising Gitlab::Access::AccessDeniedError' do
+    it 'raises Gitlab::Access::AccessDeniedError' do
+      expect { described_class.new(source, user).execute }.to raise_error(Gitlab::Access::AccessDeniedError)
+    end
+  end
+
+  shared_examples 'a service creating a access request' do
+    it 'succeeds' do
+      expect { described_class.new(source, user).execute }.to change { source.requesters.count }.by(1)
+    end
+
+    it 'returns a <Source>Member' do
+      member = described_class.new(source, user).execute
+
+      expect(member).to be_a "#{source.class}Member".constantize
+      expect(member.requested_at).to be_present
+    end
+  end
+
+  context 'when source is nil' do
+    it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+      let(:source) { nil }
+    end
+  end
+
+  context 'when current user cannot request access to the project' do
+    it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+      let(:source) { project }
+    end
+
+    it_behaves_like 'a service raising Gitlab::Access::AccessDeniedError' do
+      let(:source) { group }
+    end
+  end
+
+  context 'when current user can request access to the project' do
+    before do
+      project.update(visibility_level: Gitlab::VisibilityLevel::PUBLIC)
+      group.update(visibility_level: Gitlab::VisibilityLevel::PUBLIC)
+    end
+
+    it_behaves_like 'a service creating a access request' do
+      let(:source) { project }
+    end
+
+    it_behaves_like 'a service creating a access request' do
+      let(:source) { group }
+    end
+  end
+end
diff --git a/spec/services/merge_requests/merge_service_spec.rb b/spec/services/merge_requests/merge_service_spec.rb
index 159f6817e8d..31167675d07 100644
--- a/spec/services/merge_requests/merge_service_spec.rb
+++ b/spec/services/merge_requests/merge_service_spec.rb
@@ -38,6 +38,30 @@ describe MergeRequests::MergeService, services: true do
       end
     end
 
+    context 'closes related todos' do
+      let(:merge_request) { create(:merge_request, assignee: user, author: user) }
+      let(:project) { merge_request.project }
+      let(:service) { MergeRequests::MergeService.new(project, user, commit_message: 'Awesome message') }
+      let!(:todo) do
+        create(:todo, :assigned,
+          project: project,
+          author: user,
+          user: user,
+          target: merge_request)
+      end
+
+      before do
+        allow(service).to receive(:execute_hooks)
+
+        perform_enqueued_jobs do
+          service.execute(merge_request)
+          todo.reload
+        end
+      end
+
+      it { expect(todo).to be_done }
+    end
+
     context 'remove source branch by author' do
       let(:service) do
         merge_request.merge_params['force_remove_source_branch'] = '1'
diff --git a/spec/services/merge_requests/refresh_service_spec.rb b/spec/services/merge_requests/refresh_service_spec.rb
index a162df5fc34..59d3912018a 100644
--- a/spec/services/merge_requests/refresh_service_spec.rb
+++ b/spec/services/merge_requests/refresh_service_spec.rb
@@ -79,8 +79,8 @@ describe MergeRequests::RefreshService, services: true do
       it { expect(@merge_request).to be_merged }
       it { expect(@fork_merge_request).to be_merged }
       it { expect(@fork_merge_request.notes.last.note).to include('changed to merged') }
-      it { expect(@build_failed_todo).to be_pending }
-      it { expect(@fork_build_failed_todo).to be_pending }
+      it { expect(@build_failed_todo).to be_done }
+      it { expect(@fork_build_failed_todo).to be_done }
     end
 
     context 'manual merge of source branch' do
@@ -99,8 +99,8 @@ describe MergeRequests::RefreshService, services: true do
       it { expect(@merge_request.diffs.size).to be > 0 }
       it { expect(@fork_merge_request).to be_merged }
       it { expect(@fork_merge_request.notes.last.note).to include('changed to merged') }
-      it { expect(@build_failed_todo).to be_pending }
-      it { expect(@fork_build_failed_todo).to be_pending }
+      it { expect(@build_failed_todo).to be_done }
+      it { expect(@fork_build_failed_todo).to be_done }
     end
 
     context 'push to fork repo source branch' do
@@ -149,8 +149,8 @@ describe MergeRequests::RefreshService, services: true do
       it { expect(@merge_request).to be_merged }
       it { expect(@fork_merge_request).to be_open }
       it { expect(@fork_merge_request.notes).to be_empty }
-      it { expect(@build_failed_todo).to be_pending }
-      it { expect(@fork_build_failed_todo).to be_pending }
+      it { expect(@build_failed_todo).to be_done }
+      it { expect(@fork_build_failed_todo).to be_done }
     end
 
     context 'push new branch that exists in a merge request' do
diff --git a/spec/services/notification_service_spec.rb b/spec/services/notification_service_spec.rb
index 0d152534c38..d820646ebdf 100644
--- a/spec/services/notification_service_spec.rb
+++ b/spec/services/notification_service_spec.rb
@@ -962,6 +962,20 @@ describe NotificationService, services: true do
         should_not_email(@u_lazy_participant)
       end
 
+      it "notifies the merger when merge_when_build_succeeds is true" do
+        merge_request.merge_when_build_succeeds = true
+        notification.merge_mr(merge_request, @u_watcher)
+
+        should_email(@u_watcher)
+      end
+
+      it "does not notify the merger when merge_when_build_succeeds is false" do
+        merge_request.merge_when_build_succeeds = false
+        notification.merge_mr(merge_request, @u_watcher)
+
+        should_not_email(@u_watcher)
+      end
+
       context 'participating' do
         context 'by assignee' do
           before do
diff --git a/spec/services/projects/import_service_spec.rb b/spec/services/projects/import_service_spec.rb
index d5d4d7c56ef..ed1384798ab 100644
--- a/spec/services/projects/import_service_spec.rb
+++ b/spec/services/projects/import_service_spec.rb
@@ -108,6 +108,16 @@ describe Projects::ImportService, services: true do
         expect(result[:status]).to eq :error
         expect(result[:message]).to eq 'Github: failed to connect API'
       end
+
+      it 'expires existence cache after error' do
+        allow_any_instance_of(Project).to receive(:repository_exists?).and_return(true)
+
+        expect_any_instance_of(Gitlab::Shell).to receive(:import_repository).with(project.repository_storage_path, project.path_with_namespace, project.import_url).and_raise(Gitlab::Shell::Error.new('Failed to import the repository'))
+        expect_any_instance_of(Repository).to receive(:expire_emptiness_caches).and_call_original
+        expect_any_instance_of(Repository).to receive(:expire_exists_cache).and_call_original
+
+        subject.execute
+      end
     end
 
     def stub_github_omniauth_provider
diff --git a/spec/services/slash_commands/interpret_service_spec.rb b/spec/services/slash_commands/interpret_service_spec.rb
index a616275e883..ae4d286d250 100644
--- a/spec/services/slash_commands/interpret_service_spec.rb
+++ b/spec/services/slash_commands/interpret_service_spec.rb
@@ -1,19 +1,19 @@
 require 'spec_helper'
 
 describe SlashCommands::InterpretService, services: true do
-  let(:project) { create(:project) }
-  let(:user) { create(:user) }
+  let(:project) { create(:empty_project, :public) }
+  let(:developer) { create(:user) }
   let(:issue) { create(:issue, project: project) }
   let(:milestone) { create(:milestone, project: project, title: '9.10') }
   let(:inprogress) { create(:label, project: project, title: 'In Progress') }
   let(:bug) { create(:label, project: project, title: 'Bug') }
 
   before do
-    project.team << [user, :developer]
+    project.team << [developer, :developer]
   end
 
   describe '#execute' do
-    let(:service) { described_class.new(project, user) }
+    let(:service) { described_class.new(project, developer) }
     let(:merge_request) { create(:merge_request, source_project: project) }
 
     shared_examples 'reopen command' do
@@ -45,13 +45,13 @@ describe SlashCommands::InterpretService, services: true do
       it 'fetches assignee and populates assignee_id if content contains /assign' do
         _, updates = service.execute(content, issuable)
 
-        expect(updates).to eq(assignee_id: user.id)
+        expect(updates).to eq(assignee_id: developer.id)
       end
     end
 
     shared_examples 'unassign command' do
       it 'populates assignee_id: nil if content contains /unassign' do
-        issuable.update(assignee_id: user.id)
+        issuable.update(assignee_id: developer.id)
         _, updates = service.execute(content, issuable)
 
         expect(updates).to eq(assignee_id: nil)
@@ -124,7 +124,7 @@ describe SlashCommands::InterpretService, services: true do
 
     shared_examples 'done command' do
       it 'populates todo_event: "done" if content contains /done' do
-        TodoService.new.mark_todo(issuable, user)
+        TodoService.new.mark_todo(issuable, developer)
         _, updates = service.execute(content, issuable)
 
         expect(updates).to eq(todo_event: 'done')
@@ -141,7 +141,7 @@ describe SlashCommands::InterpretService, services: true do
 
     shared_examples 'unsubscribe command' do
       it 'populates subscription_event: "unsubscribe" if content contains /unsubscribe' do
-        issuable.subscribe(user)
+        issuable.subscribe(developer)
         _, updates = service.execute(content, issuable)
 
         expect(updates).to eq(subscription_event: 'unsubscribe')
@@ -165,6 +165,23 @@ describe SlashCommands::InterpretService, services: true do
       end
     end
 
+    shared_examples 'wip command' do
+      it 'returns wip_event: "wip" if content contains /wip' do
+        _, updates = service.execute(content, issuable)
+
+        expect(updates).to eq(wip_event: 'wip')
+      end
+    end
+
+    shared_examples 'unwip command' do
+      it 'returns wip_event: "unwip" if content contains /wip' do
+        issuable.update(title: issuable.wip_title)
+        _, updates = service.execute(content, issuable)
+
+        expect(updates).to eq(wip_event: 'unwip')
+      end
+    end
+
     shared_examples 'empty command' do
       it 'populates {} if content contains an unsupported command' do
         _, updates = service.execute(content, issuable)
@@ -209,12 +226,12 @@ describe SlashCommands::InterpretService, services: true do
     end
 
     it_behaves_like 'assign command' do
-      let(:content) { "/assign @#{user.username}" }
+      let(:content) { "/assign @#{developer.username}" }
       let(:issuable) { issue }
     end
 
     it_behaves_like 'assign command' do
-      let(:content) { "/assign @#{user.username}" }
+      let(:content) { "/assign @#{developer.username}" }
       let(:issuable) { merge_request }
     end
 
@@ -376,9 +393,70 @@ describe SlashCommands::InterpretService, services: true do
       let(:issuable) { issue }
     end
 
+    it_behaves_like 'wip command' do
+      let(:content) { '/wip' }
+      let(:issuable) { merge_request }
+    end
+
+    it_behaves_like 'unwip command' do
+      let(:content) { '/wip' }
+      let(:issuable) { merge_request }
+    end
+
     it_behaves_like 'empty command' do
       let(:content) { '/remove_due_date' }
       let(:issuable) { merge_request }
     end
+
+    context 'when current_user cannot :admin_issue' do
+      let(:visitor) { create(:user) }
+      let(:issue) { create(:issue, project: project, author: visitor) }
+      let(:service) { described_class.new(project, visitor) }
+
+      it_behaves_like 'empty command' do
+        let(:content) { "/assign @#{developer.username}" }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { '/unassign' }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { "/milestone %#{milestone.title}" }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { '/remove_milestone' }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { %(/label ~"#{inprogress.title}" ~#{bug.title} ~unknown) }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { %(/unlabel ~"#{inprogress.title}") }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { %(/relabel ~"#{inprogress.title}") }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { '/due tomorrow' }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'empty command' do
+        let(:content) { '/remove_due_date' }
+        let(:issuable) { issue }
+      end
+    end
   end
 end
diff --git a/spec/services/system_note_service_spec.rb b/spec/services/system_note_service_spec.rb
index 3d854a959f3..b16840a1238 100644
--- a/spec/services/system_note_service_spec.rb
+++ b/spec/services/system_note_service_spec.rb
@@ -40,6 +40,12 @@ describe SystemNoteService, services: true do
     describe 'note body' do
       let(:note_lines) { subject.note.split("\n").reject(&:blank?) }
 
+      describe 'comparison diff link line' do
+        it 'adds the comparison text' do
+          expect(note_lines[2]).to match "[Compare with previous version]"
+        end
+      end
+
       context 'without existing commits' do
         it 'adds a message header' do
           expect(note_lines[0]).to eq "Added #{new_commits.size} commits:"