Updates view specs for merge request show

- for prep in extending them in subsequent MR
- gain performance by using let_it_be

ee/spec/views/projects/merge_requests/show.html.haml_spec.rb

@@ -3,19 +3,10 @@
 require 'spec_helper'
 
 RSpec.describe 'projects/merge_requests/show.html.haml' do
-  before do
-    allow(view).to receive(:experiment_enabled?).and_return(false)
-  end
-
-  include_context 'closed merge request show action'
+  include_context 'merge request show action'
 
   context 'when merge request is created by a GitLab team member' do
-    let(:user) { create(:user) }
-
-    include_context 'gitlab team member'
-
     before do
-      allow(Gitlab).to receive(:com?).and_return(true)
       allow(user).to receive(:gitlab_employee?).and_return(true)
     end
 

spec/support/shared_contexts/issuable/merge_request_shared_context.rb

 # frozen_string_literal: true
 
-RSpec.shared_context 'open merge request show action' do
+RSpec.shared_context 'merge request show action' do
   include Spec::Support::Helpers::Features::MergeRequestHelpers
 
-  let(:user) { create(:user) }
-  let(:project) { create(:project, :public, :repository) }
-  let(:note) { create(:note_on_merge_request, project: project, noteable: open_merge_request) }
-
-  let(:open_merge_request) do
-    create(:merge_request, :opened, source_project: project, author: user)
-  end
-
-  before do
-    assign(:project, project)
-    assign(:merge_request, open_merge_request)
-    assign(:note, note)
-    assign(:noteable, open_merge_request)
-    assign(:notes, [])
-    assign(:pipelines, Ci::Pipeline.none)
-    assign(:issuable_sidebar, serialize_issuable_sidebar(user, project, open_merge_request))
-
-    preload_view_requirements(open_merge_request, note)
-
-    sign_in(user)
-  end
-end
-
-RSpec.shared_context 'closed merge request show action' do
-  include Devise::Test::ControllerHelpers
-  include ProjectForksHelper
-  include Spec::Support::Helpers::Features::MergeRequestHelpers
-
-  let(:user) { create(:user) }
-  let(:project) { create(:project, :public, :repository) }
-  let(:forked_project) { fork_project(project, user, repository: true) }
-  let(:unlink_project) { Projects::UnlinkForkService.new(forked_project, user) }
-  let(:note) { create(:note_on_merge_request, project: project, noteable: closed_merge_request) }
-
-  let(:closed_merge_request) do
-    create(:closed_merge_request,
-           source_project: forked_project,
-           target_project: project,
-           author: user)
-  end
+  let_it_be(:user) { create(:user) }
+  let_it_be(:project) { create(:project, :public, :repository) }
+  let_it_be(:merge_request) { create(:merge_request, :opened, source_project: project, author: user) }
+  let_it_be(:note) { create(:note_on_merge_request, project: project, noteable: merge_request) }
 
   before do
+    allow(view).to receive(:experiment_enabled?).and_return(false)
+    allow(view).to receive(:current_user).and_return(user)
     assign(:project, project)
-    assign(:merge_request, closed_merge_request)
-    assign(:commits_count, 0)
+    assign(:merge_request, merge_request)
     assign(:note, note)
-    assign(:noteable, closed_merge_request)
-    assign(:notes, [])
-    assign(:pipelines, Ci::Pipeline.none)
-    assign(:issuable_sidebar, serialize_issuable_sidebar(user, project, closed_merge_request))
-
-    preload_view_requirements(closed_merge_request, note)
+    assign(:noteable, merge_request)
+    assign(:pipelines, [])
+    assign(:issuable_sidebar, serialize_issuable_sidebar(user, project, merge_request))
 
-    allow(view).to receive_messages(current_user: user,
-                                    can?: true,
-                                    current_application_settings: Gitlab::CurrentSettings.current_application_settings)
+    preload_view_requirements(merge_request, note)
   end
 end

spec/views/projects/merge_requests/show.html.haml_spec.rb

@@ -2,16 +2,14 @@
 
 require 'spec_helper'
 
-RSpec.describe 'projects/merge_requests/show.html.haml' do
-  include Spec::Support::Helpers::Features::MergeRequestHelpers
+RSpec.describe 'projects/merge_requests/show.html.haml', :aggregate_failures do
+  include_context 'merge request show action'
 
   before do
-    allow(view).to receive(:experiment_enabled?).and_return(false)
+    merge_request.reload
   end
 
   context 'when the merge request is open' do
-    include_context 'open merge request show action'
-
     it 'shows the "Mark as draft" button' do
       render
 
@@ -22,20 +20,8 @@ RSpec.describe 'projects/merge_requests/show.html.haml' do
   end
 
   context 'when the merge request is closed' do
-    include_context 'closed merge request show action'
-
-    describe 'merge request assignee sidebar' do
-      context 'when assignee is allowed to merge' do
-        it 'does not show a warning icon' do
-          closed_merge_request.update!(assignee_id: user.id)
-          project.add_maintainer(user)
-          assign(:issuable_sidebar, serialize_issuable_sidebar(user, project, closed_merge_request))
-
-          render
-
-          expect(rendered).not_to have_css('.merge-icon')
-        end
-      end
+    before do
+      merge_request.close!
     end
 
     it 'shows the "Reopen" button' do
@@ -46,10 +32,9 @@ RSpec.describe 'projects/merge_requests/show.html.haml' do
       expect(rendered).to have_css('a', visible: false, text: 'Close')
     end
 
-    it 'does not show the "Reopen" button when the source project does not exist' do
-      unlink_project.execute
-      closed_merge_request.reload
-      preload_view_requirements(closed_merge_request, note)
+    context 'when source project does not exist' do
+      it 'does not show the "Reopen" button' do
+        allow(merge_request).to receive(:source_project).and_return(nil)
 
         render
 
@@ -57,4 +42,5 @@ RSpec.describe 'projects/merge_requests/show.html.haml' do
         expect(rendered).to have_css('a', visible: false, text: 'Close')
       end
     end
+  end
 end