Add missing tests around rendering invalid merge requests (HTML+JSON)

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -80,6 +80,16 @@ describe Projects::MergeRequestsController do
                                                                 ))
         end
       end
+
+      context "that is invalid" do
+        let(:merge_request) { create(:invalid_merge_request, target_project: project, source_project: project) }
+
+        it "renders merge request page" do
+          go(format: :html)
+
+          expect(response).to be_success
+        end
+      end
     end
 
     describe 'as json' do
@@ -106,6 +116,16 @@ describe Projects::MergeRequestsController do
           expect(response).to match_response_schema('entities/merge_request_widget')
         end
       end
+
+      context "that is invalid" do
+        let(:merge_request) { create(:invalid_merge_request, target_project: project, source_project: project) }
+
+        it "renders merge request page" do
+          go(format: :json)
+
+          expect(response).to be_success
+        end
+      end
     end
 
     describe "as diff" do

spec/factories/merge_requests.rb

@@ -54,6 +54,11 @@ FactoryBot.define do
       state :opened
     end
 
+    trait :invalid do
+      source_branch "feature_one"
+      target_branch "feature_two"
+    end
+
     trait :locked do
       state :locked
     end
@@ -98,6 +103,7 @@ FactoryBot.define do
     factory :merged_merge_request, traits: [:merged]
     factory :closed_merge_request, traits: [:closed]
     factory :reopened_merge_request, traits: [:opened]
+    factory :invalid_merge_request, traits: [:invalid]
     factory :merge_request_with_diffs, traits: [:with_diffs]
     factory :merge_request_with_diff_notes do
       after(:create) do |mr|