Fix a broken Events API spec

Signed-off-by: Rémy Coutable <remy@rymai.me>

spec/requests/api/events_spec.rb

@@ -140,33 +140,28 @@ describe API::Events do
     end
 
     context 'when exists some events' do
+      let(:merge_request1) { create(:merge_request, :closed, author: user, assignee: user, source_project: private_project, title: 'Test') }
+      let(:merge_request2) { create(:merge_request, :closed, author: user, assignee: user, source_project: private_project, title: 'Test') }
+
       before do
-        create_event(note1)
-        create_event(note2)
         create_event(merge_request1)
       end
 
-      let(:note1) { create(:note_on_merge_request, project: private_project, author: user) }
-      let(:note2) { create(:note_on_issue, project: private_project, author: user) }
-      let(:merge_request1) { create(:merge_request, state: 'closed', author: user, assignee: user, source_project: private_project, title: 'Test') }
-      let(:merge_request2) { create(:merge_request, state: 'closed', author: user, assignee: user, source_project: private_project, title: 'Test') }
-
       it 'avoids N+1 queries' do
         control_count = ActiveRecord::QueryRecorder.new do
-          get api("/projects/#{private_project.id}/events", user)
+          get api("/projects/#{private_project.id}/events", user), target_type: :merge_request
         end.count
 
         create_event(merge_request2)
 
         expect do
-          get api("/projects/#{private_project.id}/events", user)
+          get api("/projects/#{private_project.id}/events", user), target_type: :merge_request
         end.not_to exceed_query_limit(control_count)
 
-        expect(response).to have_http_status(200)
+        expect(response).to have_gitlab_http_status(200)
         expect(response).to include_pagination_headers
-        expect(json_response).to be_an Array
-        expect(json_response[0]).to include('target_type' => 'MergeRequest', 'target_id' => merge_request2.id)
-        expect(json_response[1]).to include('target_type' => 'MergeRequest', 'target_id' => merge_request1.id)
+        expect(json_response.size).to eq(2)
+        expect(json_response.map { |r| r['target_id'] }).to match_array([merge_request1.id, merge_request2.id])
       end
 
       def create_event(target)