### Description Recently Gitlab added a feature of rendering pipeline-mini-graph in real-time for merge request window. And those real-time processing will be adopted little by little into each page, such as pipeline index/show page. However, the test has not fully prepared yet, and the needs would be on demand in the future. We also need a dedicated mock class of pipeline processing. e.g. ```rb scenario '...' do runner = create_runner(pipeline) # create a runner which processes the pipeline expect(page).to have_selector(...) # Process the first stage runner.start # stage: 'build' - job1 running expect(page).to have_selector(...) # Finishes the first stage runner.proceed_with(:success) # stage: 'build' - job1 success -> stage: 'test' - job2 running expect(page).to have_selector(...) end ``` (NOTE: This class design may be changed) ### Proposal 1. Add feature tests with a dedicated mock class of pipeline processing 2. The MR should reproduce - https://gitlab.com/gitlab-org/gitlab-ce/issues/31127 - https://gitlab.com/gitlab-org/gitlab-ce/issues/31678 - https://gitlab.com/gitlab-org/gitlab-ce/issues/25226#note_28964273 3. Check the bug will be fixed by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11087 ### Links / references Real-time && feature-tests missing - [ ] pipeline#show - [ ] merge_requests#show Related: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10777 /cc @grzesiek @godfat