Improve merge when builds succeeds specs readability

spec/features/merge_requests/merge_when_build_succeeds_spec.rb

@@ -2,18 +2,26 @@ require 'spec_helper'
 
 feature 'Merge When Build Succeeds', feature: true, js: true do
   let(:user) { create(:user) }
-
   let(:project) { create(:project, :public) }
-  let(:merge_request) { create(:merge_request_with_diffs, source_project: project, author: user, title: "Bug NS-04") }
 
-  before do
-    project.team << [user, :master]
-    project.enable_ci
+  let(:merge_request) do
+    create(:merge_request_with_diffs, source_project: project,
+                                      author: user,
+                                      title: 'Bug NS-04')
+  end
+
+  let(:pipeline) do
+    create(:ci_pipeline, project: project,
+                         sha: merge_request.diff_head_sha,
+                         ref: merge_request.source_branch)
   end
 
-  context "Active build for Merge Request" do
-    let!(:pipeline) { create(:ci_pipeline, project: project, sha: merge_request.diff_head_sha, ref: merge_request.source_branch) }
-    let!(:ci_build) { create(:ci_build, pipeline: pipeline) }
+  before { project.team << [user, :master] }
+
+  context 'when there is active build for merge request' do
+    background do
+      create(:ci_build, pipeline: pipeline)
+    end
 
     before do
       login_as user
@@ -41,21 +49,25 @@ feature 'Merge When Build Succeeds', feature: true, js: true do
     end
   end
 
-  context 'When it is enabled' do
+  context 'when merge when build succeeds is enabled' do
     let(:merge_request) do
-      create(:merge_request_with_diffs, :simple,  source_project: project, author: user,
-                                                  merge_user: user, title: "MepMep", merge_when_build_succeeds: true)
+      create(:merge_request_with_diffs, :simple,  source_project: project,
+                                                  author: user,
+                                                  merge_user: user,
+                                                  title: 'MepMep',
+                                                  merge_when_build_succeeds: true)
     end
 
-    let!(:pipeline) { create(:ci_pipeline, project: project, sha: merge_request.diff_head_sha, ref: merge_request.source_branch) }
-    let!(:ci_build) { create(:ci_build, pipeline: pipeline) }
+    background do
+      create(:ci_build, pipeline: pipeline)
+    end
 
     before do
       login_as user
       visit_merge_request(merge_request)
     end
 
-    it 'cancels the automatic merge' do
+    it 'allows to cancel the automatic merge' do
       click_link "Cancel Automatic Merge"
 
       expect(page).to have_button "Merge When Build Succeeds"
@@ -72,8 +84,8 @@ feature 'Merge When Build Succeeds', feature: true, js: true do
     end
   end
 
-  context 'Build is not active' do
-    it "does not allow for enabling" do
+  context 'when build is not active' do
+    it "does not allow to enable merge when build succeeds" do
       visit_merge_request(merge_request)
       expect(page).not_to have_link "Merge When Build Succeeds"
     end