Clean up "when redis had an outage" context in runner spec

spec/requests/api/runner_spec.rb

@@ -867,29 +867,51 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
           end
         end
 
-        context 'when redis had an outage' do
+        context 'when trace is patched' do
-          it "recovers" do
+          before do
-            # GitLab-Runner patchs
             patch_the_trace
+          end
+
+          it 'has valid trace' do
+            expect(response.status).to eq(202)
             expect(job.reload.trace.raw).to eq 'BUILD TRACE appended appended'
+          end
 
-            # GitLab-Rails encounters an outage on Redis
+          context 'when redis data are flushed' do
+            before do
               redis_shared_state_cleanup!
-            expect(job.reload.trace.raw).to eq ''
+            end
 
-            # GitLab-Runner patchs
+            it 'has empty trace' do
+              expect(job.reload.trace.raw).to eq ''
+            end
+
+            context 'when we perform partial patch' do
+              before do
                 patch_the_trace('hello', headers.merge({ 'Content-Range' => "28-32" }))
-            expect(response.status).to eq 202
+              end
+
+              it 'returns an error' do
+                expect(response.status).to eq(202)
                 expect(response.header).to have_key 'Range'
                 expect(response.header['Range']).to eq '0-0'
                 expect(job.reload.trace.raw).to eq ''
+              end
+            end
 
-            # GitLab-Runner re-patchs
+            context 'when we resend full trace' do
+              before do
                 patch_the_trace('BUILD TRACE appended appended hello')
+              end
+
+              it 'succeeds with updating trace' do
+                expect(response.status).to eq(202)
                 expect(job.reload.trace.raw).to eq 'BUILD TRACE appended appended hello'
               end
             end
           end
+        end
+      end
 
       context 'when Runner makes a force-patch' do
         before do