Marks pending tasks for an user as done when he merge the MR

app/services/merge_requests/post_merge_service.rb

@@ -11,6 +11,7 @@ module MergeRequests
       create_merge_event(merge_request, current_user)
       create_note(merge_request)
       notification_service.merge_mr(merge_request, current_user)
+      task_service.merge_merge_request(merge_request, current_user)
       execute_hooks(merge_request, 'merge')
     end
 

app/services/task_service.rb

@@ -54,6 +54,14 @@ class TaskService
     reassigned_issuable(merge_request, current_user)
   end
 
+  # When merge a merge request we should:
+  #
+  #  * mark all pending tasks related to the target for the current user as done
+  #
+  def merge_merge_request(merge_request, current_user)
+    mark_as_done(merge_request, current_user)
+  end
+
   # When we mark a task as done we should:
   #
   #  * mark all pending tasks related to the target for the user as done

spec/services/task_service_spec.rb

@@ -167,6 +167,23 @@ describe TaskService, services: true do
         is_expected_to_not_create_task { service.reassigned_merge_request(mr_assigned, author) }
       end
     end
+
+    describe '#merge_merge_request' do
+      let!(:first_pending_task) do
+        create(:pending_assigned_task, user: john_doe, project: project, target: mr_assigned, author: author)
+      end
+
+      let!(:second_pending_task) do
+        create(:pending_assigned_task, user: john_doe, project: project, target: mr_assigned, author: author)
+      end
+
+      it 'marks related pending tasks to the target for the user as done' do
+        service.merge_merge_request(mr_assigned, john_doe)
+
+        expect(first_pending_task.reload).to be_done
+        expect(second_pending_task.reload).to be_done
+      end
+    end
   end
 
   def is_expected_to_create_pending_task(attributes = {})