Add running_group_match factory

spec/factories/matches.rb

@@ -16,5 +16,14 @@ FactoryBot.define do
 
   factory :group_match, class: Match do
     group
+    factory :running_group_match do
+      transient do
+        match_scores_count { 2 }
+      end
+      after(:create) do |match, evaluator|
+        match.match_scores = create_list(:match_score, evaluator.match_scores_count)
+      end
+      state { 3 }
+    end
   end
 end