Add a tournament with stages to factory

spec/factories/tournaments.rb

@@ -5,5 +5,19 @@ FactoryBot.define do
     name { Faker::Dog.name }
     description { Faker::Lorem.sentence }
     user
+    transient do
+      teams_count { 16 }
+    end
+    after(:create) do |tournament, evaluator|
+      tournament.teams = create_list(:team, evaluator.teams_count, tournament: tournament)
+    end
+    factory :stage_tournament do
+      transient do
+        stage_count { 1 }
+      end
+      after(:create) do |tournament, evaluator|
+        tournament.stages = create_list(:stage, evaluator.stage_count)
+      end
+    end
   end
 end