When RAILS_ENV=test, always set cache to null_store

Author: Drowze

lib/graphql/fragment_cache/railtie.rb

@@ -26,12 +26,15 @@ def store=(store)
 
       if ENV["RACK_ENV"] == "test" || ENV["RAILS_ENV"] == "test"
         initializer 'graphql-fragment_cache' do
-          if Rails.version.to_f >= 7.0 && ::ActiveSupport::Cache.format_version < 7.0
+          original_cache_version = if Rails.version.to_f >= 7.0 && ::ActiveSupport::Cache.format_version < 7.0
             cache_format_version = ::ActiveSupport::Cache.format_version
             ::ActiveSupport::Cache.format_version = 7.0
-            config.graphql_fragment_cache.store = :null_store
-            ::ActiveSupport::Cache.format_version = cache_format_version
+            cache_format_version
           end
+        
+          config.graphql_fragment_cache.store = :null_store
+        
+          ::ActiveSupport::Cache.format_version = original_cache_version if original_cache_version
         end
       end
     end