Implement #inspect for file & null cache store

Author: the-spectator

activesupport/lib/active_support/cache/file_store.rb

@@ -85,6 +85,10 @@ def delete_matched(matcher, options = nil)
         end
       end
 
+      def inspect # :nodoc:
+        "#<#{self.class.name} cache_path=#{@cache_path}, options=#{@options.inspect}>"
+      end
+
       private
         def read_entry(key, **options)
           if payload = read_serialized_entry(key, **options)

activesupport/lib/active_support/cache/null_store.rb

@@ -32,6 +32,10 @@ def decrement(name, amount = 1, options = nil)
       def delete_matched(matcher, options = nil)
       end
 
+      def inspect # :nodoc:
+        "#<#{self.class.name} options=#{@options.inspect}>"
+      end
+
       private
         def read_entry(key, **s)
           deserialize_entry(read_serialized_entry(key))