1 files changed, 48 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/cache/null_store.rb b/activesupport/lib/active_support/cache/null_store.rb
new file mode 100644
index 0000000000..8452a28fd8
--- /dev/null
+++ b/activesupport/lib/active_support/cache/null_store.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+module ActiveSupport
+  module Cache
+    # A cache store implementation which doesn't actually store anything. Useful in
+    # development and test environments where you don't want caching turned on but
+    # need to go through the caching interface.
+    #
+    # This cache does implement the local cache strategy, so values will actually
+    # be cached inside blocks that utilize this strategy. See
+    # ActiveSupport::Cache::Strategy::LocalCache for more details.
+    class NullStore < Store
+      prepend Strategy::LocalCache
+
+      # Advertise cache versioning support.
+      def self.supports_cache_versioning?
+        true
+      end
+
+      def clear(options = nil)
+      end
+
+      def cleanup(options = nil)
+      end
+
+      def increment(name, amount = 1, options = nil)
+      end
+
+      def decrement(name, amount = 1, options = nil)
+      end
+
+      def delete_matched(matcher, options = nil)
+      end
+
+      private
+        def read_entry(key, options)
+        end
+
+        def write_entry(key, entry, options)
+          true
+        end
+
+        def delete_entry(key, options)
+          false
+        end
+    end
+  end
+end