Expand Padrino::Cache to support all features of underlying cache

padrino-cache/lib/padrino-cache/store/redis.rb

@@ -89,6 +89,20 @@ def delete(key)
         def flush
           @backend.flushdb
         end
+
+        ##
+        # Redis has a ton of powerful features (see: https://github.com/redis/redis-rb), which we
+        # can't use due to how strict the cache library is. This method catches all method calls and
+        # tries to pass them on the the redis gem.
+        #
+        # @api private
+        def method_missing(name, *args, &block)
+          if @backend.respond_to?(name)
+            @backend.send(name, *args, &block)
+          else
+            super
+          end
+        end
       end # Redis
     end # Store
   end # Cache

padrino-cache/test/test_stores.rb

@@ -96,6 +96,13 @@ def teardown
       Padrino.cache.flush
     end
 
+    eval <<-REDIS_TEST
+should 'add a value to a list' do
+  Padrino.cache.lpush(@test_key, "test")
+  assert_equal "test", Padrino.cache.lpop(@test_key)
+end
+    REDIS_TEST
+
     eval COMMON_TESTS
   end
 rescue LoadError