redis= wants a string, redis object, or redis::namespace object

lib/resque.rb

@@ -24,14 +24,15 @@ module Resque
   extend self
 
   # Accepts:
-  #   1. A 'hostname:port' string
-  #   2. A 'hostname:port:db' string (to select the Redis db)
-  #   3. A 'hostname:port/namespace' string (to set the Redis namespace)
-  #   4. A redis URL string 'redis://host:port'
+  #   1. A 'hostname:port' String
+  #   2. A 'hostname:port:db' String (to select the Redis db)
+  #   3. A 'hostname:port/namespace' String (to set the Redis namespace)
+  #   4. A Redis URL String 'redis://host:port'
   #   5. An instance of `Redis`, `Redis::Client`, `Redis::DistRedis`,
   #      or `Redis::Namespace`.
   def redis=(server)
-    if server.respond_to? :split
+    case server
+    when String
       if server =~ /redis\:\/\//
         redis = Redis.connect(:url => server, :thread_safe => true)
       else
@@ -43,8 +44,8 @@ def redis=(server)
       namespace ||= :resque
 
       @redis = Redis::Namespace.new(namespace, :redis => redis)
-    elsif server.respond_to? :namespace=
-        @redis = server
+    when Redis::Namespace
+      @redis = server
     else
       @redis = Redis::Namespace.new(:resque, :redis => server)
     end