cleanup keys in the current namespace when run test everytime.

spec/spec_helper.rb

@@ -23,13 +23,19 @@ require "pry-rails"
 
 redis = Redis.new(:host => "127.0.0.1",:port => "6379")
 
-redis_with_ns = Redis::Namespace.new("weixin_#{Time.now.to_i}:weixin_authorize", :redis => redis)
+namespace = "weixin_test:weixin_authorize"
+
+# cleanup keys in the current namespace when restart server everytime.
+exist_keys = redis.keys("#{namespace}:*")
+exist_keys.each{|key|redis.del(key)}
+
+redis_with_ns = Redis::Namespace.new("#{namespace}", :redis => redis)
+
 WeixinAuthorize.configure do |config|
   config.redis = redis_with_ns
 end
 
 $client = WeixinAuthorize::Client.new(ENV["APPID"], ENV["APPSECRET"])
-
 RSpec.configure do |config|
 # The settings below are suggested to provide a good initial experience
 # with RSpec, but feel free to customize to your heart's content.