Use fakeredis for testing

.travis.yml

@@ -9,7 +9,5 @@ gemfile:
 before_install:
   - gem install bundler
 
-services:
-   - redis-server
 cache: bundler
 sudo: false

spec/spec_helper.rb

@@ -14,10 +14,15 @@
 
 Dir['./spec/support/*.rb'].each { |f| require f }
 
+require "fakeredis"
+
+fakeredis = Redis.new
+
 RSpec.configure do |config|
   config.order = 'random'
   config.before(:each) do
     Split.configuration = Split::Configuration.new
+    Split.redis = fakeredis
     Split.redis.flushall
     @ab_user = mock_user
     params = nil

split.gemspec

@@ -31,4 +31,5 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rake',        '~> 11.1'
   s.add_development_dependency 'rspec',       '~> 3.4'
   s.add_development_dependency 'pry',         '~> 0.10'
+  s.add_development_dependency 'fakeredis',   '~> 0.5.0'
 end