Redis Cannot Connect Error

1_explanation

# When I run the test when Redis is running, all tests pass
# When I run the test with Redis purposefully off, I get the error at the end of the gist
#
# I've tried manually raising Redis::CannotConnectError instead of calling Redis.new
# and a new instance of SimpleStore is returned, and again all tests pass


# Gemfile
gem 'redis', '~> 3.0.0'





# Output when I try to run store_test.rb
# Command: ruby -v -Itest test/unit/crs/activity_feed/store_test.rb
1) Error:
  Redis::CannotConnectError: Error connecting to Redis on localhost:6379 (ECONNREFUSED)
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:262:in `rescue in establish_connection'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:257:in `establish_connection'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:63:in `connect'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:276:in `ensure_connected'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:167:in `block in process'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:242:in `logging'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:166:in `process'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis/client.rb:78:in `call'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis.rb:607:in `block in set'
    /Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis.rb:36:in `block in synchronize'


# Added `puts caller.join("\n") in redis.rb above line 36

/Users/kwiest2000/.rvm/gems/ruby-1.9.3-head@crs/gems/redis-3.0.0/lib/redis.rb:368:in `del'
/Users/kwiest2000/Projects/Camp-Registration-Systems/app/models/crs/activity_feed/store.rb:15:in `delete!'
test/unit/crs/activity_feed/store_test.rb:41:in `test_trim'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:949:in `run'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:787:in `block in _run_suite'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:780:in `map'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:780:in `_run_suite'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:770:in `block in _run_suites'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:770:in `map'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:770:in `_run_suites'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:746:in `_run_anything'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:909:in `run_tests'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:896:in `block in _run'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:895:in `each'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:895:in `_run'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:884:in `run'
/Users/kwiest2000/.rvm/rubies/ruby-1.9.3-head/lib/ruby/1.9.1/minitest/unit.rb:664:in `block in autorun'

2_test.rb

# store.rb
require 'redis'
require 'singleton'

module CRS
  class ActivityFeed

    class Store
      include Singleton

      def delete!(key)
        connection.del(key)
      end

      # Rest of instance methods...


      private

      def connection
        if ENV['RAILS_ENV'] == 'production'
          @host = ENV['REDIS_HOST']
          @port = 6379
        else
          @host = 'localhost'
          @port = 6379
        end

        @connection ||= Redis.new(host: @host, port: @port)
      rescue Redis::CannotConnectError
        SimpleStore.new
      end

    end


    class SimpleStore
      # simple store class
    end
  end
end