Allows for other common redis options to be in cable.yml, by default

- Adds RedisAdapterTest::AlternateConfiguration to account
  for a relatively common alternative setup, as it’s used
  as the first example in the
  [Redis rubygem](https://github.com/redis/redis-rb#getting-started)

- Supplies original RedisAdapterTest with more complete
  redis:// url format by adding a ‘userinfo’ (blank user),
  so that it resembles the alternate configuration

- Supplies original EventedRedisAdapterTest with more complete
  redis:// url as well

- Adds before_script to start redis-server with password as a daemon
  and with explicit defaults copied from the default redis.conf
  (Instead of using Travis' default init/upstart scripts for `redis` service)

3 files changed, 13 insertions, 3 deletions

diff --git a/actioncable/lib/action_cable/subscription_adapter/redis.rb b/actioncable/lib/action_cable/subscription_adapter/redis.rb
index a31ed33bdb..225609c236 100644
--- a/actioncable/lib/action_cable/subscription_adapter/redis.rb
+++ b/actioncable/lib/action_cable/subscription_adapter/redis.rb
@@ -10,7 +10,9 @@ module ActionCable
 
       # Overwrite this factory method for redis connections if you want to use a different Redis library than Redis.
       # This is needed, for example, when using Makara proxies for distributed Redis.
-      cattr_accessor :redis_connector, default: ->(config) { ::Redis.new(url: config[:url]) }
+      cattr_accessor :redis_connector, default: ->(config) do
+        ::Redis.new(config.slice(:url, :host, :port, :db, :password))
+      end
 
       def initialize(*)
         super
diff --git a/actioncable/test/subscription_adapter/evented_redis_test.rb b/actioncable/test/subscription_adapter/evented_redis_test.rb
index 5453511549..1c99031ab0 100644
--- a/actioncable/test/subscription_adapter/evented_redis_test.rb
+++ b/actioncable/test/subscription_adapter/evented_redis_test.rb
@@ -54,6 +54,6 @@ class EventedRedisAdapterTest < ActionCable::TestCase
   end
 
   def cable_config
-    { adapter: "evented_redis", url: "redis://127.0.0.1:6379/12" }
+    { adapter: "evented_redis", url: "redis://:password@127.0.0.1:6379/12" }
   end
 end
diff --git a/actioncable/test/subscription_adapter/redis_test.rb b/actioncable/test/subscription_adapter/redis_test.rb
index 11120b3f85..60596dd205 100644
--- a/actioncable/test/subscription_adapter/redis_test.rb
+++ b/actioncable/test/subscription_adapter/redis_test.rb
@@ -7,7 +7,7 @@ class RedisAdapterTest < ActionCable::TestCase
   include ChannelPrefixTest
 
   def cable_config
-    { adapter: "redis", driver: "ruby", url: "redis://127.0.0.1:6379/12" }
+    { adapter: "redis", driver: "ruby", url: "redis://:password@127.0.0.1:6379/12" }
   end
 end
 
@@ -16,3 +16,11 @@ class RedisAdapterTest::Hiredis < RedisAdapterTest
     super.merge(driver: "hiredis")
   end
 end
+
+class RedisAdapterTest::AlternateConfiguration < RedisAdapterTest
+  def cable_config
+    alt_cable_config = super.dup
+    alt_cable_config.delete(:url)
+    alt_cable_config.merge(host: "127.0.0.1", port: 6379, db: 12, password: "password")
+  end
+end