Update testing directions.

Author: metaskills

RUNNING_UNIT_TESTS

@@ -1,13 +1,15 @@
 
 = TL;DR
 
+Default testing uses DBLIB with TinyTDS.
+
   * Setup two databases in SQL Server, [activerecord_unittest] and [activerecord_unittest2]
   * Create a [rails] user with an empty password and give it admin perms to both DBs.
   * $ git clone git://github.com/rails-sqlserver/activerecord-sqlserver-adapter.git
   * $ bundle install
-  * $ bundle exec rake test
+  * $ bundle exec rake test ACTIVERECORD_UNITTEST_HOST='my.db.net'
+
 
-  
 = Creating the test databases
 
 The default names for the test databases are "activerecord_unittest" and 
@@ -38,6 +40,25 @@ variable so bundler will use another local path instead.
   $ git clone git://github.com/rails-sqlserver/activerecord-sqlserver-adapter.git
 
 
+= Configure DB Connection
+
+Please consult the test/config.yml file which is used to parse the configuration options
+for the DB connections when running tests. This file has overrides for any connection mode 
+that you can set using simple environment variables. Assuming you are using FreeTDS 0.91 
+and above
+
+  $ export ACTIVERECORD_UNITTEST_HOST='my.db.net'   # Defaults to localhost
+  $ export ACTIVERECORD_UNITTEST_PORT='1533'        # Defaults to 1433
+
+If you have FreeTDS 0.82 installed and/or want to use a named dataserver in your freetds.conf file
+
+  $ export ACTIVERECORD_UNITTEST_DATASERVER='mydbname'
+
+These can be passed down to rake too.
+
+  $ bundle exec rake test ACTIVERECORD_UNITTEST_HOST='my.db.net'
+
+
 = Bundling
 
 Now with that out of the way you can run "bundle install" to hook everything up. 

test/config.yml

@@ -3,7 +3,8 @@ default_connection: dblib
 default_connection_info: &default_connection_info
   adapter: sqlserver
   mode: <%= ENV['ARCONN'] || 'dblib' %>
-  host: <%= ENV['ACTIVERECORD_UNITTEST_DATASERVER'] || 'localhost' %>
+  host: <%= ENV['ACTIVERECORD_UNITTEST_HOST'] || 'localhost' %>
+  port: <%= ENV['ACTIVERECORD_UNITTEST_PORT'] %>
   database: activerecord_unittest
   username: <%= ENV['ACTIVERECORD_UNITTEST_USER'] || 'rails' %>
   password: <%= ENV['ACTIVERECORD_UNITTEST_PASS'] || '' %>
@@ -15,10 +16,12 @@ connections:
     arunit:
       <<: *default_connection_info
       appname: SQLServerAdptrUnit
+      dataserver: <%= ENV['ACTIVERECORD_UNITTEST_DATASERVER'] %>
     arunit2:
       <<: *default_connection_info
       database: activerecord_unittest2
       appname: SQLServerAdptrUnit2
+      dataserver: <%= ENV['ACTIVERECORD_UNITTEST_DATASERVER'] %>
 
   odbc:
     arunit: