Updated Rakefile and test_helper to work with more adapters than just sqlite3.

Rakefile

@@ -0,0 +1,21 @@
+require 'rake/testtask'
+
+task :default => [:test]
+
+ADAPTERS = %w(mysql postgresql sqlite sqlite3 oracle)
+
+desc "Runs generic database tests."
+Rake::TestTask.new("test") { |t|
+  t.test_files = FileList["test/*_test.rb", "test/#{ENV['ARE_DB']}/**/*_test.rb"]
+}
+
+ADAPTERS.each do |adapter|
+  namespace :test do
+    desc "Runs unit tests for #{adapter} specific functionality"
+    task adapter do
+      ENV["ARE_DB"] = adapter
+      exec "rake test"
+      # exec replaces the current process, never gets here
+    end
+  end
+end

test/test_helper.rb

@@ -1,6 +1,5 @@
 ENV["RAILS_ENV"] = "test"
 require 'pathname'
-
 this_dir = Pathname.new File.dirname(__FILE__)
 $LOAD_PATH << this_dir.join("../lib")
 
@@ -57,22 +56,24 @@ end
 # load test helpers
 require "rails"
 class MyApplication < Rails::Application ; end
-adapter = "sqlite3"
+adapter = ENV["ARE_DB"] || "sqlite3"
 
 ActiveRecord::Base.logger = Logger.new("log/test.log")
+ActiveRecord::Base.logger.level = Logger::DEBUG
 ActiveRecord::Base.configurations["test"] = YAML.load(this_dir.join("database.yml").open)[adapter]
 ActiveRecord::Base.establish_connection "test"
 
+ActiveSupport::Notifications.subscribe(/active_record.sql/) do |event, _, _, _, hsh|
+  ActiveRecord::Base.logger.info hsh[:sql]
+end
+
 require "factory_girl"
 Dir[File.dirname(__FILE__) + "/support/**/*.rb"].each{ |file| require file }
 
 # Load base/generic schema
 require this_dir.join("schema/version")
 require this_dir.join("schema/generic_schema")
-
+adapter_schema = this_dir.join("schema/#{adapter}_schema.rb")
-# Load adapter specific schema if one exists
-adapter_schema = this_dir.join("schema/#{adapter}_schema")
 require adapter_schema if File.exists?(adapter_schema)
 
 Dir[File.dirname(__FILE__) + "/models/*.rb"].each{ |file| require file }
-