Fix ActiveSupport::TestCase tests for MySQL

CHANGELOG.md

@@ -13,6 +13,7 @@
     become the live instance.
   - If `destroy` actions are tracked for a versioned model, invoking `destroy` on the model will cause the corresponding version that
     gets generated to be assigned as the source version (`model_instance#version_association_name`, usually `model_instance#version`).
+  - Gem is now tested against `MySQL` and `PostgreSQL` in addition to `SQLite`.
 
 ## 3.0.1
 

paper_trail.gemspec

@@ -31,6 +31,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test', '>= 0.6'
   s.add_development_dependency 'rspec-rails', '~> 2.14'
   s.add_development_dependency 'generator_spec'
+  s.add_development_dependency 'database_cleaner', '~> 1.2'
 
   # JRuby support for the test ENV
   unless defined?(JRUBY_VERSION)

test/dummy/db/migrate/20110208155312_set_up_test_tables.rb

@@ -5,7 +5,7 @@ class SetUpTestTables < ActiveRecord::Migration
       t.text      :a_text
       t.integer   :an_integer
       t.float     :a_float
-      t.decimal   :a_decimal
+      t.decimal   :a_decimal, :precision => 6, :scale => 4
       t.datetime  :a_datetime
       t.time      :a_time
       t.date      :a_date

test/dummy/db/schema.rb

@@ -71,6 +71,7 @@ ActiveRecord::Schema.define(:version => 20110208155312) do
     t.integer  "article_id"
     t.string   "ip"
     t.string   "user_agent"
+    t.text     :object_changes
   end
 
   add_index "versions", ["item_type", "item_id"], :name => "index_versions_on_item_type_and_item_id"

test/functional/modular_sinatra_test.rb

@@ -29,7 +29,6 @@ class ModularSinatraTest < ActionDispatch::IntegrationTest
   end
 
   test 'baseline' do
-    assert_nil Widget.first
     assert_nil Widget.create.versions.first.whodunnit
   end
 
@@ -38,7 +37,7 @@ class ModularSinatraTest < ActionDispatch::IntegrationTest
     should "sets the `user_for_paper_trail` from the `current_user` method" do
       get '/test'
       assert_equal 'Hello', last_response.body
-      widget = Widget.first
+      widget = Widget.last
       assert_not_nil widget
       assert_equal 'foo', widget.name
       assert_equal 1, widget.versions.size

test/functional/sinatra_test.rb

@@ -30,7 +30,6 @@ class SinatraTest < ActionDispatch::IntegrationTest
   end
 
   test 'baseline' do
-    assert_nil Widget.first
     assert_nil Widget.create.versions.first.whodunnit
   end
 
@@ -39,7 +38,7 @@ class SinatraTest < ActionDispatch::IntegrationTest
     should "sets the `user_for_paper_trail` from the `current_user` method" do
       get '/test'
       assert_equal 'Hai', last_response.body
-      widget = Widget.first
+      widget = Widget.last
       assert_not_nil widget
       assert_equal 'bar', widget.name
       assert_equal 1, widget.versions.size

test/test_helper.rb

@@ -5,10 +5,15 @@ unless File.exists?(File.expand_path('../../test/dummy/config/database.yml', __F
   warn "WARNING: No database.yml detected for the dummy app, please run `rake prepare` first"
 end
 
+def using_mysql?
+  @using_mysql ||= ActiveRecord::Base.connection_config[:adapter].to_sym == :mysql2
+end
+
 require File.expand_path("../dummy/config/environment.rb",  __FILE__)
 require "rails/test_help"
 require 'shoulda'
 require 'ffaker'
+require 'database_cleaner' if using_mysql?
 
 Rails.backtrace_cleaner.remove_silencers!
 
@@ -18,9 +23,18 @@ ActiveRecord::Migrator.migrate File.expand_path("../dummy/db/migrate/", __FILE__
 # Load support files
 Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }
 
+# DatabaseCleaner is apparently necessary for doing proper transactions within MySQL (ugh)
+DatabaseCleaner.strategy = :truncation if using_mysql?
+
 # global setup block resetting Thread.current
 class ActiveSupport::TestCase
+  if using_mysql?
+    self.use_transactional_fixtures = false
+    setup { DatabaseCleaner.start }
+  end
+
   teardown do
+    DatabaseCleaner.clean if using_mysql?
     Thread.current[:paper_trail] = nil
   end
 end