1 files changed, 39 insertions, 5 deletions
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index db3bb56f1f..6f1e518f45 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -18,7 +18,7 @@ require 'models/pet'
 require 'models/toy'
 require 'rexml/document'
 
-class PersistencesTest < ActiveRecord::TestCase
+class PersistenceTest < ActiveRecord::TestCase
   fixtures :topics, :companies, :developers, :projects, :computers, :accounts, :minimalistics, 'warehouse-things', :authors, :categorizations, :categories, :posts, :minivans, :pets, :toys
 
   # Oracle UPDATE does not support ORDER BY
@@ -139,6 +139,33 @@ class PersistencesTest < ActiveRecord::TestCase
     end
   end
 
+  def test_becomes
+    assert_kind_of Reply, topics(:first).becomes(Reply)
+    assert_equal "The First Topic", topics(:first).becomes(Reply).title
+  end
+
+  def test_becomes_includes_errors
+    company = Company.new(:name => nil)
+    assert !company.valid?
+    original_errors = company.errors
+    client = company.becomes(Client)
+    assert_equal original_errors, client.errors
+  end
+
+  def test_dupd_becomes_persists_changes_from_the_original
+    original = topics(:first)
+    copy = original.dup.becomes(Reply)
+    copy.save!
+    assert_equal "The First Topic", Topic.find(copy.id).title
+  end
+
+  def test_becomes_includes_changed_attributes
+    company = Company.new(name: "37signals")
+    client = company.becomes(Client)
+    assert_equal "37signals", client.name
+    assert_equal %w{name}, client.changed
+  end
+
   def test_delete_many
     original_count = Topic.count
     Topic.delete(deleting = [1, 2])
@@ -406,10 +433,6 @@ class PersistencesTest < ActiveRecord::TestCase
     assert !Topic.find(1).approved?
   end
 
-  def test_update_attribute_does_not_choke_on_nil
-    assert Topic.find(1).update(nil)
-  end
-
   def test_update_attribute_for_readonly_attribute
     minivan = Minivan.find('m1')
     assert_raises(ActiveRecord::ActiveRecordError) { minivan.update_attribute(:color, 'black') }
@@ -688,6 +711,17 @@ class PersistencesTest < ActiveRecord::TestCase
     assert_equal topic.title, Topic.find(1234).title
   end
 
+  def test_update_attributes_parameters
+    topic = Topic.find(1)
+    assert_nothing_raised do
+      topic.update_attributes({})
+    end
+
+    assert_raises(ArgumentError) do
+      topic.update_attributes(nil)
+    end
+  end
+
   def test_update!
     Reply.validates_presence_of(:title)
     reply = Reply.find(2)