more concise destroy test

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4646 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/test/base_test.rb

@@ -323,22 +323,14 @@ def test_preserving_time_objects
       assert_equal 9900, Topic.find(2).written_on.usec
     end
   end
-  
+
   def test_destroy
-    topic = Topic.new
-    topic.title = "Yet Another New Topic"
-    topic.written_on = "2003-12-12 23:23:00"
-    topic.save
-    topic.destroy
+    topic = Topic.find(1)
+    assert_equal topic, topic.destroy, 'topic.destroy did not return self'
+    assert topic.frozen?, 'topic not frozen after destroy'
     assert_raise(ActiveRecord::RecordNotFound) { Topic.find(topic.id) }
   end
-  
-  def test_destroy_returns_self
-    topic = Topic.new("title" => "Yet Another Title")
-    assert topic.save
-    assert_equal topic, topic.destroy, "destroy did not return destroyed object"
-  end
-  
+
   def test_record_not_found_exception
     assert_raises(ActiveRecord::RecordNotFound) { topicReloaded = Topic.find(99999) }
   end