Added Module#alias_attribute [Jamis/DHH]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4653 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 31 insertions, 0 deletions

diff --git a/activesupport/test/core_ext/module/attribute_aliasing_test.rb b/activesupport/test/core_ext/module/attribute_aliasing_test.rb
new file mode 100644
index 0000000000..66ddbfe62a
--- /dev/null
+++ b/activesupport/test/core_ext/module/attribute_aliasing_test.rb
@@ -0,0 +1,31 @@
+require File.dirname(__FILE__) + '/../../abstract_unit'
+
+module AttributeAliasing
+  class Content
+    attr_accessor :title
+  
+    def title?
+      !title.nil?
+    end
+  end
+
+  class Email < Content
+    alias_attribute :subject, :title
+  end
+end
+
+class AttributeAliasingTest < Test::Unit::TestCase
+  def test_attribute_alias
+    e = AttributeAliasing::Email.new
+
+    assert !e.subject?
+
+    e.title = "Upgrade computer"
+    assert_equal "Upgrade computer", e.subject
+    assert e.subject?
+
+    e.subject = "We got a long way to go"
+    assert_equal "We got a long way to go", e.title
+    assert e.title?
+  end
+end