1 files changed, 12 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/module_test.rb b/activesupport/test/core_ext/module_test.rb
index ecdea38d44..071eefcb29 100644
--- a/activesupport/test/core_ext/module_test.rb
+++ b/activesupport/test/core_ext/module_test.rb
@@ -36,6 +36,10 @@ Someone   = Struct.new(:name, :place) do
   delegate :upcase, :to => "place.city"
 end
 
+Invoice   = Struct.new(:client) do
+  delegate :street, :city, :name, :to => :client, :prefix => true
+end
+
 class Name
   delegate :upcase, :to => :@full_name
 
@@ -85,6 +89,14 @@ class ModuleTest < Test::Unit::TestCase
     assert_raises(ArgumentError) { eval($noplace) }
   end
 
+  def test_delegation_prefix
+    david = Someone.new("David", Somewhere.new("Paulina", "Chicago"))
+    invoice = Invoice.new(david)
+    assert_equal invoice.client_name, "David"
+    assert_equal invoice.client_street, "Paulina"
+    assert_equal invoice.client_city, "Chicago"
+  end
+
   def test_parent
     assert_equal Yz::Zy, Yz::Zy::Cd.parent
     assert_equal Yz, Yz::Zy.parent