delegate.rb: check if target is set

* lib/delegate.rb (SimpleDelegator#__getobj__): target object must be set.
* lib/delegate.rb (DelegateClass#__getobj__): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43759 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/test_delegate.rb b/test/test_delegate.rb
index 6448ef90dd..58fefea608 100644
--- a/test/test_delegate.rb
+++ b/test/test_delegate.rb
@@ -154,4 +154,18 @@ class TestDelegateClass < Test::Unit::TestCase
     end.new(Object.new)
     assert_equal("foo", d.send(:foo))
   end
+
+  def test_unset_simple_delegator
+    d = SimpleDelegator.allocate
+    assert_raise_with_message(ArgumentError, /not delegated/) {
+      d.__getobj__
+    }
+  end
+
+  def test_unset_delegate_class
+    d = IV.allocate
+    assert_raise_with_message(ArgumentError, /not delegated/) {
+      d.__getobj__
+    }
+  end
 end