* test/ruby/test_method.rb: Add test for &-coersion of an

UnboundMethod.
* test/ruby/test_module.rb: Add test for define_method given an
  UnboundMethod.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49164 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_method.rb

@@ -652,6 +652,15 @@ class TestMethod < Test::Unit::TestCase
       EOC
   end
 
+  def test_unbound_method_proc_coerce
+    # '&' coercion of an UnboundMethod raises TypeError
+    assert_raise(TypeError) do
+      Class.new do
+        define_method('foo', &Object.instance_method(:to_s))
+      end
+    end
+  end
+
   def test___dir__
     assert_instance_of String, __dir__
     assert_equal(File.dirname(File.realpath(__FILE__)), __dir__)

test/ruby/test_module.rb

@@ -2011,6 +2011,25 @@ class TestModule < Test::Unit::TestCase
     RUBY
   end
 
+  def test_define_method_with_unbound_method
+    # Passing an UnboundMethod to define_method succeeds if it is from an ancestor
+    assert_nothing_raised do
+      cls = Class.new(String) do
+        define_method('foo', String.instance_method(:to_s))
+      end
+
+      obj = cls.new('bar')
+      assert_equal('bar', obj.foo)
+    end
+
+    # Passing an UnboundMethod to define_method fails if it is not from an ancestor
+    assert_raise(TypeError) do
+      Class.new do
+        define_method('foo', String.instance_method(:to_s))
+      end
+    end
+  end
+
   private
 
   def assert_top_method_is_private(method)