instance_methods should not special-case singleton classes, fixes #2993

Signed-off-by: URABE, Shyouhei <shyouhei@ruby-lang.org>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27085 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index f90543196b..453d850bb4 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -141,6 +141,11 @@ class TestModule < Test::Unit::TestCase
       :bClass3
     end
   end
+  
+  class CClass < BClass
+    def self.cClass
+    end
+  end
 
   MyClass = AClass.clone
   class MyClass
@@ -281,6 +286,9 @@ class TestModule < Test::Unit::TestCase
     assert_equal([:user, :mixin].sort, User.instance_methods(true).sort)
     assert_equal([:mixin], Mixin.instance_methods)
     assert_equal([:mixin], Mixin.instance_methods(true))
+    assert_equal([:cClass], (class << CClass; self; end).instance_methods(false))
+    assert_equal([], (class << BClass; self; end).instance_methods(false))
+    assert_equal([:cm2], (class << AClass; self; end).instance_methods(false))
     # Ruby 1.8 feature change:
     # #instance_methods includes protected methods.
     #assert_equal([:aClass], AClass.instance_methods(false))