1 files changed, 44 insertions, 0 deletions
diff --git a/test/ruby/test_module.rb b/test/ruby/test_module.rb
index 6176f484bc..1fe67df2be 100644
--- a/test/ruby/test_module.rb
+++ b/test/ruby/test_module.rb
@@ -277,6 +277,17 @@ class TestModule < Test::Unit::TestCase
     assert_equal([:MIXIN, :USER], User.constants.sort)
   end
 
+  def test_self_initialize_copy
+    bug9535 = '[ruby-dev:47989] [Bug #9535]'
+    m = Module.new do
+      def foo
+        :ok
+      end
+      initialize_copy(self)
+    end
+    assert_equal(:ok, Object.new.extend(m).foo, bug9535)
+  end
+
   def test_included_modules
     assert_equal([], Mixin.included_modules)
     assert_equal([Mixin], User.included_modules)
@@ -669,6 +680,19 @@ class TestModule < Test::Unit::TestCase
     m.instance_eval { remove_const(:Foo) }
   end
 
+  class Bug9413
+    class << self
+      Foo = :foo
+    end
+  end
+
+  def test_singleton_constants
+    bug9413 = '[ruby-core:59763] [Bug #9413]'
+    c = Bug9413.singleton_class
+    assert_include(c.constants(true), :Foo, bug9413)
+    assert_include(c.constants(false), :Foo, bug9413)
+  end
+
   def test_frozen_class
     m = Module.new
     m.freeze
@@ -1220,4 +1244,24 @@ class TestModule < Test::Unit::TestCase
     INPUT
     assert_in_out_err([], src, ["NameError"], [])
   end
+
+  def test_include_module_with_constants_invalidates_method_cache
+    assert_in_out_err([], <<-RUBY, %w(123 456), [])
+      A = 123
+
+      class Foo
+        def self.a
+          A
+        end
+      end
+
+      module M
+        A = 456
+      end
+
+      puts Foo.a
+      Foo.send(:include, M)
+      puts Foo.a
+    RUBY
+  end
 end