1 files changed, 21 insertions, 0 deletions
diff --git a/spec/ruby/core/refinement/extend_object_spec.rb b/spec/ruby/core/refinement/extend_object_spec.rb
new file mode 100644
index 0000000000..f6fe2a60ea
--- /dev/null
+++ b/spec/ruby/core/refinement/extend_object_spec.rb
@@ -0,0 +1,21 @@
+require_relative '../../spec_helper'
+
+describe "Refinement#extend_object" do
+  it "is not defined" do
+    Refinement.private_instance_methods(true).should_not.include?(:extend_object)
+  end
+
+  it "is not called by Object#extend" do
+    c = Class.new
+    Module.new do
+      refine c do
+        called = false
+        define_method(:extend_object) { called = true }
+        -> {
+          c.extend(self)
+        }.should.raise(TypeError)
+        called.should == false
+      end
+    end
+  end
+end