Test #c_function

Author: drbrain

test/test_rdoc_any_method.rb

@@ -34,6 +34,12 @@ def test_arglists
     assert_equal call_seq, m.arglists
   end
 
+  def test_c_function
+    @c1_m.c_function = 'my_c1_m'
+
+    assert_equal 'my_c1_m', @c1_m.c_function
+  end
+
   def test_full_name
     assert_equal 'C1::m', @c1.method_list.first.full_name
   end