diff --git a/generator_iterator_test.cpp b/generator_iterator_test.cpp
new file mode 100644
index 0000000..1c7a110
--- /dev/null
+++ b/generator_iterator_test.cpp
@@ -0,0 +1,63 @@
+//
+// Copyright 2014 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/generator_iterator.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <algorithm>
+
+class X
+{
+private:
+
+    int v;
+
+public:
+
+    typedef int result_type;
+
+    X(): v( 0 )
+    {
+    }
+
+    int operator()()
+    {
+        return ++v;
+    }
+};
+
+template<class InputIterator, class Size, class OutputIterator> OutputIterator copy_n( InputIterator first, Size n, OutputIterator result )
+{
+    while( n-- > 0 )
+    {
+        *result++ = *first++;
+    }
+
+    return result;
+}
+
+void copy_test()
+{
+    X x;
+    boost::generator_iterator<X> in( &x );
+
+    int const N = 4;
+    int v[ N ] = { 0 };
+
+    ::copy_n( in, 4, v );
+
+    BOOST_TEST_EQ( v[0], 1 );
+    BOOST_TEST_EQ( v[1], 2 );
+    BOOST_TEST_EQ( v[2], 3 );
+    BOOST_TEST_EQ( v[3], 4 );
+}
+
+int main()
+{
+    copy_test();
+    return boost::report_errors();
+}