1 files changed, 138 insertions, 0 deletions
diff --git a/src/boost/libs/log/test/run/attr_function.cpp b/src/boost/libs/log/test/run/attr_function.cpp
new file mode 100644
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+++ b/src/boost/libs/log/test/run/attr_function.cpp
@@ -0,0 +1,138 @@
+/*
+ *          Copyright Andrey Semashev 2007 - 2015.
+ * 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)
+ */
+/*!
+ * \file   attr_function.cpp
+ * \author Andrey Semashev
+ * \date   25.01.2009
+ *
+ * \brief  This header contains tests for the function attribute.
+ */
+
+#define BOOST_TEST_MODULE attr_function
+
+#include <string>
+#include <boost/mpl/vector.hpp>
+#include <boost/utility/result_of.hpp>
+#include <boost/test/unit_test.hpp>
+#include <boost/log/attributes/function.hpp>
+#include <boost/log/utility/type_dispatch/static_type_dispatcher.hpp>
+
+namespace logging = boost::log;
+namespace attrs = logging::attributes;
+
+namespace {
+
+    // Type dispatcher for the supported types
+    struct my_dispatcher :
+        public logging::static_type_dispatcher<
+            boost::mpl::vector< int, std::string >
+        >
+    {
+        typedef logging::static_type_dispatcher<
+            boost::mpl::vector< int, std::string >
+        > base_type;
+
+        enum type_expected
+        {
+            none_expected,
+            int_expected,
+            string_expected
+        };
+
+        my_dispatcher() : base_type(*this), m_Expected(none_expected), m_Int(0) {}
+
+        void set_expected()
+        {
+            m_Expected = none_expected;
+        }
+        void set_expected(int value)
+        {
+            m_Expected = int_expected;
+            m_Int = value;
+        }
+        void set_expected(std::string const& value)
+        {
+            m_Expected = string_expected;
+            m_String = value;
+        }
+
+        // Implement visitation logic for all supported types
+        void operator() (int const& value) const
+        {
+            BOOST_CHECK_EQUAL(m_Expected, int_expected);
+            BOOST_CHECK_EQUAL(m_Int, value);
+        }
+        void operator() (std::string const& value) const
+        {
+            BOOST_CHECK_EQUAL(m_Expected, string_expected);
+            BOOST_CHECK_EQUAL(m_String, value);
+        }
+
+    private:
+        type_expected m_Expected;
+        int m_Int;
+        std::string m_String;
+    };
+
+    // A test function that returns an attribute value
+    int get_attr_value()
+    {
+        return 10;
+    }
+
+    // A test functional object that returns an attribute value
+    struct attr_value_generator
+    {
+        typedef std::string result_type;
+
+        explicit attr_value_generator(unsigned int& count) : m_CallsCount(count) {}
+        result_type operator() () const
+        {
+            ++m_CallsCount;
+            return "Hello, world!";
+        }
+
+    private:
+        unsigned int& m_CallsCount;
+    };
+
+} // namespace
+
+// The test verifies that the attribute calls the specified functor and returns the value returned by the functor
+BOOST_AUTO_TEST_CASE(calling)
+{
+    unsigned int call_count = 0;
+    my_dispatcher disp;
+
+    logging::attribute attr1 =
+#ifndef BOOST_NO_RESULT_OF
+        attrs::make_function(&get_attr_value);
+#else
+        attrs::make_function< int >(&get_attr_value);
+#endif
+
+    logging::attribute attr2 =
+#ifndef BOOST_NO_RESULT_OF
+        attrs::make_function(attr_value_generator(call_count));
+#else
+        attrs::make_function< std::string >(attr_value_generator(call_count));
+#endif
+
+    logging::attribute_value p1(attr1.get_value());
+    logging::attribute_value p2(attr2.get_value());
+    BOOST_CHECK_EQUAL(call_count, 1u);
+    logging::attribute_value p3(attr2.get_value());
+    BOOST_CHECK_EQUAL(call_count, 2u);
+
+    disp.set_expected(10);
+    BOOST_CHECK(p1.dispatch(disp));
+    BOOST_CHECK(p1.dispatch(disp)); // check that the contained value doesn't change over time or upon dispatching
+
+    disp.set_expected("Hello, world!");
+    BOOST_CHECK(p2.dispatch(disp));
+    BOOST_CHECK(p3.dispatch(disp));
+}