Refactor test build scripts

test/beast/core/async_result.cpp

@@ -0,0 +1,42 @@
+//
+// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+// Test that header file is self-contained.
+#include <boost/beast/core/async_result.hpp>
+
+#include <boost/beast/core/error.hpp>
+#include <boost/beast/core/type_traits.hpp>
+#include <cstdlib>
+
+namespace boost {
+namespace beast {
+namespace {
+
+struct handler
+{
+    void operator()(beast::error_code, std::size_t) const;
+};
+
+static_assert(detail::is_invocable<
+    typename async_result<handler, void(error_code, std::size_t)>::completion_handler_type,
+    void(error_code, std::size_t)>::value, "");
+
+static_assert(std::is_same<void,
+    typename async_result<handler, void(error_code, std::size_t)>::return_type>::value, "");
+
+static_assert(std::is_constructible<
+    async_result<handler,
+        void(error_code, std::size_t)>,
+    typename async_result<handler,
+        void(error_code, std::size_t)
+            >::completion_handler_type&>::value, "");
+
+} // (anon-ns)
+} // beast
+} // boost