Tidy up core files

test/beast/core/detail_tuple.cpp

@@ -0,0 +1,54 @@
+//
+// Copyright (c) 2018 Damian Jarek (damian dot jarek93 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/detail/tuple.hpp>
+
+#include <boost/beast/_experimental/unit_test/suite.hpp>
+
+namespace boost {
+namespace beast {
+namespace detail {
+
+class tuple_test : public beast::unit_test::suite
+{
+public:
+    void
+    run()
+    {
+        struct explicit_constructible
+        {
+            explicit_constructible(std::nullptr_t)
+                : i_(0)
+            {
+            }
+
+            explicit explicit_constructible(int i)
+                : i_(i)
+            {
+            }
+
+            int i_;
+        };
+
+        tuple<explicit_constructible, int> t{nullptr, 42};
+        BEAST_EXPECT(detail::get<1>(t) == 42);
+        BEAST_EXPECT(detail::get<0>(t).i_ == 0);
+
+        t = tuple<explicit_constructible, int>{explicit_constructible(42), 43};
+        BEAST_EXPECT(detail::get<1>(t) == 43);
+        BEAST_EXPECT(detail::get<0>(t).i_ == 42);
+    }
+};
+
+BEAST_DEFINE_TESTSUITE(beast,core,tuple);
+
+} // detail
+} // beast
+} // boost