Add throw_from_library_test

test/throw_from_library_test.cpp

@@ -0,0 +1,20 @@
+// Copyright 2018 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 "lib1_throw.hpp"
+#include "lib2_throw.hpp"
+#include "lib3_throw.hpp"
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    BOOST_TEST_THROWS( lib1::f(), lib1::exception );
+    BOOST_TEST_THROWS( lib2::f(), lib2::exception );
+    BOOST_TEST_THROWS( lib3::f(), lib3::exception );
+
+    return boost::report_errors();
+}