bool xml_report(std::ostream &os_)
Displays the test results as an xml document. Returns
true when there was no failed test case.
Copyright Endre Tamas SAJO (baja at inf dot elte dot hu), Abel Sinkovics (abel at elte dot hu), 2010. 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