libs/histogram/test/axis_variant_serialization_test.cpp

   1 // Copyright (c) 2019 Hans Dembinski
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 // This test is inspired by the corresponding boost/beast test of detail_variant.
   8
   9 #include <boost/assert.hpp>
  10 #include <boost/core/lightweight_test.hpp>
  11 #include <boost/histogram/axis/integer.hpp>
  12 #include <boost/histogram/axis/ostream.hpp>
  13 #include <boost/histogram/axis/regular.hpp>
  14 #include <boost/histogram/axis/variant.hpp>
  15 #include <boost/histogram/serialization.hpp>
  16 #include "throw_exception.hpp"
  17 #include "utility_axis.hpp"
  18 #include "utility_serialization.hpp"
  19
  20 using namespace boost::histogram::axis;
  21
  22 int main(int argc, char** argv) {
  23   BOOST_ASSERT(argc == 2);
  24
  25   const auto filename = join(argv[1], "axis_variant_serialization_test.xml");
  26
  27   using R = regular<>;
  28   using I = integer<>;
  29
  30   variant<I, R> a(I(0, 3));
  31   variant<I, R> b(R(1, 0, 1));
  32   print_xml(filename, b);
  33   BOOST_TEST_NE(a, b);
  34   load_xml(filename, a);
  35   BOOST_TEST_EQ(a, b);
  36
  37   variant<I> c; // load incompatible version
  38   BOOST_TEST_THROWS(load_xml(filename, c), std::runtime_error);
  39
  40   return boost::report_errors();
  41 }