graph/test/min_degree_empty.cpp
CromwellEnage df1d52790c Fix minimum_degree_ordering
Handle degenerate case where input graph contains no edges.
2018-11-23 01:18:28 -05:00

52 lines
1.4 KiB
C++

//=======================================================================
// Copyright 2017 Felix Salfelder
//
// 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 <boost/graph/minimum_degree_ordering.hpp>
#include <boost/graph/adjacency_list.hpp>
#include <boost/property_map/property_map.hpp>
#include <boost/test/minimal.hpp>
#include <boost/typeof/typeof.hpp>
#include <vector>
#include <map>
typedef boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS> G;
int test_main(int argc, char** argv)
{
size_t n = 10;
G g(n);
std::vector<int> inverse_perm(n, 0);
std::vector<int> supernode_sizes(n, 1);
BOOST_AUTO(id, boost::get(boost::vertex_index, g));
std::vector<int> degree(n, 0);
std::map<int,int> io;
std::map<int,int> o;
boost::minimum_degree_ordering(
g
, boost::make_iterator_property_map(degree.begin(), id, degree[0])
, boost::make_assoc_property_map(io)
, boost::make_assoc_property_map(o)
, boost::make_iterator_property_map(
supernode_sizes.begin()
, id
, supernode_sizes[0]
)
, 0
, id
);
for (int k = 0; k < n; ++k)
{
BOOST_CHECK(o[io[k]] == k);
}
return 0;
}