1 files changed, 59 insertions, 0 deletions
diff --git a/src/boost/libs/mpi/test/groups_test.cpp b/src/boost/libs/mpi/test/groups_test.cpp
new file mode 100644
index 000000000..ce81d182d
--- /dev/null
+++ b/src/boost/libs/mpi/test/groups_test.cpp
@@ -0,0 +1,59 @@
+// Copyright (C) 2013 Andreas Hehn <hehn@phys.ethz.ch>, ETH Zurich
+
+// Use, modification and distribution is subject to 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)
+
+// A test of communicators created from groups.
+
+#include <boost/mpi/environment.hpp>
+#include <boost/mpi/communicator.hpp>
+#include <boost/mpi/group.hpp>
+#include <vector>
+#include <algorithm>
+
+#define BOOST_TEST_MODULE mpi_group_test
+#include <boost/test/included/unit_test.hpp>
+
+namespace mpi = boost::mpi;
+
+template <typename T>
+struct iota
+{
+    iota() : state(0){};
+    T operator()()
+    {
+        return state++;
+    }
+    T state;
+};
+
+void group_test(const mpi::communicator& comm)
+{
+    std::vector<int> grp_a_ranks(comm.size() / 2);
+    std::generate(grp_a_ranks.begin(),grp_a_ranks.end(),iota<int>());
+
+    mpi::group grp_a = comm.group().include(grp_a_ranks.begin(),grp_a_ranks.end());
+    mpi::group grp_b = comm.group().exclude(grp_a_ranks.begin(),grp_a_ranks.end());
+
+    mpi::communicator part_a(comm,grp_a);
+    mpi::communicator part_b(comm,grp_b);
+
+    if(part_a)
+    {
+        std::cout << "comm rank: " << comm.rank() << " -> part_a rank:" << part_a.rank() << std::endl;
+        BOOST_CHECK(part_a.rank() == comm.rank());
+    }
+    if(part_b)
+    {
+        std::cout << "comm rank: " << comm.rank() << " -> part_b rank:" << part_b.rank() << std::endl;
+        BOOST_CHECK(part_b.rank() == comm.rank() - comm.size()/2);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(group)
+{
+    mpi::environment env;
+    mpi::communicator comm;
+    group_test(comm);
+}