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37 * \brief Test gmxapi::Context
39 * Provides additional test coverage of template headers only used by client code.
44 #include <gtest/gtest.h>
46 #include "gromacs/utility/gmxmpi.h"
48 #include "gmxapi/context.h"
49 #include "gmxapi/mpi/gmxapi_mpi.h"
61 TEST(GmxApiMpiTest, AllContext)
63 // Default Implicit COMM_WORLD for MPI builds.
64 auto context = createContext();
68 TEST(GmxApiMpiTest, NullContext)
70 // Explicit COMM_NULL is not supported.
71 EXPECT_ANY_THROW(assignResource(MPI_COMM_NULL));
74 TEST(GmxApiMpiTest, MpiWorldContext)
76 // Note that this test is only compiled when GMX_MPI is enabled for the
77 // build tree, so we cannot unit test the behavior of non-MPI GROMACS
78 // provided with MPI-enabled Context. For that, we defer to the Python
80 // Note also that the code should look the same for tMPI or regular MPI.
82 // Explicit COMM_WORLD.
83 auto resources = assignResource(MPI_COMM_WORLD);
84 EXPECT_TRUE(resources->size() != 0);
86 // Store the rank for debugging convenience.
87 [[maybe_unused]] auto rank = resources->rank();
89 auto context = createContext(*resources);
92 TEST(GmxApiMpiTest, MpiSplitContext)
94 // Explicit sub-communicator.
95 MPI_Comm communicator = MPI_COMM_NULL;
97 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
98 // Run each rank as a separate ensemble member.
99 MPI_Comm_split(MPI_COMM_WORLD, rank, rank, &communicator);
100 auto context = createContext(*assignResource(communicator));
104 } // end anonymous namespace
106 } // end namespace testing
108 } // end namespace gmxapi