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37 * \brief Test gmxapi::Context
39 * Provides additional test coverage of template headers only used by client code.
42 #include "gromacs/utility/gmxmpi.h"
44 #include "gmxapi/context.h"
45 #include "gmxapi/mpi/gmxapi_mpi.h"
46 #include "testingconfiguration.h"
58 TEST_F(GmxApiTest, AllContext)
60 // Default Implicit COMM_WORLD for MPI builds.
61 EXPECT_NO_THROW(auto context = createContext());
65 TEST_F(GmxApiTest, NullContext)
67 // Explicit COMM_NULL is not supported.
68 EXPECT_ANY_THROW(assignResource(MPI_COMM_NULL));
71 TEST_F(GmxApiTest, MpiWorldContext)
73 // Note that this test is only compiled when GMX_MPI is enabled for the
74 // build tree, so we cannot unit test the behavior of non-MPI GROMACS
75 // provided with MPI-enabled Context. For that, we defer to the Python
77 // Note also that the code should look the same for tMPI or regular MPI.
79 // Explicit COMM_WORLD.
80 auto resources = assignResource(MPI_COMM_WORLD);
81 EXPECT_TRUE(resources->size() != 0);
83 // Store the rank for debugging convenience.
84 [[maybe_unused]] auto rank = resources->rank();
86 auto context = createContext(*resources);
89 TEST_F(GmxApiTest, MpiSplitContext)
91 // Explicit sub-communicator.
92 MPI_Comm communicator = MPI_COMM_NULL;
94 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
95 // Run each rank as a separate ensemble member.
96 MPI_Comm_split(MPI_COMM_WORLD, rank, rank, &communicator);
97 EXPECT_NO_THROW(auto context = createContext(*assignResource(communicator)));
101 } // end anonymous namespace
103 } // end namespace testing
105 } // end namespace gmxapi