forest/tests/ex2.c

static char help[] = "Create a mesh, refine and coarsen simultaneously, and transfer a field\n\n";

#include <petscds.h>
#include <petscdmplex.h>
#include <petscdmforest.h>
#include <petscoptions.h>

static PetscErrorCode AddIdentityLabel(DM dm)
{
  PetscInt pStart, pEnd, p;

  PetscFunctionBegin;
  PetscCall(DMCreateLabel(dm, "identity"));
  PetscCall(DMPlexGetChart(dm, &pStart, &pEnd));
  for (p = pStart; p < pEnd; p++) PetscCall(DMSetLabelValue(dm, "identity", p, p));
  PetscFunctionReturn(PETSC_SUCCESS);
}

static PetscErrorCode CreateAdaptivityLabel(DM forest, DMLabel *adaptLabel)
{
  DMLabel  identLabel;
  PetscInt cStart, cEnd, c;

  PetscFunctionBegin;
  PetscCall(DMLabelCreate(PETSC_COMM_SELF, "adapt", adaptLabel));
  PetscCall(DMLabelSetDefaultValue(*adaptLabel, DM_ADAPT_COARSEN));
  PetscCall(DMGetLabel(forest, "identity", &identLabel));
  PetscCall(DMForestGetCellChart(forest, &cStart, &cEnd));
  for (c = cStart; c < cEnd; c++) {
    PetscInt basePoint;

    PetscCall(DMLabelGetValue(identLabel, c, &basePoint));
    if (!basePoint) PetscCall(DMLabelSetValue(*adaptLabel, c, DM_ADAPT_REFINE));
  }
  PetscFunctionReturn(PETSC_SUCCESS);
}

static PetscErrorCode LinearFunction(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, PetscScalar u[], PetscCtx ctx)
{
  PetscFunctionBeginUser;
  u[0] = (x[0] * 2.0 + 1.) + (x[1] * 20.0 + 10.) + ((dim == 3) ? (x[2] * 200.0 + 100.) : 0.);
  PetscFunctionReturn(PETSC_SUCCESS);
}

static PetscErrorCode MultiaffineFunction(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, PetscScalar u[], PetscCtx ctx)
{
  PetscFunctionBeginUser;
  u[0] = (x[0] * 1.0 + 2.0) * (x[1] * 3.0 - 4.0) * ((dim == 3) ? (x[2] * 5.0 + 6.0) : 1.);
  PetscFunctionReturn(PETSC_SUCCESS);
}

static PetscErrorCode CoordsFunction(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf, PetscScalar u[], PetscCtx ctx)
{
  PetscInt f;

  PetscFunctionBeginUser;
  for (f = 0; f < Nf; f++) u[f] = x[f];
  PetscFunctionReturn(PETSC_SUCCESS);
}

typedef struct _bc_func_ctx {
  PetscErrorCode (*func)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar[], void *);
  PetscInt dim;
  PetscInt Nf;
  void    *ctx;
} bc_func_ctx;

static PetscErrorCode bc_func_fv(PetscReal time, const PetscReal *c, const PetscReal *n, const PetscScalar *xI, PetscScalar *xG, PetscCtx ctx)
{
  bc_func_ctx *bcCtx;

  PetscFunctionBegin;
  bcCtx = (bc_func_ctx *)ctx;
  PetscCall(bcCtx->func(bcCtx->dim, time, c, bcCtx->Nf, xG, bcCtx->ctx));
  PetscFunctionReturn(PETSC_SUCCESS);
}

static PetscErrorCode IdentifyBadPoints(DM dm, Vec vec, PetscReal tol)
{
  DM           dmplex;
  PetscInt     p, pStart, pEnd, maxDof;
  Vec          vecLocal;
  DMLabel      depthLabel;
  PetscSection section;

  PetscFunctionBegin;
  PetscCall(DMCreateLocalVector(dm, &vecLocal));
  PetscCall(DMGlobalToLocalBegin(dm, vec, INSERT_VALUES, vecLocal));
  PetscCall(DMGlobalToLocalEnd(dm, vec, INSERT_VALUES, vecLocal));
  PetscCall(DMConvert(dm, DMPLEX, &dmplex));
  PetscCall(DMPlexGetChart(dmplex, &pStart, &pEnd));
  PetscCall(DMPlexGetDepthLabel(dmplex, &depthLabel));
  PetscCall(DMGetLocalSection(dmplex, &section));
  PetscCall(PetscSectionGetMaxDof(section, &maxDof));
  for (p = pStart; p < pEnd; p++) {
    PetscInt     s, c, cSize, parent, childID, numChildren;
    PetscInt     cl, closureSize, *closure = NULL;
    PetscScalar *values = NULL;
    PetscBool    bad    = PETSC_FALSE;

    PetscCall(VecGetValuesSection(vecLocal, section, p, &values));
    PetscCall(PetscSectionGetDof(section, p, &cSize));
    for (c = 0; c < cSize; c++) {
      PetscReal absDiff = PetscAbsScalar(values[c]);
      if (absDiff > tol) {
        bad = PETSC_TRUE;
        break;
      }
    }
    if (!bad) continue;
    PetscCall(PetscPrintf(PETSC_COMM_SELF, "Bad point %" PetscInt_FMT "\n", p));
    PetscCall(DMLabelGetValue(depthLabel, p, &s));
    PetscCall(PetscPrintf(PETSC_COMM_SELF, "  Depth %" PetscInt_FMT "\n", s));
    PetscCall(DMPlexGetTransitiveClosure(dmplex, p, PETSC_TRUE, &closureSize, &closure));
    for (cl = 0; cl < closureSize; cl++) {
      PetscInt cp = closure[2 * cl];
      PetscCall(DMPlexGetTreeParent(dmplex, cp, &parent, &childID));
      if (parent != cp) PetscCall(PetscPrintf(PETSC_COMM_SELF, "  Closure point %" PetscInt_FMT " (%" PetscInt_FMT ") child of %" PetscInt_FMT " (ID %" PetscInt_FMT ")\n", cl, cp, parent, childID));
      PetscCall(DMPlexGetTreeChildren(dmplex, cp, &numChildren, NULL));
      if (numChildren) PetscCall(PetscPrintf(PETSC_COMM_SELF, "  Closure point %" PetscInt_FMT " (%" PetscInt_FMT ") is parent\n", cl, cp));
    }
    PetscCall(DMPlexRestoreTransitiveClosure(dmplex, p, PETSC_TRUE, &closureSize, &closure));
    for (c = 0; c < cSize; c++) {
      PetscReal absDiff = PetscAbsScalar(values[c]);
      if (absDiff > tol) PetscCall(PetscPrintf(PETSC_COMM_SELF, "  Bad dof %" PetscInt_FMT "\n", c));
    }
  }
  PetscCall(DMDestroy(&dmplex));
  PetscCall(VecDestroy(&vecLocal));
  PetscFunctionReturn(PETSC_SUCCESS);
}

int main(int argc, char **argv)
{
  MPI_Comm comm;
  DM       base, preForest, postForest;
  PetscInt dim, Nf          = 1;
  PetscInt step, adaptSteps = 1;
  PetscInt preCount, postCount;
  Vec      preVec, postVecTransfer, postVecExact;
  PetscErrorCode (*funcs[1])(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar[], void *) = {MultiaffineFunction};
  void       *ctxs[1]                                                                                 = {NULL};
  PetscReal   diff, tol = PETSC_SMALL;
  PetscBool   linear                = PETSC_FALSE;
  PetscBool   coords                = PETSC_FALSE;
  PetscBool   useFV                 = PETSC_FALSE;
  PetscBool   conv                  = PETSC_FALSE;
  PetscBool   transfer_from_base[2] = {PETSC_TRUE, PETSC_FALSE};
  PetscBool   use_bcs               = PETSC_TRUE;
  bc_func_ctx bcCtx;
  DMLabel     adaptLabel;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, NULL, help));
  comm = PETSC_COMM_WORLD;
  PetscOptionsBegin(comm, "", "DMForestTransferVec() Test Options", "DMFOREST");
  PetscCall(PetscOptionsBool("-linear", "Transfer a simple linear function", "ex2.c", linear, &linear, NULL));
  PetscCall(PetscOptionsBool("-coords", "Transfer a simple coordinate function", "ex2.c", coords, &coords, NULL));
  PetscCall(PetscOptionsBool("-use_fv", "Use a finite volume approximation", "ex2.c", useFV, &useFV, NULL));
  PetscCall(PetscOptionsBool("-test_convert", "Test conversion to DMPLEX", NULL, conv, &conv, NULL));
  PetscCall(PetscOptionsBool("-transfer_from_base", "Transfer a vector from base DM to DMForest", "ex2.c", transfer_from_base[0], &transfer_from_base[0], NULL));
  transfer_from_base[1] = transfer_from_base[0];
  PetscCall(PetscOptionsBool("-transfer_from_base_steps", "Transfer a vector from base DM to the latest DMForest after the adaptivity steps", "ex2.c", transfer_from_base[1], &transfer_from_base[1], NULL));
  PetscCall(PetscOptionsBool("-use_bcs", "Use dirichlet boundary conditions", "ex2.c", use_bcs, &use_bcs, NULL));
  PetscCall(PetscOptionsBoundedInt("-adapt_steps", "Number of adaptivity steps", "ex2.c", adaptSteps, &adaptSteps, NULL, 0));
  PetscOptionsEnd();

  tol = PetscMax(1.e-10, tol); /* XXX fix for quadruple precision -> why do I need to do this? */

  /* the base mesh */
  PetscCall(DMCreate(comm, &base));
  PetscCall(DMSetType(base, DMPLEX));
  PetscCall(DMSetFromOptions(base));

  PetscCall(AddIdentityLabel(base));
  PetscCall(DMGetDimension(base, &dim));

  if (linear) funcs[0] = LinearFunction;
  if (coords) {
    funcs[0] = CoordsFunction;
    Nf       = dim;
  }

  bcCtx.func = funcs[0];
  bcCtx.dim  = dim;
  bcCtx.Nf   = Nf;
  bcCtx.ctx  = NULL;

  if (useFV) {
    PetscFV      fv;
    PetscLimiter limiter;
    DM           baseFV;

    PetscCall(DMPlexConstructGhostCells(base, NULL, NULL, &baseFV));
    PetscCall(DMViewFromOptions(baseFV, NULL, "-fv_dm_view"));
    PetscCall(DMDestroy(&base));
    base = baseFV;
    PetscCall(PetscFVCreate(PETSC_COMM_SELF, &fv));
    PetscCall(PetscFVSetSpatialDimension(fv, dim));
    PetscCall(PetscFVSetType(fv, PETSCFVLEASTSQUARES));
    PetscCall(PetscFVSetNumComponents(fv, Nf));
    PetscCall(PetscLimiterCreate(comm, &limiter));
    PetscCall(PetscLimiterSetType(limiter, PETSCLIMITERNONE));
    PetscCall(PetscFVSetLimiter(fv, limiter));
    PetscCall(PetscLimiterDestroy(&limiter));
    PetscCall(PetscFVSetFromOptions(fv));
    PetscCall(DMSetField(base, 0, NULL, (PetscObject)fv));
    PetscCall(PetscFVDestroy(&fv));
  } else {
    PetscFE fe;

    PetscCall(PetscFECreateDefault(comm, dim, Nf, PETSC_FALSE, NULL, PETSC_DEFAULT, &fe));
    PetscCall(DMSetField(base, 0, NULL, (PetscObject)fe));
    PetscCall(PetscFEDestroy(&fe));
  }
  PetscCall(DMCreateDS(base));

  if (use_bcs) {
    PetscInt ids[] = {1, 2, 3, 4, 5, 6};
    DMLabel  label;

    PetscCall(DMGetLabel(base, "marker", &label));
    PetscCall(DMAddBoundary(base, DM_BC_ESSENTIAL, "bc", label, 2 * dim, ids, 0, 0, NULL, useFV ? (PetscVoidFn *)bc_func_fv : (PetscVoidFn *)funcs[0], NULL, useFV ? (void *)&bcCtx : NULL, NULL));
  }
  PetscCall(DMViewFromOptions(base, NULL, "-dm_base_view"));

  /* the pre adaptivity forest */
  PetscCall(DMCreate(comm, &preForest));
  PetscCall(DMSetType(preForest, (dim == 2) ? DMP4EST : DMP8EST));
  PetscCall(DMCopyDisc(base, preForest));
  PetscCall(DMForestSetBaseDM(preForest, base));
  PetscCall(DMForestSetMinimumRefinement(preForest, 0));
  PetscCall(DMForestSetInitialRefinement(preForest, 1));
  PetscCall(DMSetFromOptions(preForest));
  PetscCall(DMSetUp(preForest));
  PetscCall(DMViewFromOptions(preForest, NULL, "-dm_pre_view"));

  /* the pre adaptivity field */
  PetscCall(DMCreateGlobalVector(preForest, &preVec));
  PetscCall(DMProjectFunction(preForest, 0., funcs, ctxs, INSERT_VALUES, preVec));
  PetscCall(VecViewFromOptions(preVec, NULL, "-vec_pre_view"));

  /* communicate between base and pre adaptivity forest */
  if (transfer_from_base[0]) {
    Vec baseVec, baseVecMapped;

    PetscCall(DMGetGlobalVector(base, &baseVec));
    PetscCall(DMProjectFunction(base, 0., funcs, ctxs, INSERT_VALUES, baseVec));
    PetscCall(PetscObjectSetName((PetscObject)baseVec, "Function Base"));
    PetscCall(VecViewFromOptions(baseVec, NULL, "-vec_base_view"));

    PetscCall(DMGetGlobalVector(preForest, &baseVecMapped));
    PetscCall(DMForestTransferVecFromBase(preForest, baseVec, baseVecMapped));
    PetscCall(VecViewFromOptions(baseVecMapped, NULL, "-vec_map_base_view"));

    /* compare */
    PetscCall(VecAXPY(baseVecMapped, -1., preVec));
    PetscCall(VecViewFromOptions(baseVecMapped, NULL, "-vec_map_diff_view"));
    PetscCall(VecNorm(baseVecMapped, NORM_2, &diff));

    /* output */
    if (diff < tol) {
      PetscCall(PetscPrintf(comm, "DMForestTransferVecFromBase() passes.\n"));
    } else {
      PetscCall(PetscPrintf(comm, "DMForestTransferVecFromBase() fails with error %g and tolerance %g\n", (double)diff, (double)tol));
    }

    PetscCall(DMRestoreGlobalVector(base, &baseVec));
    PetscCall(DMRestoreGlobalVector(preForest, &baseVecMapped));
  }

  for (step = 0; step < adaptSteps; ++step) {
    if (!transfer_from_base[1]) PetscCall(PetscObjectGetReference((PetscObject)preForest, &preCount));

    /* adapt */
    PetscCall(CreateAdaptivityLabel(preForest, &adaptLabel));
    PetscCall(DMForestTemplate(preForest, comm, &postForest));
    if (step) PetscCall(DMForestSetAdaptivityLabel(postForest, adaptLabel));
    PetscCall(DMLabelDestroy(&adaptLabel));
    PetscCall(DMSetUp(postForest));
    PetscCall(DMViewFromOptions(postForest, NULL, "-dm_post_view"));

    /* transfer */
    PetscCall(DMCreateGlobalVector(postForest, &postVecTransfer));
    PetscCall(DMForestTransferVec(preForest, preVec, postForest, postVecTransfer, PETSC_TRUE, 0.0));
    PetscCall(VecViewFromOptions(postVecTransfer, NULL, "-vec_post_transfer_view"));

    /* the exact post adaptivity field */
    PetscCall(DMCreateGlobalVector(postForest, &postVecExact));
    PetscCall(DMProjectFunction(postForest, 0., funcs, ctxs, INSERT_VALUES, postVecExact));
    PetscCall(VecViewFromOptions(postVecExact, NULL, "-vec_post_exact_view"));

    /* compare */
    PetscCall(VecAXPY(postVecExact, -1., postVecTransfer));
    PetscCall(VecViewFromOptions(postVecExact, NULL, "-vec_diff_view"));
    PetscCall(VecNorm(postVecExact, NORM_2, &diff));

    /* output */
    if (diff < tol) {
      PetscCall(PetscPrintf(comm, "DMForestTransferVec() passes.\n"));
    } else {
      PetscCall(PetscPrintf(comm, "DMForestTransferVec() fails with error %g and tolerance %g\n", (double)diff, (double)tol));
      PetscCall(IdentifyBadPoints(postForest, postVecExact, tol));
    }
    PetscCall(VecDestroy(&postVecExact));

    /* disconnect preForest from postForest if we don't test the transfer throughout the entire refinement process */
    if (!transfer_from_base[1]) {
      PetscCall(DMForestSetAdaptivityForest(postForest, NULL));
      PetscCall(PetscObjectGetReference((PetscObject)preForest, &postCount));
      PetscCheck(postCount == preCount, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Adaptation not memory neutral: reference count increase from %" PetscInt_FMT " to %" PetscInt_FMT, preCount, postCount);
    }

    if (conv) {
      DM dmConv;

      PetscCall(DMConvert(postForest, DMPLEX, &dmConv));
      PetscCall(DMViewFromOptions(dmConv, NULL, "-dm_conv_view"));
      PetscCall(DMPlexCheckCellShape(dmConv, PETSC_TRUE, PETSC_DETERMINE));
      PetscCall(DMDestroy(&dmConv));
    }

    PetscCall(VecDestroy(&preVec));
    PetscCall(DMDestroy(&preForest));

    preVec    = postVecTransfer;
    preForest = postForest;
  }

  if (transfer_from_base[1]) {
    Vec baseVec, baseVecMapped;

    /* communicate between base and last adapted forest */
    PetscCall(DMGetGlobalVector(base, &baseVec));
    PetscCall(DMProjectFunction(base, 0., funcs, ctxs, INSERT_VALUES, baseVec));
    PetscCall(PetscObjectSetName((PetscObject)baseVec, "Function Base"));
    PetscCall(VecViewFromOptions(baseVec, NULL, "-vec_base_view"));

    PetscCall(DMGetGlobalVector(preForest, &baseVecMapped));
    PetscCall(DMForestTransferVecFromBase(preForest, baseVec, baseVecMapped));
    PetscCall(VecViewFromOptions(baseVecMapped, NULL, "-vec_map_base_view"));

    /* compare */
    PetscCall(VecAXPY(baseVecMapped, -1., preVec));
    PetscCall(VecViewFromOptions(baseVecMapped, NULL, "-vec_map_diff_view"));
    PetscCall(VecNorm(baseVecMapped, NORM_2, &diff));

    /* output */
    if (diff < tol) {
      PetscCall(PetscPrintf(comm, "DMForestTransferVecFromBase() passes.\n"));
    } else {
      PetscCall(PetscPrintf(comm, "DMForestTransferVecFromBase() fails with error %g and tolerance %g\n", (double)diff, (double)tol));
    }

    PetscCall(DMRestoreGlobalVector(base, &baseVec));
    PetscCall(DMRestoreGlobalVector(preForest, &baseVecMapped));
  }

  /* cleanup */
  PetscCall(VecDestroy(&preVec));
  PetscCall(DMDestroy(&preForest));
  PetscCall(DMDestroy(&base));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST
  testset:
    args: -dm_plex_simplex 0 -dm_plex_box_faces 3,3,3 -petscspace_type tensor

    test:
      output_file: output/ex2_2d.out
      suffix: p4est_2d
      args: -petscspace_degree 2
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_2d.out
      suffix: p4est_2d_deg4
      args: -petscspace_degree 4
      requires: p4est !single

    test:
      output_file: output/ex2_2d.out
      suffix: p4est_2d_deg8
      args: -petscspace_degree 8
      requires: p4est !single

    test:
      output_file: output/ex2_steps2.out
      suffix: p4est_2d_deg2_steps2
      args: -petscspace_degree 2 -coords -adapt_steps 2
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_steps3.out
      suffix: p4est_2d_deg3_steps3
      args: -petscspace_degree 3 -coords -adapt_steps 3 -petscdualspace_lagrange_node_type equispaced -petscdualspace_lagrange_node_endpoints 1
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_steps3.out
      suffix: p4est_2d_deg3_steps3_L2_periodic
      args: -petscspace_degree 3 -petscdualspace_lagrange_continuity 0 -coords -adapt_steps 3 -dm_plex_box_bd periodic,periodic -use_bcs 0 -petscdualspace_lagrange_node_type equispaced
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_steps3.out
      suffix: p4est_3d_deg2_steps3_L2_periodic
      args: -dm_plex_dim 3 -petscspace_degree 2 -petscdualspace_lagrange_continuity 0 -coords -adapt_steps 3 -dm_plex_box_bd periodic,periodic,periodic -use_bcs 0
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_steps2.out
      suffix: p4est_3d_deg2_steps2
      args: -dm_plex_dim 3 -petscspace_degree 2 -coords -adapt_steps 2
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_steps3.out
      suffix: p4est_3d_deg3_steps3
      args: -dm_plex_dim 3 -petscspace_degree 3 -coords -adapt_steps 3 -petscdualspace_lagrange_node_type equispaced -petscdualspace_lagrange_node_endpoints 1
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_3d.out
      suffix: p4est_3d
      args: -dm_plex_dim 3 -petscspace_degree 1
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_3d.out
      suffix: p4est_3d_deg3
      args: -dm_plex_dim 3 -petscspace_degree 3
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_2d.out
      suffix: p4est_2d_deg2_coords
      args: -petscspace_degree 2 -coords
      nsize: 3
      requires: p4est !single

    test:
      output_file: output/ex2_3d.out
      suffix: p4est_3d_deg2_coords
      args: -dm_plex_dim 3 -petscspace_degree 2 -coords
      nsize: 3
      requires: p4est !single

    test:
      suffix: p4est_3d_nans
      args: -dm_plex_dim 3 -dm_forest_partition_overlap 1 -test_convert -petscspace_degree 1
      nsize: 2
      requires: p4est !single

    test:
      TODO: not broken, but the 3D case below is broken, so I do not trust this one
      output_file: output/ex2_steps2.out
      suffix: p4est_2d_tfb_distributed_nc
      args: -petscspace_degree 3 -dm_forest_maximum_refinement 2 -dm_p4est_refine_pattern hash -use_bcs 0 -coords -adapt_steps 2 -petscpartitioner_type shell -petscpartitioner_shell_random
      nsize: 3
      requires: p4est !single

    test:
      TODO: broken
      output_file: output/ex2_steps2.out
      suffix: p4est_3d_tfb_distributed_nc
      args: -dm_plex_dim 3 -petscspace_degree 2 -dm_forest_maximum_refinement 2 -dm_p4est_refine_pattern hash -use_bcs 0 -coords -adapt_steps 2 -petscpartitioner_type shell -petscpartitioner_shell_random
      nsize: 3
      requires: p4est !single

  testset:
    args: -petscspace_type tensor -dm_coord_space 0 -dm_plex_transform_type refine_tobox

    test:
      TODO: broken
      output_file: output/ex2_3d.out
      suffix: p4est_3d_transfer_fails
      args: -petscspace_degree 1 -dm_plex_filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/doublet-tet.msh -adapt_steps 1 -dm_forest_initial_refinement 1 -use_bcs 0 -dm_refine
      requires: p4est !single

    test:
      TODO: broken
      output_file: output/ex2_steps2_notfb.out
      suffix: p4est_3d_transfer_fails_2
      args: -petscspace_degree 1 -dm_plex_filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/doublet-tet.msh -adapt_steps 2 -dm_forest_initial_refinement 0 -transfer_from_base 0 -use_bcs 0 -dm_refine
      requires: p4est !single

    test:
      output_file: output/ex2_steps2.out
      suffix: p4est_3d_multi_transfer_s2t
      args: -petscspace_degree 3 -dm_plex_filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/doublet-tet.msh -adapt_steps 2 -dm_forest_initial_refinement 1 -petscdualspace_lagrange_continuity 0 -use_bcs 0 -dm_refine 1
      requires: p4est !single

    test:
      output_file: output/ex2_steps2.out
      suffix: p4est_3d_coords_transfer_s2t
      args: -petscspace_degree 3 -dm_plex_filename ${wPETSC_DIR}/share/petsc/datafiles/meshes/doublet-tet.msh -adapt_steps 2 -dm_forest_initial_refinement 1 -petscdualspace_lagrange_continuity 0 -coords -use_bcs 0 -dm_refine 1
      requires: p4est !single

  testset:
    args: -dm_plex_simplex 0 -dm_plex_box_faces 3,3,3

    test:
      output_file: output/ex2_2d_fv.out
      suffix: p4est_2d_fv
      args: -transfer_from_base 0 -use_fv -linear -dm_forest_partition_overlap 1
      nsize: 3
      requires: p4est !single

    test:
      TODO: broken (codimension adjacency)
      output_file: output/ex2_2d_fv.out
      suffix: p4est_2d_fv_adjcodim
      args: -transfer_from_base 0 -use_fv -linear -dm_forest_partition_overlap 1 -dm_forest_adjacency_codimension 1
      nsize: 2
      requires: p4est !single

    test:
      TODO: broken (dimension adjacency)
      output_file: output/ex2_2d_fv.out
      suffix: p4est_2d_fv_adjdim
      args: -transfer_from_base 0 -use_fv -linear -dm_forest_partition_overlap 1 -dm_forest_adjacency_dimension 1
      nsize: 2
      requires: p4est !single

    test:
      output_file: output/ex2_2d_fv.out
      suffix: p4est_2d_fv_zerocells
      args: -transfer_from_base 0 -use_fv -linear -dm_forest_partition_overlap 1
      nsize: 10
      requires: p4est !single

    test:
      output_file: output/ex2_3d_fv.out
      suffix: p4est_3d_fv
      args: -dm_plex_dim 3 -transfer_from_base 0 -use_fv -linear -dm_forest_partition_overlap 1
      nsize: 3
      requires: p4est !single

TEST*/