117 lines
4.9 KiB
C++
117 lines
4.9 KiB
C++
#include <concepts>
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#include <type_traits>
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#include <catch2/catch_test_macros.hpp>
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import mean_field;
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import test_helpers;
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namespace {
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[[nodiscard]] mean_field::fem::FEM makeFiniteElements() {
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const mean_field::utils::Args arguments = test_utils::setup_args();
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return mean_field::fem::setup_fem(arguments.mesh_file, arguments, 0);
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}
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} // namespace
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TEST_CASE(
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"Simple User API Builds A Stellar Model With Its Default Preconditioner",
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"[user-api][simple]"
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) {
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using namespace mean_field;
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auto finiteElements = makeFiniteElements();
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REQUIRE(finiteElements.okay());
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auto model = model::StellarModel(
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eos::Polytrope({.n = 1.0, .K = 0.25}), surface::Isobaric({.Psurf = dimensions::PressureValue{0.0}}),
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integral::FixedTotalMass({.Mtotal = dimensions::MassValue{1.0}})
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);
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auto problem = equilibrium::discretize(model, finiteElements);
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auto preconditioner = preconditioning::makePreconditioner(problem);
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const auto &gravity = preconditioner.structureComponent().gravityComponent();
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STATIC_CHECK(preconditioning::PreconditionerComponent<decltype(preconditioner)>);
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STATIC_CHECK(
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std::same_as<
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typename std::remove_cvref_t<decltype(gravity)>::MassBackend, preconditioning::backend::MatrixFreeChebyshev>
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);
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CHECK(problem.StateSize() == problem.EquationSize());
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CHECK(decltype(preconditioner)::borderValueArity == 1);
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CHECK(gravity.massInverseBackend().order == 5);
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CHECK(gravity.potentialSchurBackend().application.cycles == 3);
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}
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TEST_CASE(
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"Intermediate User API Selects A Coupled Stellar Factorization",
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"[user-api][intermediate]"
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) {
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using namespace mean_field;
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auto finiteElements = makeFiniteElements();
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REQUIRE(finiteElements.okay());
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auto model = model::StellarModel(
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eos::Polytrope({.n = 3.0, .K = 0.25}), surface::Isobaric({.Psurf = dimensions::PressureValue{0.0}}),
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integral::FixedTotalMass({.Mtotal = dimensions::MassValue{1.0}}),
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constraint::FixedCentralDensity({.RhoC = dimensions::DensityValue{1.0}})
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);
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auto problem = equilibrium::discretize(model, finiteElements);
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auto material = preconditioning::materialSurfaceBlock(problem);
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auto gravity = preconditioning::GravityFieldBlock(
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preconditioning::backend::Diagonal{},
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preconditioning::backend::HypreBoomerAMG(preconditioning::backend::FixedCycles{.cycles = 2}),
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preconditioning::GravityApproximateLDU{}
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);
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auto structure = preconditioning::stellarStructureBlock(
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problem, material, gravity, preconditioning::ApproximateStellarBlockLDU{}
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);
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auto preconditioner = preconditioning::specificationBorderBlock(problem, structure);
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STATIC_CHECK(preconditioning::PreconditionerComponent<decltype(preconditioner)>);
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STATIC_CHECK(preconditioning::backend::ArnoldiAdmissible<typename decltype(preconditioner)::BackendType>);
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CHECK(decltype(preconditioner)::borderValueArity == 2);
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}
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TEST_CASE(
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"Advanced User API Composes Explicit Blocks Backends And Application Modes",
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"[user-api][advanced]"
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) {
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using namespace mean_field;
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auto finiteElements = makeFiniteElements();
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REQUIRE(finiteElements.okay());
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auto model = model::StellarModel(
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eos::Polytrope({.n = 3.0, .K = 0.25}), surface::Isobaric({.Psurf = dimensions::PressureValue{0.0}}),
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integral::FixedTotalMass({.Mtotal = dimensions::MassValue{1.0}}),
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constraint::FixedCentralDensity({.RhoC = dimensions::DensityValue{1.0}})
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);
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auto problem = equilibrium::discretize(model, finiteElements);
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auto material = preconditioning::materialSurfaceBlock(
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problem, preconditioning::backend::Diagonal{}, preconditioning::backend::Diagonal{},
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preconditioning::MaterialThenSurfaceTriangular{}, {.relativeFloor = 1.0e-10, .absoluteFloor = 1.0e-13}
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);
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auto gravity = preconditioning::GravityFieldBlock(
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preconditioning::backend::Diagonal{},
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preconditioning::backend::HypreBoomerAMG(
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preconditioning::backend::SolveToTolerance{.relativeTolerance = 1.0e-8, .maximumCycles = 20}
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),
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preconditioning::GravityUpperTriangular{}
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);
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auto structure = preconditioning::stellarStructureBlock(
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problem, material, gravity, preconditioning::MaterialThenGravityTriangular{}
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);
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auto preconditioner =
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preconditioning::specificationBorderBlock(problem, structure, preconditioning::backend::DenseDirect{});
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STATIC_CHECK(preconditioning::PreconditionerComponent<decltype(preconditioner)>);
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STATIC_CHECK_FALSE(preconditioning::backend::ArnoldiAdmissible<typename decltype(preconditioner)::BackendType>);
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CHECK(preconditioner.structureComponent().materialSurfaceComponent().diagonalOptions().relativeFloor == 1.0e-10);
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CHECK(
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preconditioner.structureComponent().gravityComponent().potentialSchurBackend().application.maximumCycles == 20
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);
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}
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