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Tempus_UnitTest_BDF2.cpp
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1//@HEADER
2// *****************************************************************************
3// Tempus: Time Integration and Sensitivity Analysis Package
4//
5// Copyright 2017 NTESS and the Tempus contributors.
6// SPDX-License-Identifier: BSD-3-Clause
7// *****************************************************************************
8//@HEADER
9
10#include "Tempus_UnitTest_Utils.hpp"
11
12#include "Tempus_StepperRKButcherTableau.hpp"
13
14#include "Tempus_StepperBDF2.hpp"
15#include "Tempus_StepperBDF2ModifierBase.hpp"
16#include "Tempus_StepperBDF2ObserverBase.hpp"
17#include "Tempus_StepperBDF2ModifierXBase.hpp"
18#include "Tempus_StepperBDF2ModifierDefault.hpp"
19
20namespace Tempus_Unit_Test {
21
22using Teuchos::ParameterList;
23using Teuchos::RCP;
24using Teuchos::rcp;
25using Teuchos::rcp_const_cast;
26using Teuchos::rcp_dynamic_cast;
27using Teuchos::sublist;
28
29// ************************************************************
30// ************************************************************
31TEUCHOS_UNIT_TEST(BDF2, Default_Construction)
32{
33 auto model = rcp(new Tempus_Test::SinCosModel<double>());
34
35 // Default construction.
36 auto stepper = rcp(new Tempus::StepperBDF2<double>());
37 stepper->setModel(model);
38 stepper->initialize();
39 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
40
41 // Default values for construction.
42 auto modifier = rcp(new Tempus::StepperBDF2ModifierDefault<double>());
43 auto solver = rcp(new Thyra::NOXNonlinearSolver());
44 solver->setParameterList(Tempus::defaultSolverParameters());
45
46 auto startUpStepper = rcp(new Tempus::StepperDIRK_1StageTheta<double>());
47 startUpStepper->setModel(
48 model); // Can use the same model since both steppers are implicit ODEs.
49 startUpStepper->initialize();
50
51 auto defaultStepper = rcp(new Tempus::StepperBDF2<double>());
52 bool useFSAL = defaultStepper->getUseFSAL();
53 std::string ICConsistency = defaultStepper->getICConsistency();
54 bool ICConsistencyCheck = defaultStepper->getICConsistencyCheck();
55 bool zeroInitialGuess = defaultStepper->getZeroInitialGuess();
56
57 // Test the set functions.
58 stepper->setAppAction(modifier);
59 stepper->initialize();
60 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
61 stepper->setSolver(solver);
62 stepper->initialize();
63 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
64 stepper->setStartUpStepper(startUpStepper);
65 stepper->initialize();
66 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
67 stepper->setUseFSAL(useFSAL);
68 stepper->initialize();
69 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
70 stepper->setICConsistency(ICConsistency);
71 stepper->initialize();
72 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
73 stepper->setICConsistencyCheck(ICConsistencyCheck);
74 stepper->initialize();
75 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
76 stepper->setZeroInitialGuess(zeroInitialGuess);
77 stepper->initialize();
78 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
79
80 stepper = rcp(new Tempus::StepperBDF2<double>(
81 model, solver, startUpStepper, useFSAL, ICConsistency, ICConsistencyCheck,
82 zeroInitialGuess, modifier));
83 TEUCHOS_TEST_FOR_EXCEPT(!stepper->isInitialized());
84 // Test stepper properties.
85 TEUCHOS_ASSERT(stepper->getOrder() == 2);
86}
87
88// ************************************************************
89// ************************************************************
90TEUCHOS_UNIT_TEST(BDF2, StepperFactory_Construction)
91{
92 auto model = rcp(new Tempus_Test::SinCosModel<double>());
93 testFactoryConstruction("BDF2", model);
94}
95
96// ************************************************************
97// ************************************************************
98TEUCHOS_UNIT_TEST(BDF2, ParameterList)
99{
100 // Read params from .xml file
101 RCP<ParameterList> pList =
102 Teuchos::getParametersFromXmlFile("Tempus_BDF2_SinCos.xml");
103
104 // Setup the SinCosModel
105 RCP<ParameterList> scm_pl = sublist(pList, "SinCosModel", true);
106 auto model = rcp(new Tempus_Test::SinCosModel<double>(scm_pl));
107
108 RCP<ParameterList> tempusPL = sublist(pList, "Tempus", true);
109
110 // Test constructor IntegratorBasic(tempusPL, model)
111 {
112 RCP<Tempus::IntegratorBasic<double> > integrator =
113 Tempus::createIntegratorBasic<double>(tempusPL, model);
114
115 RCP<ParameterList> stepperPL = sublist(tempusPL, "Default Stepper", true);
116 RCP<const ParameterList> defaultPL =
117 integrator->getStepper()->getValidParameters();
118 bool pass = haveSameValuesSorted(*stepperPL, *defaultPL, true);
119 if (!pass) {
120 out << std::endl;
121 out << "stepperPL -------------- \n"
122 << *stepperPL << std::endl;
123 out << "defaultPL -------------- \n"
124 << *defaultPL << std::endl;
125 }
126 TEST_ASSERT(pass)
127 }
128
129 // Test constructor IntegratorBasic(model, stepperType)
130 {
131 RCP<Tempus::IntegratorBasic<double> > integrator =
132 Tempus::createIntegratorBasic<double>(model, std::string("BDF2"));
133
134 RCP<ParameterList> stepperPL = sublist(tempusPL, "Default Stepper", true);
135 RCP<const ParameterList> defaultPL =
136 integrator->getStepper()->getValidParameters();
137
138 bool pass = haveSameValuesSorted(*stepperPL, *defaultPL, true);
139 if (!pass) {
140 out << std::endl;
141 out << "stepperPL -------------- \n"
142 << *stepperPL << std::endl;
143 out << "defaultPL -------------- \n"
144 << *defaultPL << std::endl;
145 }
146 TEST_ASSERT(pass)
147 }
148}
149
150// ************************************************************
151// ************************************************************
152TEUCHOS_UNIT_TEST(BDF2, ConstructingFromDefaults)
153{
154 double dt = 0.1;
155 std::vector<std::string> options;
156 options.push_back("Default Parameters");
157 options.push_back("ICConsistency and Check");
158
159 for (const auto& option : options) {
160 // Read params from .xml file
161 RCP<ParameterList> pList =
162 Teuchos::getParametersFromXmlFile("Tempus_BDF2_SinCos.xml");
163 RCP<ParameterList> pl = sublist(pList, "Tempus", true);
164
165 // Setup the SinCosModel
166 RCP<ParameterList> scm_pl = sublist(pList, "SinCosModel", true);
167 // RCP<SinCosModel<double> > model = sineCosineModel(scm_pl);
168 auto model = rcp(new Tempus_Test::SinCosModel<double>(scm_pl));
169
170 // Setup Stepper for field solve ----------------------------
171 auto stepper = rcp(new Tempus::StepperBDF2<double>());
172 stepper->setModel(model);
173 if (option == "ICConsistency and Check") {
174 stepper->setICConsistency("Consistent");
175 stepper->setICConsistencyCheck(true);
176 }
177 stepper->initialize();
178
179 // Setup TimeStepControl ------------------------------------
180 auto timeStepControl = rcp(new Tempus::TimeStepControl<double>());
181 ParameterList tscPL =
182 pl->sublist("Default Integrator").sublist("Time Step Control");
183 timeStepControl->setInitIndex(tscPL.get<int>("Initial Time Index"));
184 timeStepControl->setInitTime(tscPL.get<double>("Initial Time"));
185 timeStepControl->setFinalTime(tscPL.get<double>("Final Time"));
186 timeStepControl->setInitTimeStep(dt);
187 timeStepControl->initialize();
188
189 // Setup initial condition SolutionState --------------------
190 auto inArgsIC = model->getNominalValues();
191 auto icSolution =
192 rcp_const_cast<Thyra::VectorBase<double> >(inArgsIC.get_x());
193 auto icState = Tempus::createSolutionStateX(icSolution);
194 icState->setTime(timeStepControl->getInitTime());
195 icState->setIndex(timeStepControl->getInitIndex());
196 icState->setTimeStep(0.0);
197 icState->setOrder(stepper->getOrder());
198 icState->setSolutionStatus(Tempus::Status::PASSED); // ICs are passing.
199
200 // Setup SolutionHistory ------------------------------------
201 auto solutionHistory = rcp(new Tempus::SolutionHistory<double>());
202 solutionHistory->setName("Forward States");
203 solutionHistory->setStorageType(Tempus::STORAGE_TYPE_STATIC);
204 solutionHistory->setStorageLimit(3);
205 solutionHistory->addState(icState);
206
207 // Ensure ICs are consistent and stepper memory is set (e.g., xDot is set).
208 stepper->setInitialConditions(solutionHistory);
209
210 // Setup Integrator -----------------------------------------
211 RCP<Tempus::IntegratorBasic<double> > integrator =
212 Tempus::createIntegratorBasic<double>();
213 integrator->setStepper(stepper);
214 integrator->setTimeStepControl(timeStepControl);
215 integrator->setSolutionHistory(solutionHistory);
216 // integrator->setObserver(...);
217 integrator->initialize();
218
219 // Integrate to timeMax
220 bool integratorStatus = integrator->advanceTime();
221 TEST_ASSERT(integratorStatus)
222
223 // Test if at 'Final Time'
224 double time = integrator->getTime();
225 double timeFinal = pl->sublist("Default Integrator")
226 .sublist("Time Step Control")
227 .get<double>("Final Time");
228 TEST_FLOATING_EQUALITY(time, timeFinal, 1.0e-14);
229
230 // Time-integrated solution and the exact solution
231 RCP<Thyra::VectorBase<double> > x = integrator->getX();
232 RCP<const Thyra::VectorBase<double> > x_exact =
233 model->getExactSolution(time).get_x();
234
235 // Calculate the error
236 RCP<Thyra::VectorBase<double> > xdiff = x->clone_v();
237 Thyra::V_StVpStV(xdiff.ptr(), 1.0, *x_exact, -1.0, *(x));
238
239 // Check the order and intercept
240 out << " Stepper = " << stepper->description() << "\n with "
241 << option << std::endl;
242 out << " =========================" << std::endl;
243 out << " Exact solution : " << get_ele(*(x_exact), 0) << " "
244 << get_ele(*(x_exact), 1) << std::endl;
245 out << " Computed solution: " << get_ele(*(x), 0) << " "
246 << get_ele(*(x), 1) << std::endl;
247 out << " Difference : " << get_ele(*(xdiff), 0) << " "
248 << get_ele(*(xdiff), 1) << std::endl;
249 out << " =========================" << std::endl;
250 TEST_FLOATING_EQUALITY(get_ele(*(x), 0), 0.839732, 1.0e-4);
251 TEST_FLOATING_EQUALITY(get_ele(*(x), 1), 0.542663, 1.0e-4);
252 }
253}
254
255// ************************************************************
256// ************************************************************
257class StepperBDF2ModifierTest
258 : virtual public Tempus::StepperBDF2ModifierBase<double> {
259 public:
261 StepperBDF2ModifierTest()
262 : testBEGIN_STEP(false),
263 testBEFORE_SOLVE(false),
264 testAFTER_SOLVE(false),
265 testEND_STEP(false),
266 testCurrentValue(-0.99),
267 testWorkingValue(-0.99),
268 testDt(.99),
269 testType("")
270 {
271 }
272
274 virtual ~StepperBDF2ModifierTest() {}
275
277 virtual void modify(
278 Teuchos::RCP<Tempus::SolutionHistory<double> > sh,
279 Teuchos::RCP<Tempus::StepperBDF2<double> > stepper,
280 const typename Tempus::StepperBDF2AppAction<double>::ACTION_LOCATION
281 actLoc)
282 {
283 switch (actLoc) {
284 case StepperBDF2AppAction<double>::BEGIN_STEP: {
285 testBEGIN_STEP = true;
286 auto x = sh->getWorkingState()->getX();
287 testCurrentValue = get_ele(*(x), 0);
288 break;
289 }
290 case StepperBDF2AppAction<double>::BEFORE_SOLVE: {
291 testBEFORE_SOLVE = true;
292 testType = "BDF2 - Modifier";
293 break;
294 }
295 case StepperBDF2AppAction<double>::AFTER_SOLVE: {
296 testAFTER_SOLVE = true;
297 testDt = sh->getCurrentState()->getTimeStep() / 10.0;
298 sh->getCurrentState()->setTimeStep(testDt);
299 break;
300 }
301 case StepperBDF2AppAction<double>::END_STEP: {
302 testEND_STEP = true;
303 auto x = sh->getWorkingState()->getX();
304 testWorkingValue = get_ele(*(x), 0);
305 break;
306 }
307 default:
308 TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error,
309 "Error - unknown action location.\n");
310 }
311 }
312 bool testBEGIN_STEP;
313 bool testBEFORE_SOLVE;
314 bool testAFTER_SOLVE;
315 bool testEND_STEP;
316 double testCurrentValue;
317 double testWorkingValue;
318 double testDt;
319 std::string testType;
320};
321
322TEUCHOS_UNIT_TEST(BDF2, AppAction_Modifier)
323{
324 auto model = rcp(new Tempus_Test::SinCosModel<double>());
325
326 // Setup Stepper for field solve ----------------------------
327 auto stepper = rcp(new Tempus::StepperBDF2<double>());
328 stepper->setModel(model);
329 auto modifier = rcp(new StepperBDF2ModifierTest());
330 stepper->setAppAction(modifier);
331 stepper->initialize();
332
333 // Setup initial condition SolutionState --------------------
334 auto inArgsIC = model->getNominalValues();
335 auto icSolution =
336 rcp_const_cast<Thyra::VectorBase<double> >(inArgsIC.get_x());
337 auto icState = Tempus::createSolutionStateX(icSolution);
338 icState->setTime(0.0);
339 icState->setIndex(0);
340 icState->setTimeStep(1.0);
341 icState->setOrder(stepper->getOrder());
342 icState->setSolutionStatus(Tempus::Status::PASSED); // ICs are passing.
343
344 // Setup TimeStepControl ------------------------------------
345 auto timeStepControl = rcp(new Tempus::TimeStepControl<double>());
346 timeStepControl->setInitIndex(0);
347 timeStepControl->setInitTime(0.0);
348 timeStepControl->setFinalTime(2.0);
349 timeStepControl->setInitTimeStep(1.0);
350 timeStepControl->initialize();
351
352 // Setup SolutionHistory ------------------------------------
353 auto solutionHistory = rcp(new Tempus::SolutionHistory<double>());
354 solutionHistory->setName("Forward States");
355 solutionHistory->setStorageType(Tempus::STORAGE_TYPE_STATIC);
356 solutionHistory->setStorageLimit(3);
357 solutionHistory->addState(icState);
358
359 // Take two time steps (the first step will not test BDF2's modifier)
360 stepper->setInitialConditions(solutionHistory);
361 solutionHistory->initWorkingState();
362 double dt = 1.0;
363 solutionHistory->getWorkingState()->setTimeStep(dt);
364 stepper->takeStep(solutionHistory);
365 solutionHistory->promoteWorkingState();
366 solutionHistory->initWorkingState();
367 stepper->takeStep(solutionHistory);
368
369 TEST_COMPARE(modifier->testBEGIN_STEP, ==, true);
370 TEST_COMPARE(modifier->testBEFORE_SOLVE, ==, true);
371 TEST_COMPARE(modifier->testAFTER_SOLVE, ==, true);
372 TEST_COMPARE(modifier->testEND_STEP, ==, true);
373
374 auto Dt = solutionHistory->getCurrentState()->getTimeStep();
375 TEST_FLOATING_EQUALITY(modifier->testDt, Dt, 1.0e-15);
376 auto x = solutionHistory->getCurrentState()->getX();
377 TEST_FLOATING_EQUALITY(modifier->testCurrentValue, get_ele(*(x), 0), 1.0e-15);
378 x = solutionHistory->getWorkingState()->getX();
379 TEST_FLOATING_EQUALITY(modifier->testWorkingValue, get_ele(*(x), 0), 1.0e-15);
380 TEST_COMPARE(modifier->testType, ==, "BDF2 - Modifier");
381}
382
383// ************************************************************
384// ************************************************************
385class StepperBDF2ObserverTest
386 : virtual public Tempus::StepperBDF2ObserverBase<double> {
387 public:
389 StepperBDF2ObserverTest()
390 : testBEGIN_STEP(false),
391 testBEFORE_SOLVE(false),
392 testAFTER_SOLVE(false),
393 testEND_STEP(false),
394 testCurrentValue(0.99),
395 testWorkingValue(0.99),
396 testDt(.99),
397 testType("")
398 {
399 }
400
402 virtual ~StepperBDF2ObserverTest() {}
403
405 virtual void modify(
406 Teuchos::RCP<Tempus::SolutionHistory<double> > sh,
407 Teuchos::RCP<Tempus::StepperBDF2<double> > stepper,
408 const typename Tempus::StepperBDF2AppAction<double>::ACTION_LOCATION
409 actLoc)
410 {
411 switch (actLoc) {
412 case StepperBDF2AppAction<double>::BEGIN_STEP: {
413 testBEGIN_STEP = true;
414 auto x = sh->getCurrentState()->getX();
415 testCurrentValue = get_ele(*(x), 0);
416 break;
417 }
418 case StepperBDF2AppAction<double>::BEFORE_SOLVE: {
419 testBEFORE_SOLVE = true;
420 testType = stepper->getStepperType();
421 break;
422 }
423 case StepperBDF2AppAction<double>::AFTER_SOLVE: {
424 testAFTER_SOLVE = true;
425 testDt = sh->getCurrentState()->getTimeStep();
426 break;
427 }
428 case StepperBDF2AppAction<double>::END_STEP: {
429 testEND_STEP = true;
430 auto x = sh->getWorkingState()->getX();
431 testWorkingValue = get_ele(*(x), 0);
432 break;
433 }
434
435 default:
436 TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error,
437 "Error - unknown action location.\n");
438 }
439 }
440 bool testBEGIN_STEP;
441 bool testBEFORE_SOLVE;
442 bool testAFTER_SOLVE;
443 bool testEND_STEP;
444 double testCurrentValue;
445 double testWorkingValue;
446 double testDt;
447 std::string testType;
448};
449
450// ************************************************************
451// ************************************************************
452TEUCHOS_UNIT_TEST(BDF2, AppAction_Observer)
453{
454 auto model = rcp(new Tempus_Test::SinCosModel<double>());
455
456 // Setup Stepper for field solve ----------------------------
457 auto stepper = rcp(new Tempus::StepperBDF2<double>());
458 stepper->setModel(model);
459 auto observer = rcp(new StepperBDF2ModifierTest());
460 stepper->setAppAction(observer);
461 stepper->initialize();
462
463 // Setup initial condition SolutionState --------------------
464 auto inArgsIC = model->getNominalValues();
465 auto icSolution =
466 rcp_const_cast<Thyra::VectorBase<double> >(inArgsIC.get_x());
467 auto icState = Tempus::createSolutionStateX(icSolution);
468 icState->setTime(0.0);
469 icState->setIndex(0);
470 icState->setTimeStep(1.0);
471 icState->setOrder(stepper->getOrder());
472 icState->setSolutionStatus(Tempus::Status::PASSED); // ICs are passing.
473
474 // Setup TimeStepControl ------------------------------------
475 auto timeStepControl = rcp(new Tempus::TimeStepControl<double>());
476 timeStepControl->setInitIndex(0);
477 timeStepControl->setInitTime(0.0);
478 timeStepControl->setFinalTime(2.0);
479 timeStepControl->setInitTimeStep(1.0);
480 timeStepControl->initialize();
481
482 // Setup SolutionHistory ------------------------------------
483 auto solutionHistory = rcp(new Tempus::SolutionHistory<double>());
484 solutionHistory->setName("Forward States");
485 solutionHistory->setStorageType(Tempus::STORAGE_TYPE_STATIC);
486 solutionHistory->setStorageLimit(3);
487 solutionHistory->addState(icState);
488
489 // Take two time steps (the first step will not test BDF2's modifier)
490 stepper->setInitialConditions(solutionHistory);
491 solutionHistory->initWorkingState();
492 double dt = 1.0;
493 solutionHistory->getWorkingState()->setTimeStep(dt);
494 stepper->takeStep(solutionHistory);
495 solutionHistory->promoteWorkingState();
496 solutionHistory->initWorkingState();
497 stepper->takeStep(solutionHistory);
498
499 TEST_COMPARE(observer->testBEGIN_STEP, ==, true);
500 TEST_COMPARE(observer->testBEFORE_SOLVE, ==, true);
501 TEST_COMPARE(observer->testAFTER_SOLVE, ==, true);
502 TEST_COMPARE(observer->testEND_STEP, ==, true);
503
504 auto Dt = solutionHistory->getCurrentState()->getTimeStep();
505 TEST_FLOATING_EQUALITY(observer->testDt, Dt, 1.0e-15);
506
507 auto x = solutionHistory->getCurrentState()->getX();
508 TEST_FLOATING_EQUALITY(observer->testCurrentValue, get_ele(*(x), 0), 1.0e-15);
509 x = solutionHistory->getWorkingState()->getX();
510 TEST_FLOATING_EQUALITY(observer->testWorkingValue, get_ele(*(x), 0), 1.0e-15);
511 TEST_COMPARE(observer->testType, ==, "BDF2 - Modifier");
512}
513
514// ************************************************************
515// ************************************************************
516class StepperBDF2ModifierXTest
517 : virtual public Tempus::StepperBDF2ModifierXBase<double> {
518 public:
520 StepperBDF2ModifierXTest()
521 : testX_BEGIN_STEP(false),
522 testX_BEFORE_SOLVE(false),
523 testX_AFTER_SOLVE(false),
524 testX_END_STEP(false),
525 testXbegin(-.99),
526 testXend(-.99),
527 testTime(0.0),
528 testDt(0.0)
529 {
530 }
531
533 virtual ~StepperBDF2ModifierXTest() {}
534
536 virtual void modify(
537 Teuchos::RCP<Thyra::VectorBase<double> > x, const double time,
538 const double dt,
539 const typename Tempus::StepperBDF2ModifierXBase<double>::MODIFIER_TYPE
540 modType)
541 {
542 switch (modType) {
543 case StepperBDF2ModifierXBase<double>::X_BEGIN_STEP: {
544 testX_BEGIN_STEP = true;
545 testXbegin = get_ele(*(x), 0);
546 break;
547 }
548 case StepperBDF2ModifierXBase<double>::X_BEFORE_SOLVE: {
549 testX_BEFORE_SOLVE = true;
550 testDt = dt;
551 break;
552 }
553 case StepperBDF2ModifierXBase<double>::X_AFTER_SOLVE: {
554 testX_AFTER_SOLVE = true;
555 testTime = time;
556 break;
557 }
558 case StepperBDF2ModifierXBase<double>::X_END_STEP: {
559 testX_END_STEP = true;
560 testXend = get_ele(*(x), 0);
561 break;
562 }
563 default:
564 TEUCHOS_TEST_FOR_EXCEPTION(true, std::logic_error,
565 "Error - unknown action location.\n");
566 }
567 }
568 bool testX_BEGIN_STEP;
569 bool testX_BEFORE_SOLVE;
570 bool testX_AFTER_SOLVE;
571 bool testX_END_STEP;
572 double testXbegin;
573 double testXend;
574 double testTime;
575 double testDt;
576};
577
578// ************************************************************
579// ************************************************************
580TEUCHOS_UNIT_TEST(BDF2, AppAction_ModifierX)
581{
582 auto model = rcp(new Tempus_Test::SinCosModel<double>());
583 // Setup Stepper for field solve ----------------------------
584 auto stepper = rcp(new Tempus::StepperBDF2<double>());
585 stepper->setModel(model);
586 auto modifierX = rcp(new StepperBDF2ModifierXTest());
587 stepper->setAppAction(modifierX);
588 stepper->initialize();
589
590 // Setup initial condition SolutionState --------------------
591 auto inArgsIC = model->getNominalValues();
592 auto icSolution =
593 rcp_const_cast<Thyra::VectorBase<double> >(inArgsIC.get_x());
594 auto icState = Tempus::createSolutionStateX(icSolution);
595 icState->setTime(0.0);
596 icState->setIndex(0);
597 icState->setTimeStep(1.0);
598 icState->setOrder(stepper->getOrder());
599 icState->setSolutionStatus(Tempus::Status::PASSED); // ICs are passing.
600
601 // Setup TimeStepControl ------------------------------------
602 auto timeStepControl = rcp(new Tempus::TimeStepControl<double>());
603 timeStepControl->setInitIndex(0);
604 timeStepControl->setInitTime(0.0);
605 timeStepControl->setFinalTime(2.0);
606 timeStepControl->setInitTimeStep(1.0);
607 timeStepControl->initialize();
608
609 // Setup SolutionHistory ------------------------------------
610 auto solutionHistory = rcp(new Tempus::SolutionHistory<double>());
611 solutionHistory->setName("Forward States");
612 solutionHistory->setStorageType(Tempus::STORAGE_TYPE_STATIC);
613 solutionHistory->setStorageLimit(3);
614 solutionHistory->addState(icState);
615
616 // Take two time steps (the first step will not test BDF2's modifier)
617 stepper->setInitialConditions(solutionHistory);
618 solutionHistory->initWorkingState();
619 double dt = 1.0;
620 solutionHistory->getWorkingState()->setTimeStep(dt);
621 stepper->takeStep(solutionHistory);
622 solutionHistory->promoteWorkingState();
623 solutionHistory->initWorkingState();
624 stepper->takeStep(solutionHistory);
625
626 TEST_COMPARE(modifierX->testX_BEGIN_STEP, ==, true);
627 TEST_COMPARE(modifierX->testX_BEFORE_SOLVE, ==, true);
628 TEST_COMPARE(modifierX->testX_AFTER_SOLVE, ==, true);
629 TEST_COMPARE(modifierX->testX_END_STEP, ==, true);
630
631 // Testing that values can be set through the Modifier.
632 auto x = solutionHistory->getCurrentState()->getX();
633 TEST_FLOATING_EQUALITY(modifierX->testXbegin, get_ele(*(x), 0), 1.0e-15);
634 auto Dt = solutionHistory->getWorkingState()->getTimeStep();
635 x = solutionHistory->getWorkingState()->getX();
636 TEST_FLOATING_EQUALITY(modifierX->testXend, get_ele(*(x), 0), 1.0e-15);
637 TEST_FLOATING_EQUALITY(modifierX->testDt, Dt, 1.0e-15);
638 auto time = solutionHistory->getWorkingState()->getTime();
639 TEST_FLOATING_EQUALITY(modifierX->testTime, time, 1.0e-15);
640}
641
642} // namespace Tempus_Unit_Test
Tempus_StepperBDF2ModifierBase.hpp
Tempus_StepperBDF2ModifierDefault.hpp
Tempus_StepperBDF2ModifierXBase.hpp
Tempus_StepperBDF2ObserverBase.hpp
Tempus_StepperRKButcherTableau.hpp
Tempus_UnitTest_Utils.hpp
Tempus::SolutionHistory
SolutionHistory is basically a container of SolutionStates. SolutionHistory maintains a collection of...
Definition Tempus_SolutionHistory_decl.hpp:119
Tempus::StepperBDF2AppAction::ACTION_LOCATION
ACTION_LOCATION
Indicates the location of application action (see algorithm).
Definition Tempus_StepperBDF2AppAction.hpp:38
Tempus::StepperBDF2ModifierXBase::MODIFIER_TYPE
MODIFIER_TYPE
Indicates the location of application action (see algorithm).
Definition Tempus_StepperBDF2ModifierXBase.hpp:98
Tempus::StepperBDF2ModifierXBase< double >::modify
virtual void modify(Teuchos::RCP< Thyra::VectorBase< double > >, const double, const double, const MODIFIER_TYPE modType)=0
Modify solution based on the MODIFIER_TYPE.
Tempus::StepperBDF2
BDF2 (Backward-Difference-Formula-2) time stepper.
Definition Tempus_StepperBDF2_decl.hpp:103
Tempus::StepperDIRK_1StageTheta
DIRK 1 Stage Theta.
Definition Tempus_StepperRKButcherTableau.hpp:2979
Tempus::TimeStepControl
TimeStepControl manages the time step size. There several mechanisms that effect the time step size a...
Definition Tempus_TimeStepControl_decl.hpp:52
Tempus_Test::SinCosModel
Sine-Cosine model problem from Rythmos. This is a canonical Sine-Cosine differential equation.
Definition SinCosModel_decl.hpp:110
Tempus_Unit_Test
Definition Tempus_UnitTest_BackwardEuler.cpp:22
Tempus_Unit_Test::TEUCHOS_UNIT_TEST
TEUCHOS_UNIT_TEST(BackwardEuler, Default_Construction)
Definition Tempus_UnitTest_BackwardEuler.cpp:33
Tempus_Unit_Test::testFactoryConstruction
void testFactoryConstruction(std::string stepperType, const Teuchos::RCP< const Thyra::ModelEvaluator< double > > &model)
Unit test utility for Stepper construction through StepperFactory.
Definition Tempus_UnitTest_Utils.hpp:42
Tempus::STORAGE_TYPE_STATIC
@ STORAGE_TYPE_STATIC
Keep a fix number of states.
Definition Tempus_SolutionHistory_decl.hpp:23
Tempus::createSolutionStateX
Teuchos::RCP< SolutionState< Scalar > > createSolutionStateX(const Teuchos::RCP< Thyra::VectorBase< Scalar > > &x, const Teuchos::RCP< Thyra::VectorBase< Scalar > > &xdot=Teuchos::null, const Teuchos::RCP< Thyra::VectorBase< Scalar > > &xdotdot=Teuchos::null)
Nonmember constructor from non-const solution vectors, x.
Definition Tempus_SolutionState_impl.hpp:349
Tempus::defaultSolverParameters
Teuchos::RCP< Teuchos::ParameterList > defaultSolverParameters()
Returns the default solver ParameterList for implicit Steppers.
Definition Tempus_Stepper_impl.hpp:413
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