Classes
struct	smash::Test::Position
	A FourVector that is marked as a position vector. More...

struct	smash::Test::Momentum
	A FourVector that is marked as a momentum vector. More...

Macros
#define	TEST(function_name)
	Defines a test function. More...

#define	TEST_CATCH(function_name, ExceptionType)
	Same as above, but expects the code to throw an exception of type `ExceptionType`. More...

#define	TEST_TYPES(T, test_name, typelist)
	Define a test function template, with type parameter T, which is specialized for all types in the `typelist`. More...

#define	VERIFY(condition)
	Verifies that `condition` is `true`. More...

#define	COMPARE(test_value, reference)
	Verifies that `test_value` is equal to `reference`. More...

#define	COMPARE_ABSOLUTE_ERROR(test_value, reference, allowed_difference)
	Verifies that the difference between `test_value` and `reference` is smaller than `allowed_difference`. More...

#define	COMPARE_RELATIVE_ERROR(test_value, reference, allowed_relative_difference)
	Verifies that the difference between `test_value` and `reference` is smaller than `allowed_relative_difference * reference`. More...

#define	FUZZY_COMPARE(test_value, reference)
	Verifies that `test_value` is equal to `reference` within a pre-defined distance in units of least precision (ulp). More...

#define	FAIL()
	Call this to fail a test. More...

Typedefs
using	smash::Test::ParticlesPtr = std::unique_ptr< Particles >
	A type alias for a unique_ptr of Particles. More...

Functions
void	smash::Test::create_actual_particletypes ()
	Creates the ParticleType list containing the actual particles that SMASH uses. More...

void	smash::Test::create_actual_decaymodes ()
	Creates the DecayModes list containing the actual decay modes that SMASH uses. More...

void	smash::Test::create_smashon_particletypes ()
	Creates a ParticleType list containing only the smashon test particle. More...

void	smash::Test::create_stable_smashon_particletypes ()
	Creates a ParticleType list containing only the smashon test particle with width 0 (stable). More...

ParticleData	smash::Test::smashon (int id=-1)
	Create a particle with 0 position and momentum vectors and optionally a given `id`. More...

ParticleData	smash::Test::smashon (const Position &position, int id=-1)
	Create a particle with 0 momentum vector, the given `position`, and optionally a given `id`. More...

ParticleData	smash::Test::smashon (const Momentum &momentum, int id=-1)
	Create a particle with 0 position vector, the given `momentum`, and optionally a given `id`. More...

ParticleData	smash::Test::smashon (const Position &position, const Momentum &momentum, int id=-1)
	Create a particle with the given `position` and `momentum` vectors, and optionally a given `id`. More...

ParticleData	smash::Test::smashon (const Momentum &momentum, const Position &position, int id=-1)
	Create a particle with the given `position` and `momentum` vectors, and optionally a given `id`. More...

ParticleData	smash::Test::smashon_random (int id=-1)
	Create a particle with random position and momentum vectors and optionally a given `id`. More...

std::unique_ptr< ExperimentBase >	smash::Test::experiment (Configuration c)
	Create an experiment given an input configuration. More...

template<typename G >
ParticleList	smash::Test::create_particle_list (std::size_t n, G &&generator)
	Generate a list of particles from the given generator function. More...

template<typename G >
ParticlesPtr	smash::Test::create_particles (int n, G &&generator)
	Creates a Particles object and fills it with `n` particles generated by the `generator` function. More...

ParticlesPtr	smash::Test::create_particles (const std::initializer_list< ParticleData > &init)
	Creates a Particles object and fills it with the particles passed as initializer_list to this function. More...

ReactionsBitSet	smash::Test::all_reactions_included ()
	returns BitSet of 2->2 reactions, where everything is on More...

MultiParticleReactionsBitSet	smash::Test::no_multiparticle_reactions ()
	returns BitSet for multi-particle reactions, where everything is off More...

ExperimentParameters	smash::Test::default_parameters (int testparticles=1, double dt=0.1, CollisionCriterion crit=CollisionCriterion::Geometric)
	Creates a standard ExperimentParameters object which works for almost all testing purposes. More...

ScatterActionsFinderParameters	smash::Test::default_finder_parameters (double elastic_parameter=10, NNbarTreatment nnbar_treatment=NNbarTreatment::NoAnnihilation, ReactionsBitSet included_2to2=all_reactions_included(), bool strings_switch=true, bool use_AQM=false, bool strings_with_probability=false, TotalCrossSectionStrategy xs_strategy=TotalCrossSectionStrategy::BottomUp)
	Creates a standard ScatterActionsFinderParameters object which works for almost all testing purposes. More...

EventInfo	smash::Test::default_event_info (double impact_parameter=0.0, bool empty_event=false)
	Creates default EventInfo object for testing purposes. More...

std::unique_ptr< StringProcess >	smash::Test::default_string_process_interface ()
	Creates a default StringProcessInterface object for testing. More...

Variables
static constexpr double	smash::Test::smashon_mass = 0.123
	The mass of the smashon particle. More...

static constexpr double	smash::Test::smashon_width = 1.2
	The decay width of the smashon particle. More...

static constexpr const char	smash::Test::smashon_pdg_string [] = "661"
	The PDG code of the smashon particle. More...

Macro Definition Documentation

◆ TEST

#define TEST ( function_name )

Defines a test function.

Consider this to expand to void function_name(). The function_name will also be the name that appears in the output after PASS/FAIL.

Definition at line 234 of file unittest.h.

◆ TEST_CATCH

#define TEST_CATCH	(	function_name,
		ExceptionType
	)

Same as above, but expects the code to throw an exception of type ExceptionType.

If the code does not throw (or throws a different exception), the test is considered failed.

Definition at line 243 of file unittest.h.

◆ TEST_TYPES

#define TEST_TYPES	(	T,
		test_name,
		typelist
	)

Define a test function template, with type parameter T, which is specialized for all types in the typelist.

Definition at line 249 of file unittest.h.

◆ VERIFY

#define VERIFY ( condition )

Verifies that condition is true.

Definition at line 254 of file unittest.h.

◆ COMPARE

#define COMPARE	(	test_value,
		reference
	)

Verifies that test_value is equal to reference.

Definition at line 259 of file unittest.h.

◆ COMPARE_ABSOLUTE_ERROR

#define COMPARE_ABSOLUTE_ERROR	(	test_value,
		reference,
		allowed_difference
	)

Verifies that the difference between test_value and reference is smaller than allowed_difference.

If the test fails the output will show the actual difference between test_value and reference. If this value is positive test_value is too large. If it is negative test_value is too small.

Definition at line 269 of file unittest.h.

◆ COMPARE_RELATIVE_ERROR

#define COMPARE_RELATIVE_ERROR	(	test_value,
		reference,
		allowed_relative_difference
	)

Verifies that the difference between test_value and reference is smaller than allowed_relative_difference * reference.

If the test fails the output will show the actual difference between test_value and reference. If this value is positive test_value is too large. If it is negative test_value is too small.

The following example tests that a is no more than 1% different from b:

COMPARE_ABSOLUTE_ERROR(a, b, 0.01);

COMPARE_ABSOLUTE_ERROR

#define COMPARE_ABSOLUTE_ERROR(test_value, reference, allowed_difference)

Verifies that the difference between test_value and reference is smaller than allowed_difference.

Definition: unittest.h:269

Note: This test macro still works even if reference is set to 0. It will then compare the difference against allowed_relative_difference * <smallest positive normalized value of reference type>.

Definition at line 288 of file unittest.h.

◆ FUZZY_COMPARE

#define FUZZY_COMPARE	(	test_value,
		reference
	)

Verifies that test_value is equal to reference within a pre-defined distance in units of least precision (ulp).

If the test fails it will print the distance in ulp between test_value and reference as well as the maximum allowed distance. Often this difference is not visible in the value because the conversion of a double/float to a string needs to round the value to a sensible length.

The allowed distance can be modified by calling:

vir::test::setFuzzyness<float>(4);

vir::test::setFuzzyness<double>(7);

ulp

Unit of least precision is a unit that is derived from the the least significant bit in the mantissa of a floating-point value. Consider a single-precision number (23 mantissa bits) with exponent \(e\). Then 1 ulp is \(2^{e-23}\). Thus, \(\log_2(u)\) signifies the the number incorrect mantissa bits (with \(u\) the distance in ulp).

If test_value and reference have a different exponent the meaning of ulp depends on the variable you look at. The FUZZY_COMPARE code always uses reference to determine the magnitude of 1 ulp.

Example: The value 1. is 0x3f800000 in binary. The value 1.00000011920928955078125 with binary representation 0x3f800001 therefore has a distance of 1 ulp. A positive distance means the test_value is larger than the reference. A negative distance means the test_value is smaller than the reference.

FUZZY_COMPARE(1.00000011920928955078125, 1.) will show a distance of 1
FUZZY_COMPARE(1., 1.00000011920928955078125) will show a distance of -1

The value 0.999999940395355224609375 with binary representation 0x3f7fffff has a smaller exponent than 1.:

FUZZY_COMPARE(0.999999940395355224609375, 1.) will show a distance of -0.5
FUZZY_COMPARE(1., 0.999999940395355224609375) will show a distance of 1

Comparing to 0

Distance to 0 is implemented as comparing to std::numeric_limits<T>::min() instead and adding 1 to the resulting distance.

Definition at line 337 of file unittest.h.

◆ FAIL

#define FAIL ( )

Call this to fail a test.

Definition at line 342 of file unittest.h.

Typedef Documentation

◆ ParticlesPtr

using smash::Test::ParticlesPtr = typedef std::unique_ptr<Particles>

A type alias for a unique_ptr of Particles.

Definition at line 180 of file setup.h.

Function Documentation

◆ create_actual_particletypes()

void smash::Test::create_actual_particletypes ( )

inline

Creates the ParticleType list containing the actual particles that SMASH uses.

Definition at line 36 of file setup.h.

                                           {
 #ifndef DOXYGEN
 #include <particles.txt.h>
 #endif
   ParticleType::create_type_list(data);
 }

◆ create_actual_decaymodes()

void smash::Test::create_actual_decaymodes ( )

inline

Creates the DecayModes list containing the actual decay modes that SMASH uses.

Definition at line 48 of file setup.h.

                                        {
 #ifndef DOXYGEN
 #include <decaymodes.txt.h>
 #endif
   DecayModes::load_decaymodes(data);
 }

◆ create_smashon_particletypes()

void smash::Test::create_smashon_particletypes ( )

inline

Creates a ParticleType list containing only the smashon test particle.

Definition at line 66 of file setup.h.

                                            {
   ParticleType::create_type_list(
       "# NAME MASS[GEV] WIDTH[GEV] PARITY PDG\n"
       "σ " +
       std::to_string(smashon_mass) + " " + std::to_string(smashon_width) +
       " + 661\n");
 }

◆ create_stable_smashon_particletypes()

void smash::Test::create_stable_smashon_particletypes ( )

inline

Creates a ParticleType list containing only the smashon test particle with width 0 (stable).

Definition at line 78 of file setup.h.

                                                   {
   ParticleType::create_type_list(
       "# NAME MASS[GEV] WIDTH[GEV] PARITY PDG\n"
       "σ " +
       std::to_string(smashon_mass) + " 0.0 + 661\n");
 }

◆ smashon() [1/5]

ParticleData smash::Test::smashon ( int id = -1 )

inline

Create a particle with 0 position and momentum vectors and optionally a given id.

Definition at line 98 of file setup.h.

                                          {
   ParticleData p{ParticleType::find(0x661), id};
   return p;
 }

◆ smashon() [2/5]

ParticleData smash::Test::smashon	(	const Position &	position,
		int	id = `-1`
	)

inline

Create a particle with 0 momentum vector, the given position, and optionally a given id.

Definition at line 106 of file setup.h.

                                                                    {
   ParticleData p{ParticleType::find(0x661), id};
   p.set_4position(position);
   return p;
 }

◆ smashon() [3/5]

ParticleData smash::Test::smashon	(	const Momentum &	momentum,
		int	id = `-1`
	)

inline

Create a particle with 0 position vector, the given momentum, and optionally a given id.

Definition at line 115 of file setup.h.

                                                                    {
   ParticleData p{ParticleType::find(0x661), id};
   p.set_4momentum(momentum);
   return p;
 }

◆ smashon() [4/5]

ParticleData smash::Test::smashon	(	const Position &	position,
		const Momentum &	momentum,
		int	id = `-1`
	)

inline

Create a particle with the given position and momentum vectors, and optionally a given id.

Definition at line 124 of file setup.h.

                                          {
   ParticleData p{ParticleType::find(0x661), id};
   p.set_4position(position);
   p.set_4momentum(momentum);
   return p;
 }

◆ smashon() [5/5]

ParticleData smash::Test::smashon	(	const Momentum &	momentum,
		const Position &	position,
		int	id = `-1`
	)

inline

Create a particle with the given position and momentum vectors, and optionally a given id.

Convenience overload of the above to allow arbitrary order of momentum and position.

Definition at line 138 of file setup.h.

                                          {
   ParticleData p{ParticleType::find(0x661), id};
   p.set_4position(position);
   p.set_4momentum(momentum);
   return p;
 }

◆ smashon_random()

ParticleData smash::Test::smashon_random ( int id = -1 )

inline

Create a particle with random position and momentum vectors and optionally a given id.

Definition at line 149 of file setup.h.

                                                 {
   auto random_value = random::make_uniform_distribution(-15.0, +15.0);
   ParticleData p{ParticleType::find(0x661), id};
   p.set_4position(
       {random_value(), random_value(), random_value(), random_value()});
   p.set_4momentum(smashon_mass,
                   {random_value(), random_value(), random_value()});
   return p;
 }

◆ experiment()

std::unique_ptr<ExperimentBase> smash::Test::experiment ( Configuration c )

inline

Create an experiment given an input configuration.

Definition at line 162 of file setup.h.

                                                                  {
   return ExperimentBase::create(c, ".");
 }

◆ create_particle_list()

template<typename G >

ParticleList smash::Test::create_particle_list	(	std::size_t	n,
		G &&	generator
	)

inline

Generate a list of particles from the given generator function.

Definition at line 170 of file setup.h.

                                                                      {
   ParticleList list;
   list.reserve(n);
   for (auto i = n; i; --i) {
     list.emplace_back(generator());
   }
   return list;
 }

◆ create_particles() [1/2]

template<typename G >

ParticlesPtr smash::Test::create_particles	(	int	n,
		G &&	generator
	)

inline

Creates a Particles object and fills it with n particles generated by the generator function.

Definition at line 187 of file setup.h.

                                                            {
   ParticlesPtr p = std::make_unique<Particles>();
   for (auto i = n; i; --i) {
     p->insert(generator());
   }
   return p;
 }

◆ create_particles() [2/2]

ParticlesPtr smash::Test::create_particles ( const std::initializer_list< ParticleData > & init )

inline

Creates a Particles object and fills it with the particles passed as initializer_list to this function.

Definition at line 199 of file setup.h.

                                                    {
   ParticlesPtr p = std::make_unique<Particles>();
   for (const auto &data : init) {
     p->insert(data);
   }
   return p;
 }

◆ all_reactions_included()

ReactionsBitSet smash::Test::all_reactions_included ( )

inline

returns BitSet of 2->2 reactions, where everything is on

Definition at line 209 of file setup.h.

                                                 {
   return ReactionsBitSet().set();
 }

◆ no_multiparticle_reactions()

MultiParticleReactionsBitSet smash::Test::no_multiparticle_reactions ( )

inline

returns BitSet for multi-particle reactions, where everything is off

Definition at line 214 of file setup.h.

                                                                  {
   return MultiParticleReactionsBitSet().reset();
 }

◆ default_parameters()

ExperimentParameters smash::Test::default_parameters	(	int	testparticles = `1`,
		double	dt = `0.1`,
		CollisionCriterion	crit = `CollisionCriterion::Geometric`
	)

inline

Creates a standard ExperimentParameters object which works for almost all testing purposes.

If needed you can set the testparticles parameter to a different value than 1.

Definition at line 225 of file setup.h.

                                                            {
   return ExperimentParameters{
       std::make_unique<UniformClock>(0., dt, 300.0),  // labclock
       std::make_unique<UniformClock>(0., 1., 300.0),  // outputclock
       1,                                              // ensembles
       testparticles,                                  // testparticles
       DerivativesMode::CovariantGaussian,             // derivatives mode
       RestFrameDensityDerivativesMode::Off,  // rest frame derivatives mode
       FieldDerivativesMode::ChainRule,       // field derivatives mode
       SmearingMode::CovariantGaussian,       // smearing mode
       1.0,                                   // Gaussian smearing width
       4.0,                                   // Gaussian smearing cut-off
       0.333333,                              // discrete smearing weight
       2.0,                                   // triangular smearing range
       crit,
       true,  // two_to_one
       all_reactions_included(),
       no_multiparticle_reactions(),
       false,  // strings switch
       1.0,
       NNbarTreatment::NoAnnihilation,
       0.,           // low energy sigma_NN cut-off
       false,        // potential_affect_threshold
       -1.0,         // box_length
       200.0,        // max. cross section
       2.5,          // fixed min. cell length
       1.0,          // cross section scaling
       false,        // in thermodynamics outputs spectators are included
       false,        // do weak decays
       true,         // decay initial particles
       std::nullopt  // use monash tune, not known
   };
 }

◆ default_finder_parameters()

ScatterActionsFinderParameters smash::Test::default_finder_parameters	(	double	elastic_parameter = `10`,
		NNbarTreatment	nnbar_treatment = `NNbarTreatment::NoAnnihilation`,
		ReactionsBitSet	included_2to2 = `all_reactions_included()`,
		bool	strings_switch = `true`,
		bool	use_AQM = `false`,
		bool	strings_with_probability = `false`,
		TotalCrossSectionStrategy	xs_strategy = `TotalCrossSectionStrategy::BottomUp`
	)

inline

Creates a standard ScatterActionsFinderParameters object which works for almost all testing purposes.

The selected arguments are changed between different tests.

Definition at line 267 of file setup.h.

                                            {
   StringTransitionParameters default_transition_params{};
   return {elastic_parameter,
           0.,    // low_snn_cut
           1.,    // scale_xs
           0.,    // additional_el_xs
           200.,  // maximum_cross_section
           CollisionCriterion::Geometric,
           nnbar_treatment,
           included_2to2,
           no_multiparticle_reactions(),
           1,      // testparticles
           true,   // two_to_one
           false,  // allow_first_collisions_within_nucleus
           strings_switch,
           use_AQM,
           strings_with_probability,
           true,  // only_warn_for_high_prob
           default_transition_params,
           xs_strategy,
           PseudoResonance::None};
 }

◆ default_event_info()

EventInfo smash::Test::default_event_info	(	double	impact_parameter = `0.0`,
		bool	empty_event = `false`
	)

inline

Creates default EventInfo object for testing purposes.

Definition at line 298 of file setup.h.

                                                               {
   return EventInfo{impact_parameter, 0.0,  0.0, 0.0, 0.0, 0.0, 1, 1,
                    empty_event,      false};
 }

◆ default_string_process_interface()

std::unique_ptr<StringProcess> smash::Test::default_string_process_interface ( )

inline

Creates a default StringProcessInterface object for testing.

Definition at line 305 of file setup.h.

                                                                        {
   return std::make_unique<StringProcess>(
       1.0,      // String_Tension
       1.0,      // String_Formation_Time
       0.5,      // Gluon_Beta
       0.001,    // Gluon_Pmin
       2.0,      // Quark_Alpha
       7.0,      // Quark_Beta
       0.16,     // Strange_Supp
       0.036,    // Diquark_Supp
       0.42,     // Sigma_Perp
       0.2,      // StringZ_A_Leading
       2.0,      // StringZ_B_Leading
       2.0,      // StringZ_A
       0.55,     // StringZ_B
       0.5,      // String_Sigma_T
       1.0,      // Form_Time_Factor
       false,    // Mass_Dependent_Formation_Times
       1. / 3.,  // Prob_proton_to_d_uu
       true,     // Separate_Fragment_Baryon
       0.15,     // Popcorn_Rate
       false);   // Use_Monash_Tune
 }

Variable Documentation

◆ smashon_mass

constexpr double smash::Test::smashon_mass = 0.123

staticconstexpr

The mass of the smashon particle.

Definition at line 57 of file setup.h.

◆ smashon_width

constexpr double smash::Test::smashon_width = 1.2

staticconstexpr

The decay width of the smashon particle.

Definition at line 59 of file setup.h.

◆ smashon_pdg_string

constexpr const char smash::Test::smashon_pdg_string[] = "661"

staticconstexpr

The PDG code of the smashon particle.

Definition at line 61 of file setup.h.

Classes

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ TEST

◆ TEST_CATCH

◆ TEST_TYPES

◆ VERIFY

◆ COMPARE

◆ COMPARE_ABSOLUTE_ERROR

◆ COMPARE_RELATIVE_ERROR

◆ FUZZY_COMPARE

ulp

Comparing to 0

◆ FAIL

Typedef Documentation

◆ ParticlesPtr

Function Documentation

◆ create_actual_particletypes()

◆ create_actual_decaymodes()

◆ create_smashon_particletypes()

◆ create_stable_smashon_particletypes()

◆ smashon() [1/5]

◆ smashon() [2/5]

◆ smashon() [3/5]

◆ smashon() [4/5]

◆ smashon() [5/5]

◆ smashon_random()

◆ experiment()

◆ create_particle_list()

◆ create_particles() [1/2]

◆ create_particles() [2/2]

◆ all_reactions_included()

◆ no_multiparticle_reactions()

◆ default_parameters()

◆ default_finder_parameters()

◆ default_event_info()

◆ default_string_process_interface()

Variable Documentation

◆ smashon_mass

◆ smashon_width

◆ smashon_pdg_string