test_statistics.c File Reference

C test module for PICurv. More...

#include "test_support.h"
#include "particle_statistics.h"
#include <stdio.h>
#include <string.h>

Include dependency graph for test_statistics.c:

Go to the source code of this file.

Functions
static PetscErrorCode	TestComputeParticleMSDWritesCSV (void)
	Test-local routine.
static PetscErrorCode	TestComputeParticleMSDEmptySwarmNoOutput (void)
	Test-local routine.
int	main (int argc, char **argv)
	Entry point for this unit-test binary.

Detailed Description

C test module for PICurv.

Definition in file test_statistics.c.

Function Documentation

TestComputeParticleMSDWritesCSV()

static PetscErrorCode TestComputeParticleMSDWritesCSV ( void  )

static

Test-local routine.

Definition at line 16 of file test_statistics.c.

{
    SimCtx *simCtx = NULL;
    UserCtx *user = NULL;
    char tmpdir[PETSC_MAX_PATH_LEN];
    char csv_prefix[PETSC_MAX_PATH_LEN];
    char csv_path[PETSC_MAX_PATH_LEN];
    FILE *file = NULL;
    char header[512];
    char row[512];
    PetscReal (*pos_arr)[3] = NULL;
 
    PetscFunctionBeginUser;
    PetscCall(PicurvCreateMinimalContexts(&simCtx, &user, 4, 4, 4));
    PetscCall(PicurvCreateSwarmPair(user, 2, "ske"));
    simCtx->dt = 1.0;
    simCtx->ren = 1.0;
    simCtx->schmidt_number = 1.0;
    simCtx->psrc_x = 0.0;
    simCtx->psrc_y = 0.0;
    simCtx->psrc_z = 0.0;
 
    PetscCall(PicurvMakeTempDir(tmpdir, sizeof(tmpdir)));
    PetscCall(PetscSNPrintf(csv_prefix, sizeof(csv_prefix), "%s/stats", tmpdir));
    PetscCall(PetscSNPrintf(csv_path, sizeof(csv_path), "%s_msd.csv", csv_prefix));
 
    PetscCall(DMSwarmGetField(user->swarm, "position", NULL, NULL, (void *)&pos_arr));
    pos_arr[0][0] = 1.0;
    pos_arr[0][1] = 0.0;
    pos_arr[0][2] = 0.0;
    pos_arr[1][0] = -1.0;
    pos_arr[1][1] = 0.0;
    pos_arr[1][2] = 0.0;
    PetscCall(DMSwarmRestoreField(user->swarm, "position", NULL, NULL, (void *)&pos_arr));
 
    PetscCall(ComputeParticleMSD(user, csv_prefix, 1));
    PetscCall(PicurvAssertFileExists(csv_path, "ComputeParticleMSD should emit a CSV summary"));
 
    file = fopen(csv_path, "r");
    PetscCheck(file != NULL, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Failed to open generated stats CSV '%s'.", csv_path);
    PetscCheck(fgets(header, sizeof(header), file) != NULL, PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "CSV header is missing.");
    PetscCheck(fgets(row, sizeof(row), file) != NULL, PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "CSV data row is missing.");
    fclose(file);
 
    PetscCall(PicurvAssertBool((PetscBool)(strstr(header, "MSD_total") != NULL),
                               "MSD CSV header should contain MSD_total"));
    PetscCall(PicurvAssertBool((PetscBool)(strstr(row, "2") != NULL),
                               "MSD CSV row should include the particle count"));
 
    PetscCall(PicurvDestroyMinimalContexts(&simCtx, &user));
    PetscFunctionReturn(0);
}

Here is the call graph for this function:

Here is the caller graph for this function:

TestComputeParticleMSDEmptySwarmNoOutput()

static PetscErrorCode TestComputeParticleMSDEmptySwarmNoOutput ( void  )

static

Test-local routine.

Definition at line 72 of file test_statistics.c.

{
    SimCtx *simCtx = NULL;
    UserCtx *user = NULL;
    char tmpdir[PETSC_MAX_PATH_LEN];
    char csv_prefix[PETSC_MAX_PATH_LEN];
    char csv_path[PETSC_MAX_PATH_LEN];
    PetscBool exists = PETSC_FALSE;
 
    PetscFunctionBeginUser;
    PetscCall(PicurvCreateMinimalContexts(&simCtx, &user, 4, 4, 4));
    PetscCall(PicurvCreateSwarmPair(user, 0, "ske"));
 
    PetscCall(PicurvMakeTempDir(tmpdir, sizeof(tmpdir)));
    PetscCall(PetscSNPrintf(csv_prefix, sizeof(csv_prefix), "%s/stats", tmpdir));
    PetscCall(PetscSNPrintf(csv_path, sizeof(csv_path), "%s_msd.csv", csv_prefix));
 
    PetscCall(ComputeParticleMSD(user, csv_prefix, 5));
    PetscCall(VerifyPathExistence(csv_path, PETSC_FALSE, PETSC_TRUE, "MSD CSV for empty swarm", &exists));
    PetscCall(PicurvAssertBool((PetscBool)!exists,
                               "ComputeParticleMSD should not write output when no particles are present"));
 
    PetscCall(PicurvDestroyMinimalContexts(&simCtx, &user));
    PetscFunctionReturn(0);
}

Here is the call graph for this function:

Here is the caller graph for this function:

main()

int main	(	int	argc,
		char **	argv
	)

Entry point for this unit-test binary.

Definition at line 101 of file test_statistics.c.

{
    PetscErrorCode ierr;
    const PicurvTestCase cases[] = {
        {"compute-particle-msd-writes-csv", TestComputeParticleMSDWritesCSV},
        {"compute-particle-msd-empty-swarm-no-output", TestComputeParticleMSDEmptySwarmNoOutput},
    };
 
    ierr = PetscInitialize(&argc, &argv, NULL, "PICurv statistics tests");
    if (ierr) {
        return (int)ierr;
    }
 
    ierr = PicurvRunTests("unit-post-statistics", cases, sizeof(cases) / sizeof(cases[0]));
    if (ierr) {
        PetscFinalize();
        return (int)ierr;
    }
 
    ierr = PetscFinalize();
    return (int)ierr;
}

Here is the call graph for this function: