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/*****************************************************************************
*
* MODULE: Grass PDE Numerical Library
* AUTHOR(S): Soeren Gebbert, Berlin (GER) Dec 2006
* soerengebbert <at> gmx <dot> de
*
* PURPOSE: Unit tests of math tools
*
* COPYRIGHT: (C) 2000 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
*****************************************************************************/
#include <grass/gis.h>
#include <grass/N_pde.h>
#include "test_gpde_lib.h"
/* prototypes */
static int test_mean_calc(void);
/* *************************************************************** */
/* Perfrome the math tool tests ********************************** */
/* *************************************************************** */
int unit_test_tools(void)
{
int sum = 0;
G_message("\n++ Running math tool unit tests ++");
sum += test_mean_calc();
if (sum > 0)
G_warning("\n-- math tool unit tests failure --");
else
G_message("\n-- math tool unit tests finished successfully --");
return sum;
}
/* *************************************************************** */
/* Test the mean calculation functions *************************** */
/* *************************************************************** */
int test_mean_calc(void)
{
double a, b, mean_n, mean, vector, distance, D, weight;
double v[2];
double array[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
int i;
int sum = 0;
char buff1[10];
for (i = 0; i < 10; i++)
array[i] += i;
a = 1.0 / 3.0;
b = 3.0;
v[0] = a;
v[1] = b;
/*arith mean */
mean = N_calc_arith_mean(a, b);
G_message("N_calc_arith_mean: calc a %g and b %g = %12.18lf", a, b, mean);
mean_n = N_calc_arith_mean_n(v, 2);
G_message("N_calc_arith_mean_n: calc a %g and b %g = %12.18lf", v[0], v[1],
mean_n);
if (mean != mean_n)
sum++;
/*geom mean */
mean = N_calc_geom_mean(a, b);
G_message("N_calc_geom_mean: calc a %g and b %g = %12.18lf", a, b, mean);
mean_n = N_calc_geom_mean_n(v, 2);
G_message("N_calc_geom_mean_n: calc a %g and b %g = %12.18lf", v[0], v[1],
mean_n);
if (mean != mean_n)
sum++;
/*harmonic mean */
mean = N_calc_harmonic_mean(a, b);
G_message("N_calc_harmonic_mean: calc a %g and b %g = %12.18lf", a, b,
mean);
mean_n = N_calc_harmonic_mean_n(v, 2);
G_message("N_calc_harmonic_mean_n: calc a %g and b %g = %12.18lf", v[0],
v[1], mean_n);
if (mean != mean_n)
sum++;
/*null test */
a = 2;
b = 0;
v[0] = a;
v[1] = b;
mean = N_calc_harmonic_mean(a, b);
G_message("N_calc_harmonic_mean: calc a %g and b %g = %12.18lf", a, b,
mean);
mean_n = N_calc_harmonic_mean_n(v, 2);
G_message("N_calc_harmonic_mean_n: calc a %g and b %g = %12.18lf", v[0],
v[1], mean_n);
if (mean != mean_n)
sum++;
/*quadratic mean */
a = 1.0 / 3.0;
b = 3.0;
v[0] = a;
v[1] = b;
mean = N_calc_quad_mean(a, b);
G_message("N_calc_quad_mean: calc a %g and b %g = %12.18lf", a, b, mean);
mean_n = N_calc_quad_mean_n(v, 2);
G_message("N_calc_quad_mean_n: calc a %g and b %g = %12.18lf", v[0], v[1],
mean_n);
if (mean != mean_n)
sum++;
/*Test the full upwind stabailization */
vector = -0.000001;
distance = 20;
D = 0.000001;
weight = N_full_upwinding(vector, distance, D);
G_message("N_full_upwinding: vector %g distance %g D %g weight %g\n",
vector, distance, D, weight);
if (weight != 0) {
G_warning("Error detected in N_full_upwinding");
sum++;
}
vector = 0.000001;
weight = N_full_upwinding(vector, distance, D);
G_message("N_full_upwinding: vector %g distance %g D %g weight %g\n",
vector, distance, D, weight);
if (weight != 1) {
G_warning("Error detected in N_full_upwinding");
sum++;
}
D = 0.0;
weight = N_full_upwinding(vector, distance, D);
G_message("N_full_upwinding: vector %g distance %g D %g weight %g\n",
vector, distance, D, weight);
if (weight != 0.5) {
G_warning("Error detected in N_full_upwinding");
sum++;
}
/*Test the exponential upwind stabailization */
vector = -0.000001;
distance = 20;
D = 0.000001;
weight = N_exp_upwinding(vector, distance, D);
G_message("N_exp_upwinding: vector %g distance %g D %g weight %g\n", vector,
distance, D, weight);
sprintf(buff1, "%1.2lf", weight);
sscanf(buff1, "%lf", &weight);
if (weight != 0.05) {
G_warning("Error detected in N_exp_upwinding");
sum++;
}
vector = 0.000001;
weight = N_exp_upwinding(vector, distance, D);
G_message("N_exp_upwinding: vector %g distance %g D %g weight %g\n", vector,
distance, D, weight);
sprintf(buff1, "%1.2lf", weight);
sscanf(buff1, "%lf", &weight);
if (weight != 0.95) {
G_warning("Error detected in N_exp_upwinding");
sum++;
}
D = 0.0;
weight = N_exp_upwinding(vector, distance, D);
G_message("N_exp_upwinding: vector %g distance %g D %g weight %g\n", vector,
distance, D, weight);
if (weight != 0.5) {
G_warning("Error detected in N_exp_upwinding");
sum++;
}
return sum;
}
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