squiggle.c/test/test.c

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#include "../squiggle.h"
#include <stdint.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
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#define N 1000 * 1000
#define PERCENTAGE_TOLERANCE_UNIFORM 1.0/1000.0
#define PERCENTAGE_TOLERANCE_NORMAL 5.0/1000.0
#define MAX_NAME_LENGTH 500
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// Structs
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struct array_expectations {
double* array;
int n;
char* name;
double expected_mean;
double expected_std;
double tolerance;
};
void test_array_expectations(struct array_expectations e){
double mean = array_mean(e.array, e.n);
double delta_mean = mean - e.expected_mean;
double std = array_std(e.array, e.n);
double delta_std = std - e.expected_std;
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if(fabs(delta_mean) > e.tolerance){
printf("[-] Mean test for %s NOT passed.\n", e.name);
printf("Mean of %s: %f, vs expected mean: %f, delta: %f\n", e.name, mean, e.expected_mean, delta_mean);
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}else {
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printf("[x] Mean test for %s PASSED\n", e.name);
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}
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if(fabs(delta_std) > e.tolerance){
printf("[-] Std test for %s NOT passed.\n", e.name);
printf("Std of %s: %f, vs expected std: %f, delta: %f\n", e.name, std, e.expected_std, delta_std);
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}else {
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printf("[x] Std test for %s PASSED\n", e.name);
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}
printf("\n");
}
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// Test unit uniform
void test_unit_uniform(uint64_t* seed){
double* unit_uniform_array = malloc(sizeof(double) * N);
for(int i=0; i<N; i++){
unit_uniform_array[i] = sample_unit_uniform(seed);
}
struct array_expectations expectations = {
.array = unit_uniform_array,
.n = N,
.name = "unit uniform",
.expected_mean = 0.5,
.expected_std = sqrt(1.0/12.0),
.tolerance = 1 * PERCENTAGE_TOLERANCE_UNIFORM,
};
test_array_expectations(expectations);
}
// Test uniforms
void test_uniform(double start, double end, uint64_t* seed){
double* uniform_array = malloc(sizeof(double) * N);
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for(int i=0; i<N; i++){
uniform_array[i] = sample_uniform(start, end, seed);
}
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char* name = malloc(MAX_NAME_LENGTH * sizeof(char));
snprintf(name, MAX_NAME_LENGTH, "[%f, %f] uniform", start, end);
struct array_expectations expectations = {
.array = uniform_array,
.n = N,
.name = name,
.expected_mean = (start + end)/2,
.expected_std = sqrt(1.0/12.0) * fabs(end-start),
.tolerance = fabs(end -start) * PERCENTAGE_TOLERANCE_UNIFORM,
};
test_array_expectations(expectations);
free(name);
}
// Test unit normal
void test_unit_normal(uint64_t* seed){
double* unit_normal_array = malloc(sizeof(double) * N);
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for(int i=0; i<N; i++){
unit_normal_array[i] = sample_unit_normal(seed);
}
struct array_expectations expectations = {
.array = unit_normal_array,
.n = N,
.name = "unit normal",
.expected_mean = 0,
.expected_std = 1,
.tolerance = 1 * PERCENTAGE_TOLERANCE_NORMAL,
};
test_array_expectations(expectations);
}
// Test normal
void test_normal(double mean, double std, uint64_t* seed){
double* normal_array = malloc(sizeof(double) * N);
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for(int i=0; i<N; i++){
normal_array[i] = sample_normal(mean, std, seed);
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}
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char* name = malloc(MAX_NAME_LENGTH * sizeof(char));
snprintf(name, MAX_NAME_LENGTH, "normal(%f, %f)", mean, std);
struct array_expectations expectations = {
.array = normal_array,
.n = N,
.name = name,
.expected_mean = mean,
.expected_std = std,
.tolerance = std * PERCENTAGE_TOLERANCE_NORMAL,
};
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test_array_expectations(expectations);
free(name);
}
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// Test beta
void test_beta(double a, double b, uint64_t* seed){
double* beta_array = malloc(sizeof(double) * N);
for(int i=0; i<N; i++){
beta_array[i] = sample_beta(a, b, seed);
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}
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char* name = malloc(MAX_NAME_LENGTH * sizeof(char));
snprintf(name, MAX_NAME_LENGTH, "beta(%f, %f)", a, b);
struct array_expectations expectations = {
.array = beta_array,
.n = N,
.name = name,
.expected_mean = a/(a+b),
.expected_std = sqrt((a*b)/(pow(a+b, 2) * (a + b + 1))),
.tolerance = PERCENTAGE_TOLERANCE_UNIFORM,
};
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test_array_expectations(expectations);
free(name);
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}
int main(){
// set randomness seed
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uint64_t* seed = malloc(sizeof(uint64_t));
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*seed = 1000; // xorshift can't start with a seed of 0
printf("Testing unit uniform\n");
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test_unit_uniform(seed);
printf("Testing small uniforms\n");
for(int i=0; i<100; i++){
double start = sample_uniform(-10, 10, seed);
double end = sample_uniform(-10, 10, seed);
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if ( end > start){
test_uniform(start, end, seed);
}
}
printf("Testing wide uniforms\n");
for(int i=0; i<100; i++){
double start = sample_uniform(-1000 * 1000, 1000 * 1000, seed);
double end = sample_uniform(-1000 * 1000, 1000 * 1000, seed);
if ( end > start){
test_uniform(start, end, seed);
}
}
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printf("Testing unit normal\n");
test_unit_normal(seed);
printf("Testing small normals\n");
for(int i=0; i<100; i++){
double mean = sample_normal(-10, 10, seed);
double std = sample_normal(0, 10, seed);
if ( std > 0){
test_normal(mean, std, seed);
}
}
printf("Testing larger normals\n");
for(int i=0; i<100; i++){
double mean = sample_uniform(-1000 * 1000, 1000 * 1000, seed);
double std = sample_uniform(0, 1000 * 1000, seed);
if ( std > 0){
test_normal(mean, std, seed);
}
}
printf("Testing beta distribution\n");
for(int i=0; i<100; i++){
double a = sample_uniform(0, 1000, seed);
double b = sample_uniform(0, 1000, seed);
if ( (a > 0) && ( b >0)){
test_beta(a, b, seed);
}
}
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free(seed);
}