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test_tools.cpp
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test_tools.cpp
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#include "test_tools.h"
// isnan, isinf
#include <cmath>
// srand, rand
#include <stdlib.h>
#include <iostream>
// =============================================================================
// VECTOR HELPER
// =============================================================================
void printVector(const std::vector<double>& v) {
const size_t n = v.size();
for (auto i = 0; i < n; i++) {
std::cout << v[i] << " ";
}
std::cout << std::endl;
}
// =============================================================================
// ARRAY FILL HELPERS:
// This is mainly used to fill inputs for the test functions
// =============================================================================
// -----------------------------------------------------------------------------
// DOUBLES - Random real values
// -----------------------------------------------------------------------------
// return a random double in [a,b)
inline double randomDouble(int a, int b) {
return (b - a)*((double) rand()/(double) RAND_MAX) + a;
}
// Fill the array ary of size n with random values in [a,b)
std::vector<double> randomFill(int a, int b, size_t n) {
std::vector<double> y(n);
for (size_t i = 0; i < n; i++) {
y[i] = randomDouble(a, b);
}
return y;
}
// Fill the array ary of size n random values in [0,1)
std::vector<double> randomFill(size_t n) {
return randomFill(0, 1, n);
}
// Fill the array ary of size n with random values x in [a,b)
// whose truncated value is even
std::vector<double> randomEvenFill(int a, int b, size_t n) {
std::vector<double> y(n);
for (size_t i = 0; i < n; i++) {
double t = randomDouble(a, b);
while (((int) trunc(t)) % 2 != 0) {
t = randomDouble(a, b);
}
y[i] = t;
}
return y;
}
// -----------------------------------------------------------------------------
// FLOATING POINTS - Random real values
// -----------------------------------------------------------------------------
//FLOATING POINTS - return a random double in [a,b)
inline float randomDoubleFloat(int a, int b) {
return (b - a)*((float) rand()/(float) RAND_MAX) + a;
}
//FLOATING POINTS - Fill the array ary of size n with random values in [a,b)
std::vector<float> randomFillFloat(int a, int b, size_t n) {
std::vector<float> y(n);
for (size_t i = 0; i < n; i++) {
y[i] = randomDoubleFloat(a, b);
}
return y;
}
//FLOATING POINTS - Fill the array ary of size n random values in [0,1)
std::vector<float> randomFillFloat(size_t n) {
return randomFillFloat(0, 1, n);
}
//FLOATING POINTS - Fill the array ary of size n with random values x in [a,b)
// whose truncated value is even
std::vector<float> randomEvenFillFloat(int a, int b, size_t n) {
std::vector<float> y(n);
for (size_t i = 0; i < n; i++) {
float t = randomDoubleFloat(a, b);
while (((int) trunc(t)) % 2 != 0) {
t = randomDoubleFloat(a, b);
}
y[i] = t;
}
return y;
}
// -----------------------------------------------------------------------------
// Random integer values (as double)
// -----------------------------------------------------------------------------
// return a random integer (as double) in [a,b]
inline double randomInteger(int a, int b) {
int x = a + (rand() % (int)(b - a + 1));
return (double) x;
}
// Fill the array ary of size n with random integer values in [a,b)
std::vector<double> randomIntFill(int a, int b, size_t n) {
std::vector<double> y(n);
for (size_t i = 0; i < n; i++) {
y[i] = randomInteger(a, b);
}
return y;
}
// -----------------------------------------------------------------------------
// Random integer values (as FLOAT)
// -----------------------------------------------------------------------------
// return a random integer (as float) in [a,b]
inline float randomIntegerFloat(int a, int b) {
int x = a + (rand() % (int)(b - a + 1));
return (float) x;
}
// Fill the array ary of size n with random integer values in [a,b)
std::vector<float> randomIntFillFloat(int a, int b, size_t n) {
std::vector<float> y(n);
for (size_t i = 0; i < n; i++) {
y[i] = randomIntegerFloat(a, b);
}
return y;
}
// -----------------------------------------------------------------------------
// Fixed values
// -----------------------------------------------------------------------------
// Fill the array ary of size n with a given value
std::vector<double> valueFill(double d, size_t n) {
std::vector<double> ary(n);
for (size_t i = 0; i < n; i++) {
ary[i] = d;
}
return ary;
}
// Fill the array ary of size n with a given value
std::vector<double> zeroFill(size_t n) {
return valueFill(0, n);
}
// -----------------------------------------------------------------------------
// Fixed values FLOAT
// -----------------------------------------------------------------------------
// Fill the array ary of size n with a given value
std::vector<float> valueFillFloat(float d, size_t n) {
std::vector<float> ary(n);
for (size_t i = 0; i < n; i++) {
ary[i] = d;
}
return ary;
}
// Fill the array ary of size n with a given value
std::vector<float> zeroFillFloat(size_t n) {
return valueFillFloat(0, n);
}
// =============================================================================
// ERROR HELPERS:
// Mainly used to compute the error betweem a reference and an expected value
// in the test functions
// =============================================================================
// Compute the absolute error between val and expected
double absoluteError(double val, double trueValue) {
return std::abs(val - trueValue);
}
// Compute the relative error between val and expected
double relativeError(double val, double trueValue) {
// this should be discussed
if (trueValue == 0) {
return absoluteError(val, trueValue);
} else {
return absoluteError(val, trueValue)/trueValue;
}
}