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Commit a42ceecb authored by Rahil Doshi's avatar Rahil Doshi
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Update tests to check for accuracy, performance of C++ interpolation methods

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src/pymatlib/core/cpp/test_interpolation.cpp
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#include "interpolate_binary_search_cpp.h" #include "interpolate_binary_search_cpp.h"
#include "interpolate_double_lookup_cpp.h" #include "interpolate_double_lookup_cpp.h"
#include <array> #include <array>
#include <vector>
#include <random> #include <random>
#include <chrono> #include <chrono>
#include <iomanip> #include <iomanip>
#include <cassert> #include <cassert>
#include <iostream> #include <iostream>
#include <numeric>
#include "TestArrayContainer.hpp" #include "TestArrayContainer.hpp"
/*
void run_comprehensive_tests1() {
std::cout << "\nRunning comprehensive interpolation tests...\n" << std::endl;
// Test Case 1: Basic ascending arrays
{
std::vector<double> T = {100.0, 200.0, 300.0, 400.0, 500.0};
std::vector<double> E = {1.0, 2.0, 3.0, 4.0, 5.0};
// Test middle interpolation
double result = interpolate_binary_search_cpp(T, 2.5, E);
assert(std::abs(result - 250.0) < 1e-8);
std::cout << "Basic ascending test passed" << std::endl;
}
// Test Case 2: Descending arrays
{
std::vector<double> T = {500.0, 400.0, 300.0, 200.0, 100.0};
std::vector<double> E = {5.0, 4.0, 3.0, 2.0, 1.0};
double result = interpolate_binary_search_cpp(T, 2.5, E);
assert(std::abs(result - 250.0) < 1e-8);
std::cout << "Descending array test passed" << std::endl;
}
// Test Case 3: Edge cases
{
std::vector<double> T = {100.0, 200.0, 300.0};
std::vector<double> E = {1.0, 2.0, 3.0};
// Test below minimum
double result = interpolate_binary_search_cpp(T, 0.5, E);
assert(std::abs(result - 100.0) < 1e-8);
// Test above maximum
result = interpolate_binary_search_cpp(T, 3.5, E);
assert(std::abs(result - 300.0) < 1e-8);
std::cout << "Edge cases test passed" << std::endl;
}
// Test Case 4: Double lookup specific tests
{
std::vector<double> T_eq = {100.0, 200.0, 300.0, 400.0, 500.0};
std::vector<double> E_neq = {1.0, 2.1, 3.4, 4.2, 5.0};
std::vector<double> E_eq = {1.0, 2.0, 3.0, 4.0, 5.0};
double inv_delta_E_eq = 1.0;
std::vector<double> idx_map = {0, 0, 1, 2, 3};
double result = interpolate_double_lookup_cpp(2.5, T_eq, E_neq, E_eq,
inv_delta_E_eq, idx_map);
std::cout << result << std::endl;
// assert(std::abs(result - 230.769) < 1e-6);
std::cout << "Double lookup basic test passed" << std::endl;
}
// Test Case 5: Performance comparison
{
const size_t size = 1000000;
std::vector<double> T(size);
std::vector<double> E(size);
std::vector<double> E_eq(size);
std::vector<double> idx_map(size);
// Initialize arrays
for(size_t i = 0; i < size; ++i) {
T[i] = static_cast<double>(i);
E[i] = static_cast<double>(i) * 1.5;
E_eq[i] = static_cast<double>(i);
idx_map[i] = i;
}
double inv_delta_E_eq = 1.0;
// Time binary search
auto start = std::chrono::high_resolution_clock::now();
double result1 = interpolate_binary_search_cpp(T, 500000.5, E);
std::cout << result1 << std::endl;
auto end = std::chrono::high_resolution_clock::now();
auto binary_duration = std::chrono::duration_cast<std::chrono::nanoseconds>
(end - start).count();
// Time double lookup
start = std::chrono::high_resolution_clock::now();
double result2 = interpolate_double_lookup_cpp(500000.5, T, E, E_eq,
inv_delta_E_eq, idx_map);
std::cout << result2 << std::endl;
end = std::chrono::high_resolution_clock::now();
auto double_duration = std::chrono::duration_cast<std::chrono::nanoseconds>
(end - start).count();
std::cout << "\nPerformance test results:" << std::endl;
std::cout << "Binary search: " << binary_duration << " ns" << std::endl;
std::cout << "Double lookup: " << double_duration << " ns" << std::endl;
}
// Test Case 6: Error handling
{
try {
std::vector<double> T = {100.0};
std::vector<double> E = {1.0};
interpolate_binary_search_cpp(T, 1.5, E);
assert(false && "Should throw exception for size < 2");
} catch (const std::runtime_error&) {
std::cout << "Size validation test passed" << std::endl;
}
}
// Test Case 7: Non-uniform spacing
{
std::vector<double> T = {100.0, 150.0, 300.0, 320.0, 500.0};
std::vector<double> E = {1.0, 1.5, 3.0, 3.2, 5.0};
double result = interpolate_binary_search_cpp(T, 2.0, E);
std::cout << "Non-uniform spacing test passed" << std::endl;
}
}
*/
/*
void run_comprehensive_tests2() {
std::cout << "\nRunning comprehensive interpolation tests...\n" << std::endl;
// Test Case 1: Basic tests with both std::vector and std::array
{
// Vector version
std::vector<double> T_vec = {100.0, 200.0, 300.0, 400.0};
std::vector<double> E_vec = {1.0, 2.0, 3.0, 4.0};
double result_vec = interpolate_binary_search_cpp(T_vec, 2.5, E_vec);
assert(std::abs(result_vec - 250.0) < 1e-6);
// Array version
std::array<double, 4> T_arr = {100.0, 200.0, 300.0, 400.0};
std::array<double, 4> E_arr = {1.0, 2.0, 3.0, 4.0};
double result_arr = interpolate_binary_search_cpp(T_arr, 2.5, E_arr);
assert(std::abs(result_arr - 250.0) < 1e-6);
std::cout << "Basic vector/array tests passed" << std::endl;
}
// Test Case 2: Descending order with both containers
{
// Vector version
std::vector<double> T_vec = {400.0, 300.0, 200.0, 100.0};
std::vector<double> E_vec = {4.0, 3.0, 2.0, 1.0};
double result_vec = interpolate_binary_search_cpp(T_vec, 2.5, E_vec);
// Array version
std::array<double, 4> T_arr = {400.0, 300.0, 200.0, 100.0};
std::array<double, 4> E_arr = {4.0, 3.0, 2.0, 1.0};
double result_arr = interpolate_binary_search_cpp(T_arr, 2.5, E_arr);
assert(std::abs(result_vec - result_arr) < 1e-8);
std::cout << "Descending order vector/array tests passed" << std::endl;
}
// Test Case 3: Edge cases for both containers
{
// Vector version
std::vector<double> T_vec = {3273.15, 3263.15, 3253.15, 3243.15};
std::vector<double> E_vec = {1.71e10, 1.70e10, 1.69e10, 1.68e10};
double result_vec_min = interpolate_binary_search_cpp(T_vec, 1.67e10, E_vec);
double result_vec_max = interpolate_binary_search_cpp(T_vec, 1.72e10, E_vec);
// Array version
std::array<double, 4> T_arr = {3273.15, 3263.15, 3253.15, 3243.15};
std::array<double, 4> E_arr = {1.71e10, 1.70e10, 1.69e10, 1.68e10};
double result_arr_min = interpolate_binary_search_cpp(T_arr, 1.67e10, E_arr);
double result_arr_max = interpolate_binary_search_cpp(T_arr, 1.72e10, E_arr);
assert(std::abs(result_vec_min - 3243.15) < 1e-6);
assert(std::abs(result_arr_min - 3243.15) < 1e-6);
assert(std::abs(result_vec_max - 3273.15) < 1e-6);
assert(std::abs(result_arr_max - 3273.15) < 1e-6);
std::cout << "Edge cases vector/array tests passed" << std::endl;
}
// Test Case 4: Double lookup with both containers
{
// Vector version
std::vector<double> T_vec = {100.0, 200.0, 300.0, 400.0};
std::vector<double> E_neq_vec = {1.0, 2.1, 3.4, 4.2};
std::vector<double> E_eq_vec = {1.0, 2.0, 3.0, 4.0};
std::vector<double> idx_map_vec = {0, 0, 1, 2};
// Array version
std::array<double, 4> T_arr = {100.0, 200.0, 300.0, 400.0};
std::array<double, 4> E_neq_arr = {1.0, 2.1, 3.4, 4.2};
std::array<double, 4> E_eq_arr = {1.0, 2.0, 3.0, 4.0};
std::array<double, 4> idx_map_arr = {0, 0, 1, 2};
double inv_delta_E_eq = 1.0;
double result_vec = interpolate_double_lookup_cpp(2.5, T_vec, E_neq_vec,
E_eq_vec, inv_delta_E_eq,
idx_map_vec);
double result_arr = interpolate_double_lookup_cpp(2.5, T_arr, E_neq_arr,
E_eq_arr, inv_delta_E_eq,
idx_map_arr);
assert(std::abs(result_vec - result_arr) < 1e-6);
std::cout << "Double lookup vector/array tests passed" << std::endl;
}
// Test Case 5: Error handling for both containers
{
try {
std::vector<double> T_vec = {100.0};
std::vector<double> E_vec = {1.0};
interpolate_binary_search_cpp(T_vec, 1.5, E_vec);
assert(false && "Should throw exception for vector size < 2");
} catch (const std::runtime_error&) {
std::cout << "Vector size validation passed" << std::endl;
}
try {
std::array<double, 1> T_arr = {100.0};
std::array<double, 1> E_arr = {1.0};
interpolate_binary_search_cpp(T_arr, 1.5, E_arr);
assert(false && "Should throw exception for array size < 2");
} catch (const std::runtime_error&) {
std::cout << "Array size validation passed" << std::endl;
}
}
// Test Case 6: Performance comparison between vector and array
{
const size_t size = 1000000;
std::vector<double> T_vec(size);
std::vector<double> E_vec(size);
std::array<double, 1000> T_arr;
std::array<double, 1000> E_arr;
// Initialize containers
for(size_t i = 0; i < size; ++i) {
T_vec[i] = static_cast<double>(i);
E_vec[i] = static_cast<double>(i) * 1.5;
}
for(size_t i = 0; i < 1000; ++i) {
T_arr[i] = static_cast<double>(i);
E_arr[i] = static_cast<double>(i) * 1.5;
}
// Time vector version
auto start = std::chrono::high_resolution_clock::now();
double result_vec = interpolate_binary_search_cpp(T_vec, 500000.5, E_vec);
auto vector_duration = std::chrono::duration_cast<std::chrono::nanoseconds>
(std::chrono::high_resolution_clock::now() - start).count();
// Time array version
start = std::chrono::high_resolution_clock::now();
double result_arr = interpolate_binary_search_cpp(T_arr, 500.5, E_arr);
auto array_duration = std::chrono::duration_cast<std::chrono::nanoseconds>
(std::chrono::high_resolution_clock::now() - start).count();
std::cout << "\nPerformance comparison:" << std::endl;
std::cout << "Vector duration: " << vector_duration << " ns" << std::endl;
std::cout << "Array duration: " << array_duration << " ns" << std::endl;
}
}
*/
// Helper function to compare floating point numbers // Helper function to compare floating point numbers
bool is_equal(double a, double b, double tolerance = 1e-10) { bool is_equal(double a, double b, double tolerance = 1e-10) {
return std::abs(a - b) < tolerance; return std::abs(a - b) < tolerance;
} }
void test_basic_functionality1() {
// Use realistic temperature-enthalpy values from search results
const std::vector<double> T_vec = {2400.0, 2500.0, 2600.0, 2700.0};
const std::vector<double> E_vec = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// Test point should be within the data range
const double test_E = 1.695e10;
const double expected_T = 2550.0; // Midpoint interpolation
// Add tolerance appropriate for temperature values
const double tolerance = 1e-6;
DoubleLookupTests tests;
double result_vec = interpolate_binary_search_cpp(test_E, tests);
assert(std::abs(result_vec - expected_T) < tolerance);
}
void test_basic_functionality() { void test_basic_functionality() {
std::cout << "\nTesting basic functionality..." << std::endl; std::cout << "\nTesting basic functionality..." << std::endl;
// Setup test data with precise values
// Ascending order vectors
const std::vector<double> T_vec = {3243.15, 3253.15, 3263.15, 3273.15};
const std::vector<double> E_vec = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// Ascending order arrays
const std::array<double, 4> T_arr = {3243.15, 3253.15, 3263.15, 3273.15};
const std::array<double, 4> E_arr = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// Test middle point interpolation // Test middle point interpolation
const double test_E = 1.695e10; const double test_E = 16950000000.0;
const double expected_T = 3258.15;
// Binary Search Tests // Binary Search Tests
{ {
DoubleLookupTests tests; BinarySearchTests tests;
double result_arr = interpolate_binary_search_cpp(test_E, tests); double result = tests.interpolateBS(test_E);
assert(is_equal(result_arr, expected_T)); // Expected value based on T_bs array
double expected_T = 3253.15;
// Verify vector and array results match assert(is_equal(result, expected_T));
assert(is_equal(result_vec, result_arr)); std::cout << "Basic binary search interpolation passed" << std::endl;
} }
// Double Lookup Tests // Double Lookup Tests
{ {
// Setup double lookup specific data
// std::vector<double> E_eq_vec = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
std::array<double, 4> E_eq_arr = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// std::vector<double> idx_map_vec = {0, 1, 2, 3};
std::array<double, 4> idx_map_arr = {0, 1, 2, 3};
const double inv_delta_E_eq = 1.0 / (1e9);
/*double result_vec = interpolate_double_lookup_cpp(
test_E, T_vec, E_vec, E_eq_vec, inv_delta_E_eq, idx_map_vec);
assert(is_equal(result_vec, expected_T));*/
DoubleLookupTests tests; DoubleLookupTests tests;
double result_arr = tests.interpolateDL(test_E); double result = tests.interpolateDL(test_E);
/*double result_arr = interpolate_double_lookup_cpp( // Expected value based on T_eq array
test_E, T_arr, E_arr, E_eq_arr, inv_delta_E_eq, idx_map_arr);*/ double expected_T = 3258.15;
assert(is_equal(result_arr, expected_T)); assert(is_equal(result, expected_T));
std::cout << "Basic double lookup interpolation passed" << std::endl;
// Verify vector and array results match
// assert(is_equal(result_vec, result_arr));
} }
} }
void test_edge_cases_and_errors() { void test_edge_cases_and_errors() {
std::cout << "Testing edge cases and error handling..." << std::endl; std::cout << "\nTesting edge cases and error handling..." << std::endl;
// Test data for vectors
const std::vector<double> T_vec = {3243.15, 3253.15, 3263.15, 3273.15};
const std::vector<double> E_vec = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// Test data for arrays // Test boundary values for binary search
const std::array<double, 4> T_arr = {3243.15, 3253.15, 3263.15, 3273.15};
const std::array<double, 4> E_arr = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
// Test boundary values
{ {
// Vector tests BinarySearchTests tests;
/*double result_vec_min = interpolate_binary_search_cpp(T_vec, 1.67e10, E_vec);
double result_vec_max = interpolate_binary_search_cpp(T_vec, 1.72e10, E_vec);
assert(is_equal(result_vec_min, 3243.15));
assert(is_equal(result_vec_max, 3273.15));*/
// Array tests // Test below minimum
DoubleLookupTests tests; double result_min = tests.interpolateBS(16750000000.0);
double result_arr_min = interpolate_binary_search_cpp(1.67e10, tests); assert(is_equal(result_min, 3243.15));
double result_arr_max = interpolate_binary_search_cpp(1.72e10, tests);
assert(is_equal(result_arr_min, 3243.15));
assert(is_equal(result_arr_max, 3273.15));
}
// Error cases // Test above maximum
/*{ double result_max = tests.interpolateBS(17150000000.0);
// Test vector size mismatch assert(is_equal(result_max, 3278.15));
std::vector<double> wrong_size_vec = {1.0};
bool caught_vector_error = false;
try {
interpolate_binary_search_cpp(T_vec, 1.70e10, wrong_size_vec);
} catch (const std::runtime_error&) {
caught_vector_error = true;
}
assert(caught_vector_error);
// For arrays, test with non-monotonic values
std::array<double, 4> non_monotonic_arr = {1.71e10, 1.69e10, 1.70e10, 1.68e10}; // Values not in order
bool caught_array_error = false;
try {
interpolate_binary_search_cpp(T_arr, 1.70e10, non_monotonic_arr);
} catch (const std::runtime_error&) {
caught_array_error = true;
}
assert(caught_array_error);
// Compile-time size check for arrays std::cout << "Edge cases for binary search passed" << std::endl;
static_assert(T_arr.size() >= 2, "Array size must be at least 2"); }
static_assert(E_arr.size() >= 2, "Array size must be at least 2");
}*/
// Double Lookup edge cases // Double Lookup edge cases
{ {
std::vector<double> E_eq_vec = {1.68e10, 1.69e10, 1.70e10, 1.71e10}; DoubleLookupTests tests;
std::vector<double> idx_map_vec = {0, 1, 2, 3};
std::array<double, 4> E_eq_arr = {1.68e10, 1.69e10, 1.70e10, 1.71e10};
std::array<double, 4> idx_map_arr = {0, 1, 2, 3};
const double inv_delta_E_eq = 1.0 / (1e9);
// Test below minimum
double result_min = tests.interpolateDL(16750000000.0);
assert(is_equal(result_min, 3243.15));
// Test above maximum
double result_max = tests.interpolateDL(17150000000.0);
assert(is_equal(result_max, 3273.15));
// Array tests std::cout << "Edge cases for double lookup passed" << std::endl;
DoubleLookupTests tests;
double result_arr_min = tests.interpolateDL(1.67e10);
assert(is_equal(result_arr_min, 3243.15));
} }
} }
void test_interpolation_accuracy() { void test_interpolation_accuracy() {
std::cout << "\nTesting interpolation accuracy..." << std::endl; std::cout << "\nTesting interpolation accuracy..." << std::endl;
// Test data with precise values // Test data with precise values
struct TestCase { struct TestCase {
double input_E; double input_E;
double expected_T; double expected_T_bs;
double expected_T_dl;
double tolerance; double tolerance;
std::string description; std::string description;
}; };
const std::vector<TestCase> test_cases = { const std::vector<TestCase> test_cases = {
// For E=1.705e10 (between 1.70e10 and 1.71e10) // Test cases with expected interpolated values for both methods
{1.705e10, 3268.15, 1e-10, "Mid-point interpolation"}, {16850000000.0, 3245.65, 3248.15, 1e-10, "Quarter-point interpolation"},
// For E=1.695e10 (between 1.69e10 and 1.70e10) {16950000000.0, 3253.15, 3258.15, 1e-10, "Mid-point interpolation"},
{1.695e10, 3258.15, 1e-10, "Quarter-point interpolation"}, {17050000000.0, 3268.15, 3268.15, 1e-10, "Three-quarter-point interpolation"},
// For E=1.685e10 (between 1.68e10 and 1.69e10)
{1.685e10, 3248.15, 1e-10, "Eighth-point interpolation"},
// Near exact points // Near exact points
{1.70e10, 3263.15, 1e-8, "Near-exact point"}, {16900000000.0, 3248.15, 3253.15, 1e-8, "Near-exact point"},
{1.69e10, 3253.15, 1e-8, "Near-exact point"} {17000000000.0, 3258.15, 3263.15, 1e-8, "Near-exact point"}
};
// Setup arrays with high precision values
// For std::vector
const std::vector<double> T_vec = {
3243.15000000, 3253.15000000, 3263.15000000, 3273.15000000
};
const std::vector<double> E_vec = {
1.68000000e10, 1.69000000e10, 1.70000000e10, 1.71000000e10
};
// For std::array
const std::array<double, 4> T_arr = {
3243.15000000, 3253.15000000, 3263.15000000, 3273.15000000
};
const std::array<double, 4> E_arr = {
1.68000000e10, 1.69000000e10, 1.70000000e10, 1.71000000e10
}; };
// Setup for double lookup
std::vector<double> E_eq_vec = {
1.68000000e10, 1.69000000e10, 1.70000000e10, 1.71000000e10
};
std::array<double, 4> E_eq_arr = {
1.68000000e10, 1.69000000e10, 1.70000000e10, 1.71000000e10
};
std::vector<double> idx_map_vec = {0, 1, 2, 3};
std::array<double, 4> idx_map_arr = {0, 1, 2, 3};
const double inv_delta_E_eq = 1.0 / (1e9);
DoubleLookupTests tests;
for (const auto& test : test_cases) { for (const auto& test : test_cases) {
// Binary Search Tests // Binary Search Tests
double result_bin_arr = interpolate_binary_search_cpp(test.input_E, tests); BinarySearchTests bs_tests;
double result_bs = bs_tests.interpolateBS(test.input_E);
assert(is_equal(result_bin_vec, test.expected_T, test.tolerance)); assert(is_equal(result_bs, test.expected_T_bs, test.tolerance));
assert(is_equal(result_bin_arr, test.expected_T, test.tolerance));
assert(is_equal(result_bin_vec, result_bin_arr, test.tolerance));
// Double Lookup Tests // Double Lookup Tests
double result_dl_arr = tests.interpolateDL(test.input_E); DoubleLookupTests dl_tests;
double result_dl = dl_tests.interpolateDL(test.input_E);
assert(is_equal(result_dl, test.expected_T_dl, test.tolerance));
// assert(is_equal(result_dl_vec, test.expected_T, test.tolerance)); std::cout << "Accuracy test passed for " << test.description << std::endl;
assert(is_equal(result_dl_arr, test.expected_T, test.tolerance));
// assert(is_equal(result_dl_vec, result_dl_arr, test.tolerance));
} }
} }
void test_consistency() {
std::cout << "\nTesting interpolation consistency..." << std::endl;
void test_performance() { // Test that small changes in input produce correspondingly small changes in output
std::cout << "\nTesting performance..." << std::endl; BinarySearchTests bs_tests;
DoubleLookupTests dl_tests;
// Test with different sizes const double base_E = 16900000000.0;
const std::vector<size_t> test_sizes = {100, 1000, 10000, 100000}; const double delta_E = 1000000.0; // Small change in energy
for (size_t size : test_sizes) { double base_T_bs = bs_tests.interpolateBS(base_E);
std::cout << "\nTesting with array size: " << size << std::endl; double delta_T_bs = bs_tests.interpolateBS(base_E + delta_E) - base_T_bs;
// Generate test data double base_T_dl = dl_tests.interpolateDL(base_E);
std::vector<double> T_vec(size); double delta_T_dl = dl_tests.interpolateDL(base_E + delta_E) - base_T_dl;
std::vector<double> E_vec(size);
std::vector<double> E_eq_vec(size);
std::vector<double> idx_map_vec(size);
// Fill with realistic values // Check that changes are reasonable (not too large for small input change)
for (size_t i = 0; i < size; ++i) { assert(std::abs(delta_T_bs) < 1.0);
T_vec[i] = 3273.15 + i * 0.01; assert(std::abs(delta_T_dl) < 1.0);
E_vec[i] = 1.71e10 + i * 1e6 + 1e3 * i/2.;
E_eq_vec[i] = 1.71e10 + i * 1e6 + 1e3 * i/2.;
idx_map_vec[i] = i;
}
// Create smaller arrays for comparison std::cout << "Consistency test passed" << std::endl;
constexpr size_t arr_size = 1000; }
std::array<double, arr_size> T_arr;
std::array<double, arr_size> E_arr;
std::array<double, arr_size> E_eq_arr;
std::array<double, arr_size> idx_map_arr;
for (size_t i = 0; i < arr_size; ++i) {
T_arr[i] = T_vec[i];
E_arr[i] = E_vec[i];
E_eq_arr[i] = E_eq_vec[i];
idx_map_arr[i] = idx_map_vec[i];
}
const double inv_delta_E_eq = 1.0 / (1e6); void test_stress() {
const int num_tests = 1000; std::cout << "\nPerforming stress testing..." << std::endl;
// Test points BinarySearchTests bs_tests;
/*std::vector<double> test_points(num_tests); DoubleLookupTests dl_tests;
for (int i = 0; i < num_tests; ++i) {
test_points[i] = 1.70e10 + (i * 1e6);
}*/
// Generate random monotonically increasing test points // Test with extremely large values
std::vector<double> test_points(num_tests); double large_E = 1.0e20;
test_points[0] = 1.70e10; // Start value double result_large_bs = bs_tests.interpolateBS(large_E);
std::random_device rd; double result_large_dl = dl_tests.interpolateDL(large_E);
std::mt19937 gen(rd());
std::uniform_real_distribution<double> dist(1e5, 1e6); // Random increments between 1e5 and 1e6
for (int i = 1; i < num_tests; ++i) { // Test with extremely small values
test_points[i] = test_points[i-1] + dist(gen); double small_E = 1.0e-20;
} double result_small_bs = bs_tests.interpolateBS(small_E);
double result_small_dl = dl_tests.interpolateDL(small_E);
// Measure binary search performance // For extreme values, we should get boundary values
{ assert(is_equal(result_large_bs, 3278.15));
DoubleLookupTests tests; assert(is_equal(result_large_dl, 3273.15));
auto start = std::chrono::high_resolution_clock::now(); assert(is_equal(result_small_bs, 3243.15));
for (const double& E : test_points) { assert(is_equal(result_small_dl, 3243.15));
volatile double result = interpolate_binary_search_cpp(E, tests);
}
auto end = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>(
end - start).count();
std::cout << "Binary Search (vector) time: " << duration << " ns" << std::endl;
}
{ std::cout << "Stress tests passed" << std::endl;
DoubleLookupTests tests; }
auto start = std::chrono::high_resolution_clock::now();
for (const double& E : test_points) { void test_random_validation() {
volatile double result = interpolate_binary_search_cpp(E, tests); std::cout << "\nTesting with random inputs..." << std::endl;
}
auto end = std::chrono::high_resolution_clock::now(); BinarySearchTests bs_tests;
auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>( DoubleLookupTests dl_tests;
end - start).count();
std::cout << "Binary Search (array) time: " << duration << " ns" << std::endl; std::random_device rd;
std::mt19937 gen(rd());
std::uniform_real_distribution<double> dist(16800000000.0, 17100000000.0);
const int num_tests = 1000;
for (int i = 0; i < num_tests; ++i) {
double random_E = dist(gen);
double result_bs = bs_tests.interpolateBS(random_E);
double result_dl = dl_tests.interpolateDL(random_E);
// Results should be within the temperature range
assert(result_bs >= 3243.15 && result_bs <= 3278.15);
assert(result_dl >= 3243.15 && result_dl <= 3273.15);
}
std::cout << "Random input validation passed" << std::endl;
}
void test_performance() {
std::cout << "\nTesting performance..." << std::endl;
// Configuration parameters
constexpr int warmupSteps = 5;
constexpr int outerIterations = 10;
constexpr int numCells = 64*64*64;
// Setup test data
SS316L test;
std::vector<double> random_energies(numCells);
// Generate random values
std::random_device rd;
std::mt19937 gen(rd());
const double E_min = SS316L::E_neq.front() * 0.8;
const double E_max = SS316L::E_neq.back() * 1.2;
std::uniform_real_distribution<double> dist(E_min, E_max);
// Fill random energies
for(auto& E : random_energies) {
E = dist(gen);
}
// Warmup runs
std::cout << "Performing warmup steps..." << std::endl;
for(int i = 0; i < warmupSteps; ++i) {
for(const double& E : random_energies) {
// volatile double result = interpolate_double_lookup_cpp(E, test);
volatile double result = test.interpolateDL(E);
}
}
for(int i = 0; i < warmupSteps; ++i) {
for(const double& E : random_energies) {
volatile double result = test.interpolateBS(E);
} }
}
// Measure double lookup performance // Performance measurement
std::cout << "\nStarting performance measurement..." << std::endl;
std::vector<double> timings_binary;
std::vector<double> timings_double_lookup;
for(int iter = 0; iter < outerIterations; ++iter) {
std::cout << "\nIteration " << iter + 1 << "/" << outerIterations << std::endl;
// Double Lookup timing
{ {
DoubleLookupTests tests; const auto start1 = std::chrono::high_resolution_clock::now();
auto start = std::chrono::high_resolution_clock::now(); for(const double& E : random_energies) {
for (const double& E : test_points) { volatile double result = test.interpolateDL(E);
volatile double result = tests.interpolateDL(E);
} }
auto end = std::chrono::high_resolution_clock::now(); const auto end1 = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>( const auto duration1 = std::chrono::duration_cast<std::chrono::nanoseconds>(
end - start).count(); end1 - start1).count();
std::cout << "Double Lookup (vector) time: " << duration << " ns" << std::endl; timings_double_lookup.push_back(static_cast<double>(duration1));
std::cout << "Double Lookup - Iteration time: " << duration1 << " ns" << std::endl;
} }
// Binary Search timing
{ {
auto start = std::chrono::high_resolution_clock::now(); const auto start2 = std::chrono::high_resolution_clock::now();
for (const double& E : test_points) { for(const double& E : random_energies) {
DoubleLookupTests tests; volatile double result = test.interpolateBS(E);
volatile double result = tests.interpolateDL(E);
} }
auto end = std::chrono::high_resolution_clock::now(); const auto end2 = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::nanoseconds>( const auto duration2 = std::chrono::duration_cast<std::chrono::nanoseconds>(
end - start).count(); end2 - start2).count();
std::cout << "Double Lookup (array) time: " << duration << " ns" << std::endl; timings_binary.push_back(static_cast<double>(duration2));
std::cout << "Binary Search - Iteration time: " << duration2 << " ns" << std::endl;
} }
} }
// Calculate and print statistics
auto calc_stats = [](const std::vector<double>& timings) {
double sum = std::accumulate(timings.begin(), timings.end(), 0.0);
double mean = sum / static_cast<double>(timings.size());
double sq_sum = std::inner_product(timings.begin(), timings.end(),
timings.begin(), 0.0);
double stdev = std::sqrt(sq_sum / static_cast<double>(timings.size()) - mean * mean);
return std::make_pair(mean, stdev);
};
auto [binary_mean, binary_stdev] = calc_stats(timings_binary);
auto [lookup_mean, lookup_stdev] = calc_stats(timings_double_lookup);
std::cout << "\nPerformance Results (" << numCells << " cells, "
<< outerIterations << " iterations):" << std::endl;
std::cout << "Binary Search:" << std::endl;
std::cout << " Mean time: " << binary_mean << " ± " << binary_stdev << " ns" << std::endl;
std::cout << " Per cell: " << binary_mean/numCells << " ns" << std::endl;
std::cout << "Double Lookup:" << std::endl;
std::cout << " Mean time: " << lookup_mean << " ± " << lookup_stdev << " ns" << std::endl;
std::cout << " Per cell: " << lookup_mean/numCells << " ns" << std::endl;
} }
...@@ -607,6 +291,9 @@ int main() { ...@@ -607,6 +291,9 @@ int main() {
test_basic_functionality(); test_basic_functionality();
test_edge_cases_and_errors(); test_edge_cases_and_errors();
test_interpolation_accuracy(); test_interpolation_accuracy();
test_consistency();
test_stress();
test_random_validation();
test_performance(); test_performance();
std::cout << "\nAll tests completed successfully!" << std::endl; std::cout << "\nAll tests completed successfully!" << std::endl;
......
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