taskflow/unittests/test_utility.cpp at master · HibsStatement/taskflow · GitHub

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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN

#include <doctest.h>

#include <taskflow/utility/traits.hpp>

//#include <taskflow/utility/object_pool.hpp>

#include <taskflow/utility/small_vector.hpp>

#include <taskflow/utility/uuid.hpp>

#include <taskflow/utility/iterator.hpp>

#include <taskflow/utility/math.hpp>

// --------------------------------------------------------

// Testcase: SmallVector

// --------------------------------------------------------

TEST_CASE("SmallVector" * doctest::timeout(300)) {

//SUBCASE("constructor")

{

tf::SmallVector<int> vec1;

REQUIRE(vec1.size() == 0);

REQUIRE(vec1.empty() == true);

tf::SmallVector<int, 4> vec2;

REQUIRE(vec2.data() != nullptr);

REQUIRE(vec2.size() == 0);

REQUIRE(vec2.empty() == true);

REQUIRE(vec2.capacity() == 4);

}

//SUBCASE("constructor_n")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec(N);

REQUIRE(vec.size() == N);

REQUIRE(vec.empty() == (N == 0));

REQUIRE(vec.max_size() >= vec.size());

REQUIRE(vec.capacity() >= vec.size());

}

//SUBCASE("copy_constructor")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec1(N);

for(auto& item : vec1) {

item = N;

}

tf::SmallVector<int> vec2(vec1);

REQUIRE(vec1.size() == N);

REQUIRE(vec2.size() == N);

for(size_t i=0; i<vec1.size(); ++i) {

REQUIRE(vec1[i] == vec2[i]);

REQUIRE(vec1[i] == N);

}

//SUBCASE("move_constructor")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec1(N);

for(auto& item : vec1) {

item = N;

}

tf::SmallVector<int> vec2(std::move(vec1));

REQUIRE(vec1.size() == 0);

REQUIRE(vec1.empty() == true);

REQUIRE(vec2.size() == N);

for(size_t i=0; i<vec2.size(); ++i) {

REQUIRE(vec2[i] == N);

}

//SUBCASE("push_back")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec;

size_t pcap {0};

size_t ncap {0};

for(int n=0; n<N; ++n) {

vec.push_back(n);

REQUIRE(vec.size() == n+1);

ncap = vec.capacity();

REQUIRE(ncap >= pcap);

pcap = ncap;

}

for(int n=0; n<N; ++n) {

REQUIRE(vec[n] == n);

}

REQUIRE(vec.empty() == (N == 0));

}

//SUBCASE("pop_back")

{

size_t size {0};

size_t pcap {0};

size_t ncap {0};

tf::SmallVector<int> vec;

for(int N=0; N<=65536; N = (N ? N << 1 : N + 1)) {

vec.push_back(N);

++size;

REQUIRE(vec.size() == size);

if(N % 4 == 0) {

vec.pop_back();

--size;

REQUIRE(vec.size() == size);

}

ncap = vec.capacity();

REQUIRE(ncap >= pcap);

pcap = ncap;

}

REQUIRE(vec.size() == size);

for(size_t i=0; i<vec.size(); ++i) {

REQUIRE(vec[i] % 4 != 0);

}

//SUBCASE("iterator")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec;

for(int n=0; n<N; ++n) {

vec.push_back(n);

REQUIRE(vec.size() == n+1);

}

// non-constant iterator

{

int val {0};

for(auto item : vec) {

REQUIRE(item == val);

++val;

}

// constant iterator

{

int val {0};

for(const auto& item : vec) {

REQUIRE(item == val);

++val;

}

// change the value

{

for(auto& item : vec) {

item = 1234;

}

for(auto& item : vec) {

REQUIRE(item == 1234);

}

//SUBCASE("clear")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec(N);

auto cap = vec.capacity();

REQUIRE(vec.size() == N);

vec.clear();

REQUIRE(vec.size() == 0);

REQUIRE(vec.capacity() == cap);

}

//SUBCASE("comparison")

{

for(int N=0; N<=65536; N = (N ? N << 1 : 1)) {

tf::SmallVector<int> vec1;

for(int i=0; i<N; ++i) {

vec1.push_back(i);

}

tf::SmallVector<int> vec2(vec1);

REQUIRE(vec1 == vec2);

}

// --------------------------------------------------------

// Testcase: distance

// --------------------------------------------------------

TEST_CASE("distance.integral" * doctest::timeout(300)) {

auto count = [] (int beg, int end, int step) {

size_t c = 0;

for(int i=beg; step > 0 ? i < end : i > end; i += step) {

++c;

}

return c;

};

for(int beg=-50; beg<=50; ++beg) {

for(int end=-50; end<=50; ++end) {

if(beg < end) { // positive step

for(int s=1; s<=50; s++) {

REQUIRE((tf::distance(beg, end, s) == count(beg, end, s)));

}

else { // negative step

for(int s=-1; s>=-50; s--) {

REQUIRE((tf::distance(beg, end, s) == count(beg, end, s)));

}

// --------------------------------------------------------

// Testcase: ObjectPool.Sequential

// --------------------------------------------------------

// Due to random # generation, this threaded program has a bug

void test_threaded_uuid(size_t N) {

std::vector<tf::UUID> uuids(65536);

// threaded

std::mutex mutex;

std::vector<std::thread> threads;

for(size_t i=0; i<N; ++i) {

threads.emplace_back([&](){

for(int j=0; j<1000; ++j) {

std::lock_guard<std::mutex> lock(mutex);

uuids.push_back(tf::UUID());

}

});

}

for(auto& t : threads) {

t.join();

}

auto size = uuids.size();

std::sort(uuids.begin(), uuids.end());

auto it = std::unique(uuids.begin(), uuids.end());

REQUIRE(it - uuids.begin() == size);

}

TEST_CASE("uuid.10threads") {

test_threaded_uuid(10);

}

TEST_CASE("uuid.100threads") {

test_threaded_uuid(100);

}

TEST_CASE("uuid") {

tf::UUID u1, u2, u3, u4;

// Comparator.

REQUIRE(u1 == u1);

// Copy

u2 = u1;

REQUIRE(u1 == u2);

// Move

u3 = std::move(u1);

REQUIRE(u2 == u3);

// Copy constructor

tf::UUID u5(u4);

REQUIRE(u5 == u4);

// Move constructor.

tf::UUID u6(std::move(u4));

REQUIRE(u5 == u6);

// Uniqueness

std::vector<tf::UUID> uuids(65536);

std::sort(uuids.begin(), uuids.end());

auto it = std::unique(uuids.begin(), uuids.end());

REQUIRE(it - uuids.begin() == 65536);

}

// --------------------------------------------------------

// Testcase: ObjectPool.Sequential

// --------------------------------------------------------

struct Poolable {

std::string str;

std::vector<int> vec;

int a;

char b;

TF_ENABLE_POOLABLE_ON_THIS;

};

TEST_CASE("ObjectPool.Sequential" * doctest::timeout(300)) {

for(unsigned w=1; w<=4; w++) {

tf::ObjectPool<Poolable> pool(w);

REQUIRE(pool.num_heaps() > 0);

REQUIRE(pool.num_local_heaps() > 0);

REQUIRE(pool.num_global_heaps() > 0);

REQUIRE(pool.num_bins_per_local_heap() > 0);

REQUIRE(pool.num_objects_per_bin() > 0);

REQUIRE(pool.num_objects_per_block() > 0);

REQUIRE(pool.emptiness_threshold() > 0);

// fill out all objects

size_t N = 100*pool.num_objects_per_block();

std::set<Poolable*> set;

for(size_t i=0; i<N; ++i) {

auto item = pool.animate();

REQUIRE(set.find(item) == set.end());

set.insert(item);

}

REQUIRE(set.size() == N);

for(auto s : set) {

pool.recycle(s);

}

REQUIRE(N == pool.capacity());

REQUIRE(N == pool.num_available_objects());

REQUIRE(0 == pool.num_allocated_objects());

for(size_t i=0; i<N; ++i) {

auto item = pool.animate();

REQUIRE(set.find(item) != set.end());

}

REQUIRE(pool.num_available_objects() == 0);

REQUIRE(pool.num_allocated_objects() == N);

}

// --------------------------------------------------------

// Testcase: ObjectPool.Threaded

// --------------------------------------------------------

template <typename T>

void threaded_objectpool(unsigned W) {

tf::ObjectPool<T> pool;

std::vector<std::thread> threads;

for(unsigned w=0; w<W; ++w) {

threads.emplace_back([&pool](){

std::vector<T*> items;

for(int i=0; i<65536; ++i) {

auto item = pool.animate();

items.push_back(item);

}

for(auto item : items) {

pool.recycle(item);

}

});

}

for(auto& thread : threads) {

thread.join();

}

REQUIRE(pool.num_allocated_objects() == 0);

REQUIRE(pool.num_available_objects() == pool.capacity());

}

TEST_CASE("ObjectPool.1thread" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(1);

}

TEST_CASE("ObjectPool.2threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(2);

}

TEST_CASE("ObjectPool.3threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(3);

}

TEST_CASE("ObjectPool.4threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(4);

}

TEST_CASE("ObjectPool.5threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(5);

}

TEST_CASE("ObjectPool.6threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(6);

}

TEST_CASE("ObjectPool.7threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(7);

}

TEST_CASE("ObjectPool.8threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(8);

}

TEST_CASE("ObjectPool.9threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(9);

}

TEST_CASE("ObjectPool.10threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(10);

}

TEST_CASE("ObjectPool.11threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(11);

}

TEST_CASE("ObjectPool.12threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(12);

}

TEST_CASE("ObjectPool.13threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(13);

}

TEST_CASE("ObjectPool.14threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(14);

}

TEST_CASE("ObjectPool.15threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(15);

}

TEST_CASE("ObjectPool.16threads" * doctest::timeout(300)) {

threaded_objectpool<Poolable>(16);

}

// --------------------------------------------------------

// Testcase: Reference Wrapper

// --------------------------------------------------------

TEST_CASE("RefWrapper" * doctest::timeout(300)) {

static_assert(std::is_same<

tf::unwrap_reference_t<int>, int

>::value, "");

static_assert(std::is_same<

tf::unwrap_reference_t<int&>, int&

>::value, "");

static_assert(std::is_same<

tf::unwrap_reference_t<int&&>, int&&

>::value, "");

static_assert(std::is_same<

tf::unwrap_reference_t<std::reference_wrapper<int>>, int&

>::value, "");

static_assert(std::is_same<

tf::unwrap_reference_t<std::reference_wrapper<std::reference_wrapper<int>>>,

std::reference_wrapper<int>&

>::value, "");

static_assert(std::is_same<

tf::unwrap_ref_decay_t<int>, int

>::value, "");

static_assert(std::is_same<

tf::unwrap_ref_decay_t<int&>, int

>::value, "");

static_assert(std::is_same<

tf::unwrap_ref_decay_t<int&&>, int

>::value, "");

static_assert(std::is_same<

tf::unwrap_ref_decay_t<std::reference_wrapper<int>>, int&

>::value, "");

static_assert(std::is_same<

tf::unwrap_ref_decay_t<std::reference_wrapper<std::reference_wrapper<int>>>,

std::reference_wrapper<int>&

>::value, "");

}

//// --------------------------------------------------------

//// Testcase: FunctionTraits

//// --------------------------------------------------------

//void func1() {

//}

//int func2(int, double, float, char) {

// return 0;

//}

//TEST_CASE("FunctionTraits" * doctest::timeout(300)) {

// SUBCASE("func1") {

// using func1_traits = tf::function_traits<decltype(func1)>;

// static_assert(std::is_same<func1_traits::return_type, void>::value, "");

// static_assert(func1_traits::arity == 0, "");

// }

// SUBCASE("func2") {

// using func2_traits = tf::function_traits<decltype(func2)>;

// static_assert(std::is_same<func2_traits::return_type, int>::value, "");

// static_assert(func2_traits::arity == 4, "");

// static_assert(std::is_same<func2_traits::argument_t<0>, int>::value, "");

// static_assert(std::is_same<func2_traits::argument_t<1>, double>::value,"");

// static_assert(std::is_same<func2_traits::argument_t<2>, float>::value, "");

// static_assert(std::is_same<func2_traits::argument_t<3>, char>::value, "");

// }

// SUBCASE("lambda1") {

// auto lambda1 = [] () mutable {

// return 1;

// };

// using lambda1_traits = tf::function_traits<decltype(lambda1)>;

// static_assert(std::is_same<lambda1_traits::return_type, int>::value, "");

// static_assert(lambda1_traits::arity == 0, "");

// }

// SUBCASE("lambda2") {

// auto lambda2 = [] (int, double, char&) {

// };

// using lambda2_traits = tf::function_traits<decltype(lambda2)>;

// static_assert(std::is_same<lambda2_traits::return_type, void>::value, "");

// static_assert(lambda2_traits::arity == 3, "");

// static_assert(std::is_same<lambda2_traits::argument_t<0>, int>::value, "");

// static_assert(std::is_same<lambda2_traits::argument_t<1>, double>::value, "");

// static_assert(std::is_same<lambda2_traits::argument_t<2>, char&>::value, "");

// }

// SUBCASE("class") {

// struct foo {

// int operator ()(int, float) const;

// };

// using foo_traits = tf::function_traits<foo>;

// static_assert(std::is_same<foo_traits::return_type, int>::value, "");

// static_assert(foo_traits::arity == 2, "");

// static_assert(std::is_same<foo_traits::argument_t<0>, int>::value, "");

// static_assert(std::is_same<foo_traits::argument_t<1>, float>::value, "");

// }

// SUBCASE("std-function") {

// using ft1 = tf::function_traits<std::function<void()>>;

// static_assert(std::is_same<ft1::return_type, void>::value, "");

// static_assert(ft1::arity == 0, "");

// using ft2 = tf::function_traits<std::function<int(int&, double&&)>&>;

// static_assert(std::is_same<ft2::return_type, int>::value, "");

// static_assert(ft2::arity == 2, "");

// static_assert(std::is_same<ft2::argument_t<0>, int&>::value, "");

// static_assert(std::is_same<ft2::argument_t<1>, double&&>::value, "");

// using ft3 = tf::function_traits<std::function<int(int&, double&&)>&&>;

// static_assert(std::is_same<ft3::return_type, int>::value, "");

// static_assert(ft3::arity == 2, "");

// static_assert(std::is_same<ft3::argument_t<0>, int&>::value, "");

// static_assert(std::is_same<ft3::argument_t<1>, double&&>::value, "");

// using ft4 = tf::function_traits<const std::function<void(int)>&>;

// static_assert(std::is_same<ft4::return_type, void>::value, "");

// static_assert(ft4::arity == 1, "");

// static_assert(std::is_same<ft4::argument_t<0>, int>::value, "");

// }

//}

// --------------------------------------------------------

// Math utilities

// --------------------------------------------------------

TEST_CASE("NextPow2") {

static_assert(tf::next_pow2(0u) == 1);

static_assert(tf::next_pow2(1u) == 1);

static_assert(tf::next_pow2(100u) == 128u);

static_assert(tf::next_pow2(245u) == 256u);

static_assert(tf::next_pow2(512u) == 512u);

static_assert(tf::next_pow2(513u) == 1024u);

REQUIRE(tf::next_pow2(0u) == 1u);

REQUIRE(tf::next_pow2(2u) == 2u);

REQUIRE(tf::next_pow2(1u) == 1u);

REQUIRE(tf::next_pow2(33u) == 64u);

REQUIRE(tf::next_pow2(100u) == 128u);

REQUIRE(tf::next_pow2(211u) == 256u);

REQUIRE(tf::next_pow2(23u) == 32u);

REQUIRE(tf::next_pow2(54u) == 64u);

uint64_t z = 0;

uint64_t a = 1;

REQUIRE(tf::next_pow2(z) == 1);

REQUIRE(tf::next_pow2(a) == a);

REQUIRE(tf::next_pow2((a<<5) + 0) == (a<<5));

REQUIRE(tf::next_pow2((a<<5) + 1) == (a<<6));

REQUIRE(tf::next_pow2((a<<32) + 0) == (a<<32));

REQUIRE(tf::next_pow2((a<<32) + 1) == (a<<33));

REQUIRE(tf::next_pow2((a<<41) + 0) == (a<<41));

REQUIRE(tf::next_pow2((a<<41) + 1) == (a<<42));

REQUIRE(tf::is_pow2(0) == false);

REQUIRE(tf::is_pow2(1) == true);

REQUIRE(tf::is_pow2(2) == true);

REQUIRE(tf::is_pow2(3) == false);

REQUIRE(tf::is_pow2(0u) == false);

REQUIRE(tf::is_pow2(1u) == true);

REQUIRE(tf::is_pow2(54u) == false);

REQUIRE(tf::is_pow2(64u) == true);

}

// ----------------------------------------------------------------------------

// count the number of trailing zeros

// ----------------------------------------------------------------------------

TEST_CASE("CTZ") {

REQUIRE(tf::ctz<uint32_t>(0b00000001) == 0);

REQUIRE(tf::ctz<uint32_t>(0b00000010) == 1);

REQUIRE(tf::ctz<uint32_t>(0b00000100) == 2);

REQUIRE(tf::ctz<uint32_t>(0b10000000) == 7);

REQUIRE(tf::ctz<uint64_t>(0b00000001ULL) == 0);

REQUIRE(tf::ctz<uint64_t>(0b00000010ULL) == 1);

REQUIRE(tf::ctz<uint64_t>(0b00000100ULL) == 2);

REQUIRE(tf::ctz<uint64_t>(0x8000000000000000ULL) == 63);

//REQUIRE(tf::ctz<uint32_t>(0) == 32); // Undefined behavior, doesn't work for Windows

REQUIRE(tf::ctz<uint32_t>(0xFFFFFFFF) == 0);

REQUIRE(tf::ctz<uint32_t>(0x00010000) == 16);

REQUIRE(tf::ctz<uint32_t>(0x80000000) == 31);

//REQUIRE(tf::ctz<uint64_t>(0) == 64); // Undefined behavior, doesn't work for Windows

REQUIRE(tf::ctz<uint64_t>(0xFFFFFFFFFFFFFFFFULL) == 0);

REQUIRE(tf::ctz<uint64_t>(0x0000000100000000ULL) == 32);

REQUIRE(tf::ctz<uint64_t>(0x0000000000008000ULL) == 15);

REQUIRE(tf::ctz<uint64_t>(0x4000000000000000ULL) == 62);

}

// ----------------------------------------------------------------------------

// test coprimes

// ----------------------------------------------------------------------------

TEST_CASE("Coprimes") {

// Compile-time checks for known values

static_assert(tf::coprime(1) == 1);

static_assert(tf::coprime(2) == 1);

static_assert(tf::coprime(3) == 2);

static_assert(tf::coprime(4) == 3);

static_assert(tf::coprime(5) == 4);

static_assert(tf::coprime(6) == 5);

static_assert(tf::coprime(7) == 6);

static_assert(tf::coprime(8) == 7);

static_assert(tf::coprime(9) == 8);

static_assert(tf::coprime(10) == 9);

static_assert(tf::coprime(11) == 10);

static_assert(tf::coprime(12) == 11);

static_assert(tf::coprime(13) == 12);

static_assert(tf::coprime(14) == 13);

static_assert(tf::coprime(15) == 14);

static_assert(tf::coprime(16) == 15);

static_assert(tf::coprime(17) == 16);

static_assert(tf::coprime(18) == 17);

static_assert(tf::coprime(19) == 18);

static_assert(tf::coprime(20) == 19);

constexpr auto coprime_table = tf::make_coprimes<51>();

static_assert(coprime_table[1] == 1);

static_assert(coprime_table[2] == 1);

static_assert(coprime_table[3] == 2);

static_assert(coprime_table[4] == 3);

static_assert(coprime_table[5] == 4);

static_assert(coprime_table[6] == 5);

static_assert(coprime_table[7] == 6);

static_assert(coprime_table[8] == 7);

static_assert(coprime_table[9] == 8);

static_assert(coprime_table[10] == 9);

static_assert(coprime_table[11] == 10);

static_assert(coprime_table[12] == 11);

static_assert(coprime_table[13] == 12);

static_assert(coprime_table[14] == 13);

static_assert(coprime_table[15] == 14);

static_assert(coprime_table[16] == 15);

static_assert(coprime_table[17] == 16);

static_assert(coprime_table[18] == 17);

static_assert(coprime_table[19] == 18);

static_assert(coprime_table[20] == 19);

// Runtime assertions for all values up to 50

for (size_t i = 1; i <= 50; ++i) {

REQUIRE(std::gcd(i, coprime_table[i]) == 1);

REQUIRE(tf::coprime(i) == coprime_table[i]);

// randomly generate a coprime

auto v = ::rand() % 1048 + 2;

auto c = tf::coprime(v);

REQUIRE(std::gcd(v, c) == 1);

REQUIRE(c < v);

}

// ----------------------------------------------------------------------------

// Log2

// ----------------------------------------------------------------------------

TEST_CASE("FloorLog2") {

REQUIRE(tf::floor_log2(1u) == 0);

REQUIRE(tf::floor_log2(2u) == 1);

REQUIRE(tf::floor_log2(4u) == 2);

REQUIRE(tf::floor_log2(8u) == 3);

REQUIRE(tf::floor_log2(16u) == 4);

REQUIRE(tf::floor_log2(32u) == 5);

REQUIRE(tf::floor_log2(64u) == 6);

REQUIRE(tf::floor_log2(128u) == 7);

REQUIRE(tf::floor_log2(256u) == 8);

// Test non-powers of 2 (floor log2)

REQUIRE(tf::floor_log2(3u) == 1);

REQUIRE(tf::floor_log2(5u) == 2);

REQUIRE(tf::floor_log2(6u) == 2);

REQUIRE(tf::floor_log2(7u) == 2);

REQUIRE(tf::floor_log2(9u) == 3);

REQUIRE(tf::floor_log2(10u) == 3);

REQUIRE(tf::floor_log2(15u) == 3);

REQUIRE(tf::floor_log2(17u) == 4);

REQUIRE(tf::floor_log2(31u) == 4);

REQUIRE(tf::floor_log2(33u) == 5);

// Test large values

REQUIRE(tf::floor_log2(1023u) == 9);

REQUIRE(tf::floor_log2(1024u) == 10);

REQUIRE(tf::floor_log2(1025u) == 10);

REQUIRE(tf::floor_log2(std::numeric_limits<uint32_t>::max()) == 31);

REQUIRE(tf::floor_log2(std::numeric_limits<uint64_t>::max()) == 63);

}

taskflow/unittests/test_utility.cpp at master · HibsStatement/taskflow · GitHub

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