BlackMATov/flat.hpp
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flat.hpp/untests/flat_set_tests.cpp

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/*******************************************************************************
* This file is part of the "https://github.com/blackmatov/flat.hpp"
* For conditions of distribution and use, see copyright notice in LICENSE.md
* Copyright (C) 2019, by Matvey Cherevko (blackmatov@gmail.com)
******************************************************************************/
#define CATCH_CONFIG_FAST_COMPILE
#include <catch2/catch.hpp>
#include <deque>
#include <flat_hpp/flat_set.hpp>
using namespace flat_hpp;
namespace
{
template < typename T >
class dummy_allocator {
public:
using size_type = std::size_t;
using difference_type = std::ptrdiff_t;
using pointer = T*;
using const_pointer = const T*;
using reference = T&;
using const_reference = const T&;
using value_type = T;
using propagate_on_container_move_assignment = std::true_type;
using is_always_equal = std::true_type;
template < typename U >
struct rebind { using other = dummy_allocator<U>; };
dummy_allocator() = default;
dummy_allocator(int i) : i(i) {}
template < typename U >
dummy_allocator(const dummy_allocator<U>& o) noexcept {
i = o.i;
}
T* allocate(std::size_t n) noexcept {
return static_cast<T*>(std::malloc(sizeof(T) * n));
}
void deallocate(T* p, std::size_t n) noexcept {
(void)n;
std::free(p);
}
template < typename U, typename... Args >
void construct(U* p, Args&&... args) {
::new((void*)p) U(std::forward<Args>(args)...);
}
void destroy(pointer p) {
p->~T();
}
int i = 0;
};
template < typename T, typename U >
bool operator==(const dummy_allocator<T>&, const dummy_allocator<U>&) noexcept {
return true;
}
template < typename T, typename U >
bool operator!=(const dummy_allocator<T>& l, const dummy_allocator<U>& r) noexcept {
return !(l == r);
}
template < typename T >
constexpr std::add_const_t<T>& my_as_const(T& t) noexcept {
return t;
}
}
TEST_CASE("flat_set") {
SECTION("types") {
using set_t = flat_set<int>;
static_assert(
std::is_same<set_t::key_type, int>::value,
"unit test static error");
static_assert(
std::is_same<set_t::value_type, int>::value,
"unit test static error");
static_assert(
std::is_same<set_t::size_type, std::size_t>::value,
"unit test static error");
static_assert(
std::is_same<set_t::difference_type, std::ptrdiff_t>::value,
"unit test static error");
static_assert(
std::is_same<set_t::reference, int&>::value,
"unit test static error");
static_assert(
std::is_same<set_t::const_reference, const int&>::value,
"unit test static error");
static_assert(
std::is_same<set_t::pointer, int*>::value,
"unit test static error");
static_assert(
std::is_same<set_t::const_pointer, const int*>::value,
"unit test static error");
}
SECTION("ctors") {
using alloc_t = dummy_allocator<int>;
using set_t = flat_set<int, std::less<int>, alloc_t>;
using set2_t = flat_set<int, std::greater<int>, alloc_t>;
using vec_t = std::vector<int>;
{
auto s0 = set_t();
auto s1 = set2_t(alloc_t());
auto s2 = set_t(std::less<int>());
auto s3 = set2_t(std::greater<int>(), alloc_t());
}
{
vec_t v{1,2,3};
auto s0 = set_t(v.cbegin(), v.cend());
auto s1 = set2_t(v.cbegin(), v.cend(), alloc_t());
auto s2 = set_t(v.cbegin(), v.cend(), std::less<int>());
auto s3 = set2_t(v.cbegin(), v.cend(), std::greater<int>(), alloc_t());
REQUIRE(vec_t(s0.begin(), s0.end()) == vec_t({1,2,3}));
REQUIRE(vec_t(s1.begin(), s1.end()) == vec_t({3,2,1}));
REQUIRE(vec_t(s2.begin(), s2.end()) == vec_t({1,2,3}));
REQUIRE(vec_t(s3.begin(), s3.end()) == vec_t({3,2,1}));
}
{
auto s0 = set_t({0,1,2});
auto s1 = set2_t({0,1,2}, alloc_t());
auto s2 = set_t({0,1,2}, std::less<int>());
auto s3 = set2_t({0,1,2}, std::greater<int>(), alloc_t());
REQUIRE(vec_t(s0.begin(), s0.end()) == vec_t({0,1,2}));
REQUIRE(vec_t(s1.begin(), s1.end()) == vec_t({2,1,0}));
REQUIRE(vec_t(s2.begin(), s2.end()) == vec_t({0,1,2}));
REQUIRE(vec_t(s3.begin(), s3.end()) == vec_t({2,1,0}));
}
{
auto s0 = set_t();
auto s1 = set_t(alloc_t(42));
REQUIRE(s0.get_allocator().i == 0);
REQUIRE(s1.get_allocator().i == 42);
}
{
auto s0 = set_t{0,1,2};
auto s1 = s0;
REQUIRE(s0 == set_t{0,1,2});
REQUIRE(s1 == set_t{0,1,2});
auto s2 = std::move(s1);
REQUIRE(s1.empty());
REQUIRE(s2 == set_t{0,1,2});
}
{
auto s0 = set_t{0,1,2};
set_t s1;
s1 = s0;
REQUIRE(s0 == set_t{0,1,2});
REQUIRE(s1 == set_t{0,1,2});
set_t s2;
s2 = std::move(s1);
REQUIRE(s0 == set_t{0,1,2});
REQUIRE(s1.empty());
REQUIRE(s2 == set_t{0,1,2});
set_t s3;
s3 = {1,2,3};
REQUIRE(s3 == set_t{1,2,3});
}
}
SECTION("capacity") {
using set_t = flat_set<int>;
{
set_t s0;
REQUIRE(s0.empty());
REQUIRE_FALSE(s0.size());
REQUIRE(s0.max_size() == std::allocator<int>().max_size());
s0.insert(42);
REQUIRE_FALSE(s0.empty());
REQUIRE(s0.size() == 1u);
REQUIRE(s0.max_size() == std::allocator<int>().max_size());
s0.insert(42);
REQUIRE(s0.size() == 1u);
s0.insert(84);
REQUIRE(s0.size() == 2u);
s0.clear();
REQUIRE(s0.empty());
REQUIRE_FALSE(s0.size());
REQUIRE(s0.max_size() == std::allocator<int>().max_size());
}
{
set_t s0;
REQUIRE(s0.capacity() == 0);
s0.reserve(42);
REQUIRE(s0.capacity() == 42);
s0.insert({1,2,3});
REQUIRE(s0.capacity() == 42);
s0.shrink_to_fit();
REQUIRE(s0.size() == 3);
REQUIRE(s0.capacity() == 3);
REQUIRE(s0 == set_t{1,2,3});
using alloc2_t = dummy_allocator<int>;
using set2_t = flat_set<
int,
std::less<int>,
alloc2_t,
std::deque<int, alloc2_t>>;
set2_t s1;
s1.insert({1,2,3});
REQUIRE(s1 == set2_t{1,2,3});
}
}
SECTION("inserts") {
struct obj_t {
obj_t(int i) : i(i) {}
int i;
bool operator<(const obj_t& o) const {
return i < o.i;
}
bool operator==(const obj_t& o) const {
return i == o.i;
}
};
using set_t = flat_set<obj_t>;
{
set_t s0;
auto i0 = s0.insert(1);
REQUIRE(s0 == set_t{1});
REQUIRE(i0 == std::make_pair(s0.begin(), true));
auto i1 = s0.insert(obj_t(1));
REQUIRE(s0 == set_t{1});
REQUIRE(i1 == std::make_pair(s0.begin(), false));
auto i2 = s0.insert(obj_t(2));
REQUIRE(s0 == set_t{1,2});
REQUIRE(i2 == std::make_pair(s0.begin() + 1, true));
auto o2 = obj_t(2);
auto i3 = s0.insert(o2);
REQUIRE(i3 == std::make_pair(s0.begin() + 1, false));
s0.insert(s0.cbegin(), 1);
s0.insert(s0.cbegin(), 2);
s0.insert(s0.cend(), 1);
s0.insert(s0.cend(), 2);
REQUIRE(s0 == set_t{1,2});
s0.insert(s0.cbegin(), 0);
REQUIRE(s0 == set_t{0,1,2});
s0.insert(s0.cend(), 3);
REQUIRE(s0 == set_t{0,1,2,3});
s0.insert(s0.cbegin(), 4);
s0.insert(s0.cend(), -1);
REQUIRE(s0 == set_t{-1,0,1,2,3,4});
s0.insert(s0.cbegin() + 2, obj_t(5));
REQUIRE(s0 == set_t{-1,0,1,2,3,4,5});
s0.insert(s0.cbegin(), obj_t(-2));
REQUIRE(s0 == set_t{-2,-1,0,1,2,3,4,5});
}
{
set_t s0;
auto e0 = s0.emplace(3);
REQUIRE(s0 == set_t{3});
REQUIRE(e0 == std::make_pair(s0.begin(), true));
auto e1 = s0.emplace(obj_t(3));
REQUIRE(e1 == std::make_pair(s0.begin(), false));
auto e2 = s0.emplace(4);
REQUIRE(s0 == set_t{3,4});
REQUIRE(e2 == std::make_pair(s0.begin() + 1, true));
auto e3 = s0.emplace_hint(s0.cbegin(), 1);
REQUIRE(e3 == s0.begin());
auto e4 = s0.emplace_hint(s0.cend(), 2);
REQUIRE(e4 == s0.begin() + 1);
s0.emplace_hint(s0.cbegin(), 5);
s0.emplace_hint(s0.cend(), 6);
REQUIRE(s0 == set_t{1,2,3,4,5,6});
}
}
SECTION("erasers") {
using set_t = flat_set<int>;
{
set_t s0{1,2,3,4,5};
s0.clear();
REQUIRE(s0.empty());
}
{
set_t s0{1,2,3,4,5};
auto i = s0.erase(s0.find(3));
REQUIRE(i == s0.begin() + 2);
REQUIRE(s0 == set_t{1,2,4,5});
}
{
set_t s0{1,2,3,4,5};
auto i = s0.erase(s0.begin() + 2, s0.end());
REQUIRE(i == s0.end());
REQUIRE(s0 == set_t{1,2});
}
{
set_t s0{1,2,3,4,5};
REQUIRE(s0.erase(2) == 1);
REQUIRE(s0.erase(6) == 0);
REQUIRE(s0 == set_t{1,3,4,5});
}
{
set_t s0{1,2,3};
set_t s1{3,4,5};
s0.swap(s1);
REQUIRE(s0 == set_t{3,4,5});
REQUIRE(s1 == set_t{1,2,3});
swap(s1, s0);
REQUIRE(s0 == set_t{1,2,3});
REQUIRE(s1 == set_t{3,4,5});
}
}
SECTION("lookup") {
using set_t = flat_set<int>;
{
set_t s0{1,2,3,4,5};
REQUIRE(s0.count(3));
REQUIRE_FALSE(s0.count(6));
REQUIRE(my_as_const(s0).count(5));
REQUIRE_FALSE(my_as_const(s0).count(0));
}
{
set_t s0{1,2,3,4,5};
REQUIRE(s0.find(2) == s0.begin() + 1);
REQUIRE(my_as_const(s0).find(3) == s0.cbegin() + 2);
REQUIRE(s0.find(6) == s0.end());
REQUIRE(my_as_const(s0).find(0) == s0.cend());
}
{
set_t s0{1,2,3,4,5};
REQUIRE(s0.equal_range(3) == std::make_pair(s0.begin() + 2, s0.begin() + 3));
REQUIRE(s0.equal_range(6) == std::make_pair(s0.end(), s0.end()));
REQUIRE(my_as_const(s0).equal_range(3) == std::make_pair(s0.cbegin() + 2, s0.cbegin() + 3));
REQUIRE(my_as_const(s0).equal_range(0) == std::make_pair(s0.cbegin(), s0.cbegin()));
}
{
set_t s0{0,3,6,9};
REQUIRE(s0.lower_bound(0) == s0.begin());
REQUIRE(s0.lower_bound(1) == s0.begin() + 1);
REQUIRE(s0.lower_bound(10) == s0.end());
REQUIRE(my_as_const(s0).lower_bound(-1) == s0.cbegin());
REQUIRE(my_as_const(s0).lower_bound(7) == s0.cbegin() + 3);
}
}
SECTION("observers") {
struct my_less {
int i;
my_less(int i) : i(i) {}
bool operator()(int l, int r) const {
return l < r;
}
};
using set_t = flat_set<int, my_less>;
set_t s0(my_less(42));
REQUIRE(my_as_const(s0).key_comp().i == 42);
REQUIRE(my_as_const(s0).value_comp().i == 42);
}
SECTION("operators") {
using set_t = flat_set<int>;
REQUIRE(set_t{1,2,3} == set_t{3,2,1});
REQUIRE_FALSE(set_t{1,2,3} == set_t{3,2,4});
REQUIRE_FALSE(set_t{1,2,3} == set_t{1,2,3,4});
REQUIRE(set_t{1,2,3} != set_t{3,2,4});
REQUIRE_FALSE(set_t{1,2,3} != set_t{3,2,1});
REQUIRE(set_t{2,3,4,6} < set_t{2,3,5});
REQUIRE(set_t{2,3,4,6} <= set_t{2,3,5});
REQUIRE_FALSE(set_t{2,3,5} < set_t{2,3,4,6});
REQUIRE_FALSE(set_t{2,3,5} <= set_t{2,3,4,6});
REQUIRE_FALSE(set_t{2,3,4,6} > set_t{2,3,5});
REQUIRE_FALSE(set_t{2,3,4,6} >= set_t{2,3,5});
REQUIRE(set_t{2,3,5} > set_t{2,3,4,6});
REQUIRE(set_t{2,3,5} >= set_t{2,3,4,6});
REQUIRE_FALSE(set_t{1,2,3} < set_t{1,2,3});
REQUIRE(set_t{1,2,3} <= set_t{1,2,3});
REQUIRE_FALSE(set_t{1,2,3} > set_t{1,2,3});
REQUIRE(set_t{1,2,3} >= set_t{1,2,3});
const set_t s0;
REQUIRE(s0 == s0);
REQUIRE_FALSE(s0 != s0);
REQUIRE_FALSE(s0 < s0);
REQUIRE_FALSE(s0 > s0);
REQUIRE(s0 <= s0);
REQUIRE(s0 >= s0);
}
}
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